{"id":4604,"date":"2015-10-05T01:54:06","date_gmt":"2015-10-05T06:54:06","guid":{"rendered":"http:\/\/www.generationcp.org\/sunsetblog\/?p=4604"},"modified":"2016-02-22T19:05:12","modified_gmt":"2016-02-23T01:05:12","slug":"cassava-there-is-life-for-african-farmers","status":"publish","type":"post","link":"https:\/\/www.generationcp.org\/sunsetblog\/2015\/10\/05\/cassava-there-is-life-for-african-farmers\/","title":{"rendered":"Cassava: \u2018there is life\u2019 for African farmers"},"content":{"rendered":"<h3>Cassava brings life to African people<\/h3>\n<p><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_leaves_NP_CIAT_b.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: N Palmer\/CIAT alignright wp-image-4634 size-full\" title=\"Photo: N Palmer\/CIAT\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_leaves_NP_CIAT_b.jpg\" alt=\"Photo: N Palmer\/CIAT\" width=\"200\" height=\"301\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_leaves_NP_CIAT_b.jpg 200w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_leaves_NP_CIAT_b-199x300.jpg 199w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>Beyond the glittering coastline of what was once known as the Gold Coast, Ghana\u2019s shrublands and rich forested hills are split by forking rivers that reach inland through the country\u2019s lush tropics, into drier western Africa. In the past 40 years, seven major droughts have battered the people of Africa \u2013 with the most significant and devastating occurring in the Sahel region and the Horn of Africa in the early 1970s and 1980s.<\/p>\n<figure id=\"attachment_4639\" aria-describedby=\"caption-attachment-4639\" style=\"width: 200px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_girl_Bioversity.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: Y Wachira\/Bioversity International wp-image-4639 size-full\" title=\"Photo: Y Wachira\/Bioversity International\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_girl_Bioversity.jpg\" alt=\"Photo: Y Wachira\/Bioversity International\" width=\"200\" height=\"298\" \/><\/a><figcaption id=\"caption-attachment-4639\" class=\"wp-caption-text\">This little girl in Kenya already seems to know that cassava roots are precious.<\/figcaption><\/figure>\n<p>But despite the massive social disruption and human suffering that these droughts cause, life goes on. In south-eastern Ghana and in Togo, the three-million-plus people who speak the Ewe language have a word for this. It is <em>agbeli<\/em>: \u2018There is life\u2019. It is no coincidence that this word is also their name for a tropical and subtropical crop that survives through the worst times to feed Africa\u2019s families: cassava.<\/p>\n<p>Cassava is a lifeline for African people, and is a particularly important staple food for poorer farmers. More cassava is produced in Africa than any other crop, and it is grown by nearly every farming family in sub-Saharan Africa, supplying about a third of the region\u2019s daily energy intake. In the centuries since Portuguese traders introduced this Amazonian plant to Africa, cassava has flourished, yielding up to 40 tonnes per hectare.<\/p>\n<p><em>Hear more <em>on just why cassava is so important to food security<\/em> from Emmanuel Okogbenin, of Nigeria\u2019s National Root Crops Research Institute, in the video below (<a href=\"https:\/\/www.youtube.com\/watch?v=P_SiPN3oTpU&amp;index=7&amp;list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" target=\"_blank\">or watch on Youtube<\/a>):<\/em><\/p>\n<p><center><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/P_SiPN3oTpU?list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/center>&nbsp;<\/p>\n<p>African countries produced nearly 140 million tonnes of cassava in 2012 \u2013 but most of the production is subsistence farming by small-scale farmers. Even the undisputed global cassava giant, Nigeria, currently produces only just enough to feed its population \u2013 and although the country is increasingly moving towards production of cassava for export as an industrial raw material, the poorest farmers often do not produce enough to sell, or have access to these markets.<\/p>\n<p>Because cassava does so well on poor soils, on marginal land and with little rainfall, it can outlast its more sophisticated crop competitors: wheat, rice and maize. In fact, under harsh conditions such as drought, the amount of energy a given area of cassava plants can produce in the form of starchy carbohydrates outstrips all other crops. Chiedozie Egesi, a plant breeder and geneticist at Nigeria\u2019s <a href=\"http:\/\/www.nrcri.gov.ng\/\" target=\"_blank\">National Root Crops Research Institute (NRCRI)<\/a>, describes cassava as \u201cthe crop you can bet on when every other thing is failing\u201d.<\/p>\n<p><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4605\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-1.png\" alt=\"Benefits of cassava to African farmers and families Most cassava grown is consumed as food \u2013 for instance, as starchy, fine powder called tapioca or the fermented, flaky garri. The tubers can also be eaten boiled or fried in chunks, and are used in many other local dishes.  If cassava is grown in favourable conditions, its firm, white flesh can be rich in calcium and vitamin C and contain other vitamins such as B1, B2 and niacin. Some improved varieties are fortified with increased vitamin A levels, giving them a golden hue.   As well as being eaten directly, cassava can also be processed into ingredients for animal feed, alcohol production, confectionery, sweeteners, glues, plywood, textiles, paper and drugs.  Cassava tubers are easy to save for a rainy day \u2013 unlike other crops, they can be left in the ground for up to two years, so harvesting can be delayed until extra food is needed, or to await more optimal processing or marketing conditions.\" width=\"646\" height=\"346\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-1.png 646w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-1-300x160.png 300w\" sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><\/a><\/p>\n<p>Despite cassava\u2019s superhero cape, however, there\u2019s no denying that its production is not at its highest when faced with diseases, pests, low-nutrient soils and drought. How plants deal with problems like low nutrients or dry conditions is called \u2018stress tolerance\u2019 by scientists. Improving this tolerance \u2013 plus resistance to diseases and pests \u2013 is the long-term goal for staple crops around the world so that they have higher yields in the face of capricious weather and evolving threats.<\/p>\n<p>In the 1980s, catastrophe struck cassava production in East and Central Africa. A serious outbreak of cassava mosaic disease (CMD) \u2013 which first slowly shrivels and yellows cassava leaves, then its roots \u2013 lasted for almost 15 years and nearly halved cassava yields in that time. Food shortages led to localised famines in 1993 and 1997.<\/p>\n<p>Other diseases affecting cassava include <a href=\"http:\/\/generationcp.org\/communications\/media\/news-a-updates\/a-threat-from-the-east-deadly-cassava-disease-stalking-pristine-west-africa\" target=\"_blank\">cassava brown streak disease (CBSD)<\/a>, cassava bacterial blight, cassava anthracnose disease and root rot. CBSD is impossible to detect above ground. Its damage is revealed only after harvest, when it can be seen that the creeping brown lesions have spoilt the white flesh of the tubers, rendering them inedible. Many cassava diseases are transmitted through infected cuttings, affecting the next generation in the next season. Pests that also prey on cassava include the cassava green mite and the variegated grasshopper.<\/p>\n<p>Between the effects of drought, diseases, pests and low soil nutrients, cassava yields vary widely \u2013 losses can total between 50 and 100 percent in the worst times.<\/p>\n<figure id=\"attachment_4626\" aria-describedby=\"caption-attachment-4626\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/6091977909_3cc58cc0a9_o.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: IITA wp-image-4626 size-full\" title=\"Photo: IITA\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/6091977909_3cc58cc0a9_o.jpg\" alt=\"Photo: IITA\" width=\"700\" height=\"466\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/6091977909_3cc58cc0a9_o.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/6091977909_3cc58cc0a9_o-300x199.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4626\" class=\"wp-caption-text\">Symptoms of cassava mosaic disease (CMD) and cassava brown streak disease (CBSD), both of which can cripple cassava yields.<\/figcaption><\/figure>\n<h3>GCP takes the first steps to kick start cassava research<\/h3>\n<p>The next step forward for cassava appeared to be research towards breeding stronger and more resilient cassava varieties. However, cassava research had long been neglected \u2013 scientists say it\u2019s a tricky crop that has garnered far less policy, scientific and monetary interest than the comparatively glamorous crops of maize, rice and wheat.<\/p>\n<p><em>Watch as Emmanuel tells us more about the complexities and challenges of cassava breeding in the video below (<a href=\"https:\/\/www.youtube.com\/watch?v=qdFdmsiFgV8&amp;list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw&amp;index=8\" target=\"_blank\">or on YouTube<\/a>):<\/em><\/p>\n<p><center><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/qdFdmsiFgV8?list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/center>&nbsp;<\/p>\n<p>Cassava is a plant which \u2018drags its feet\u2019: creating new plants has to be done from cuttings, which are costly to cut and handle and don\u2019t store well; the plant takes up to two years to grow to maturity; and it is onerous to harvest. Elizabeth Parkes, of Ghana\u2019s <a href=\"http:\/\/www.cropsresearch.org\/\" target=\"_blank\">Crops Research Institute (CRI)<\/a> (currently on secondment at the <a href=\"http:\/\/www.iita.org\/\" target=\"_blank\">International Institute of Tropical Agriculture, IITA<\/a>), says the long wait can be difficult.<\/p>\n<p>This is where the work of scientists funded by the <a href=\"http:\/\/generationcp.org\/\" target=\"_blank\">CGIAR Generation Challenge Programme (GCP)<\/a> came in. Plant breeder and molecular geneticist Emmanuel Okogbenin of NRCRI led the cassava research push launched in 2010. He explains that before GCP, \u201cmost national programmes didn\u2019t really have established crop breeding programmes, and didn\u2019t have the manpower\u201d to do the scale of research GCP supported.<\/p>\n<p>Usually, researchers looking to breed crops that are more resistant to drought, diseases and pests would use conventional breeding methods that could take considerable time to deliver any results, especially given cassava\u2019s slow path to maturity. Researchers would be trying to select disease- and pest-resistant plants by looking at how they\u2019re growing in the field, without any way to see the different genetic strengths each plant has.<\/p>\n<figure id=\"attachment_4654\" aria-describedby=\"caption-attachment-4654\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_res_IFPRI.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: M Mitchell\/IFPRI wp-image-4654 size-full\" title=\"Photo: M Mitchell\/IFPRI\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_res_IFPRI.jpg\" alt=\"Photo: M Mitchell\/IFPRI\" width=\"700\" height=\"467\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_res_IFPRI.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_res_IFPRI-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4654\" class=\"wp-caption-text\">An IITA researcher exams cassava roots in the field.<\/figcaption><\/figure>\n<p>This is where new \u2018molecular breeding\u2019 tools are particularly useful, given that \u2013 genetically \u2013 cassava presents more of a challenge to breeders than its cereal counterparts. Like many other vegetatively propagated crops, cassava is highly heterozygous, meaning that the counterpart genes on paired chromosomes tend to be different versions, or alleles, rather than the same. This makes it difficult to identify good parent plants for breeding and, after these are crossed, to accurately select progeny with desired traits. Useful \u2013 or detrimental \u2013 genes can be present in a cassava plant\u2019s genetic code but not reflected in the plant itself, making breeding more unpredictable \u2013 and adding extra obstacles to the hunt for the exact genes that code for better varieties of cassava.<\/p>\n<p>Although late to the world of molecular breeding, cassava had not missed its chance. Guided by GCP\u2019s ambitious remit to increase food security through modern crop breeding, GCP-supported scientists have applied and developed molecular breeding methods that shorten the breeding process by identifying which plants have good genes, even before starting on that long cassava growth cycle. <a href=\"http:\/\/www.generationcp.org\/sunsetblog\/2015\/11\/04\/raising-a-new-crop-of-plant-breeders-to-protect-farmers-futures\/\">Increasing the capacity of local plant breeders<\/a> to apply these methods has great potential for delivering better varieties to farmers much faster than has traditionally been the case.<\/p>\n<p>Charting cassava\u2019s genetic material was the first step in the researchers\u2019 molecular quest. Part of the challenge for African and South American researchers was to create a genetic map of the cassava genome. Emmanuel describes the strong foundation that these early researchers built for those coming after: \u201cIt was significant when the first draft of the cassava genome sequence was released. It enabled rapid progress in cassava research activities and outcomes, both for GCP and cassava researchers worldwide.\u201d<\/p>\n<figure id=\"attachment_4657\" aria-describedby=\"caption-attachment-4657\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Uganda_NP_CIAT.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: N Palmer\/CIAT wp-image-4657 size-full\" title=\"Photo: N Palmer\/CIAT\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Uganda_NP_CIAT.jpg\" alt=\"Photo: N Palmer\/CIAT\" width=\"300\" height=\"451\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Uganda_NP_CIAT.jpg 300w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Uganda_NP_CIAT-199x300.jpg 199w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-4657\" class=\"wp-caption-text\">Cassava on sale in Kampala, Uganda.<\/figcaption><\/figure>\n<p>Once cassava\u2019s genome had been mapped, the pace picked up. In just one year, GCP-supported scientists phenotyped and genotyped more than 1000 genetically different cassava plants \u2013 that is, measured and collected a large amount of information about both their physical and their genetic traits \u2013 searching for \u2018superstar\u2019 plants with resistance to more than one crop threat. During this process, scientists compare plant\u2019s physical characteristics with their genetic makeup, looking for correlations that reveal regions of the DNA that seem to contain genes that confer traits they are looking for, such as resistance to a particular disease. Within these, scientists then identify sequences of DNA, or \u2018<a href=\"http:\/\/www.generationcp.org\/sunsetblog\/markers\/\">molecular markers<\/a>\u2019, associated with these valuable genes or genetic regions.<\/p>\n<p>Plant breeders can use this knowledge to apply an approach known as <a href=\"http:\/\/blog.generationcp.org\/2014\/06\/24\/the-curious-case-of-cassavas-quirks-narrated-in-nigeria\/\" target=\"_blank\">marker-assisted selection<\/a>, choosing their breeding crosses based directly on which plants contain useful genes, using markers like tags. This makes producing better plant varieties dramatically faster and more efficient. \u201cIt narrowed the search at an early stage,\u201d explains Emmanuel, \u201cso we could select only material that displayed markers for the genetic traits we\u2019re looking for. There is no longer any need to ship in tonnes of plant material to Africa.\u201d<\/p>\n<p>Like breadcrumbs leading to a clue, breeders use markers to lead to identifying actual genes (rather than just a site on the genome) that give certain plants desirable characteristics. However, this is a particularly difficult process in cassava. Genes are often obscured, partly due to cassava\u2019s highly heterozygous nature. In trials in Africa, where CMD is widespread, resistant types were hard to spot when challenged with the disease, and reliably resistant parents were hard to pin down.<\/p>\n<p>This meant that two decades of screening cassava varieties from South America \u2013 where CMD does not yet exist yet \u2013 had identified no CMD-resistance genes. But screening of cassava from Nigeria eventually yielded markers for a CMD-resistance gene \u2013 a great success for the international collaborative team led by Martin Fregene, who was based in Colombia at the <a href=\"http:\/\/ciat.cgiar.org\/\" target=\"_blank\">International Center for Tropical Agriculture (CIAT)<\/a>.<\/p>\n<p>This finding was a win for African plant breeders, as it meant they could use molecular breeding to combine the genes producing high-quality and high-yielding cassava from South America with the CMD-resistance gene found in cassava growing in Nigeria.<\/p>\n<p><a href=\"http:\/\/blog.generationcp.org\/2013\/11\/20\/cassavas-gain-and-surgerys-pain-career-crossings-and-causerie-with-chiedozie-egesi\/\" target=\"_blank\">Chiedozie Egesi<\/a>, who led the work on <a href=\"http:\/\/generationcp.org\/gcp-research\/research-initiatives\/cassava\/cassava-biotic-trait-markers\" target=\"_blank\">biotic trait markers<\/a>, explains the importance of combining varieties from South America with varieties from Africa: \u201cBecause cassava is not native to Africa, those varieties are not as genetically diverse, so we needed to bring genetic diversity from the centre of origin: South America. Coupling resistance genes from African varieties with genes for very high yields from South America was critical.\u201d<\/p>\n<h3>Cassava research leaps forward with new varieties to benefit farmers<\/h3>\n<p>GCP\u2019s first investment phase into cassava research stimulated a sturdy injection of people, passion, knowledge and funds into the second phase of research. From the genome maps created during the first phase, some of the world\u2019s best geneticists would now apply genomic tools and molecular breeding approaches to increase and accelerate the genetic gains during breeding, combining farmers\u2019 favourite characteristics with strong resistances and tolerances to abiotic and biotic constraints.<\/p>\n<p>In the sprawling, tropical city of Accra on Ghana\u2019s coast, the <a href=\"http:\/\/generationcp.org\/communications\/media\/feature-stories\/a-cross-continental-coalition-on-cassava-for-africa\" target=\"_blank\">second phase of the research was officially launched<\/a> at the end of the wet season in mid-2010. NRCRI\u2019s Emmanuel Okogbenin <a href=\"http:\/\/generationcp.org\/about-us\/product-delivery-coordinators#cassava\" target=\"_blank\">coordinated product delivery<\/a> from the projects, but the roles of Principal Investigator for the different projects were shared between another four individuals.<\/p>\n<p>These were breeder and geneticist Chiedozie Egesi (NRCRI, Nigeria), molecular geneticist Morag Ferguson (IITA), genomic scientist Pablo Rabinowicz (<a href=\"http:\/\/www.umd.edu\/\" target=\"_blank\">University of Maryland<\/a>, USA) and physiologist and geneticist Alfredo Alves (<a href=\"https:\/\/www.embrapa.br\/en\/home\" target=\"_blank\">Brazilian Corporation of Agricultural Research, EMBRAPA<\/a>). The team shared the vision of enabling farmers to increase cassava production for cash, well beyond subsistence levels.<\/p>\n<figure id=\"attachment_4656\" aria-describedby=\"caption-attachment-4656\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_flour_WB.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: A Hoel\/World Bank wp-image-4656 size-full\" title=\"Photo: A Hoel\/World Bank\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_flour_WB.jpg\" alt=\"Photo: A Hoel\/World Bank\" width=\"700\" height=\"467\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_flour_WB.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_flour_WB-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4656\" class=\"wp-caption-text\"><i>Garri<\/i>, or <i>gari<\/i>, a kind of granular cassava flour used to prepare a range of foods.<\/figcaption><\/figure>\n<p>If the Accra launch set the stage for the next five years of cassava collaboration, a <a href=\"http:\/\/generationcp.org\/communications\/media\/feature-stories\/disease-resistant-cassava-released-in-nigeria\" target=\"_blank\">breakthrough in Nigeria at the end of 2010<\/a> set the pace, with the release of Africa\u2019s first cassava variety developed using molecular-breeding techniques. \u201cIt was both disease-resistant and highly nutritious \u2013 a world-first,\u201d recalls Emmanuel proudly.<\/p>\n<p>Known as UMUCASS33 (or CR41-10), it took its high yield and nutritional value from its South American background, and incorporated Nigerian resistance to devastating CMD attacks thanks to marker-assisted selection. It was also resistant to several other pests and diseases. UMUCASS33 was swiftly followed by a stream of similar disease-busting varieties, released and supplied to farmers.<\/p>\n<p>Never before had cassava research been granted such a boost of recognition, scientific might and organisational will. And never before had there been so much farmer consultation or so many on-farm trials.<\/p>\n<p><strong>\u201cCassava was an orphan crop and with the help of GCP it is becoming more prominent,\u201d says Chiedozie. \u201cGCP highlighted and enhanced cassava\u2019s role as a major and reliable staple that is important to millions of poor Africans.\u201d<\/strong><\/p>\n<p>Another important challenge for scientists was to develop a higher-yielding cassava for water-limited environments. The aim was to keep mapping genes for resistance to other diseases and pests and then combine them with favourable genetics that increase yield in drought conditions \u2013 no easy feat. Drought\u2019s wicked effect on cassava is to limit the bulk of the tuber, or sometimes to stop the tuber forming altogether. Emmanuel led the work on <a href=\"http:\/\/generationcp.org\/gcp-research\/research-initiatives\/cassava\/cassava-mars-for-drought\" target=\"_blank\">marker-assisted recurrent selection for drought<\/a>.<\/p>\n<p><em>Hear from Chiedozie on the beneficial outcomes of GCP\u00a0\u2013 in terms not only of variety releases but also of attracting further projects, prestige, and enthusiastic young breeders\u00a0\u2013 in the video below (<a href=\"https:\/\/www.youtube.com\/watch?v=LCaX9vEfSMI&amp;list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw&amp;index=4\" target=\"_blank\">or on YouTube<\/a>):<\/em><\/p>\n<p><center><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/LCaX9vEfSMI?list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/center><\/p>\n<h3>Many traits and many varieties<\/h3>\n<p>As closely as the <a href=\"http:\/\/generationcp.org\/gcp-research\/research-initiatives\/cassava\/cassava-cassava-cop\" target=\"_blank\">cassava teams in Africa were working together<\/a>, Chiedozie recalls that each country\u2019s environment demanded different cassava characteristics: \u201cWe had to select for what worked best in each country, then continue with the research from there. What works fine for East Africa may not be so successful in Nigeria or Ghana\u201d. A core <a href=\"http:\/\/www.generationcp.org\/sunsetblog\/reference-sets\/\">reference set<\/a> representing most of the diversity of cassava in Africa was improved with the addition of over 564 varieties. <a href=\"http:\/\/generationcp.org\/gcp-research\/research-initiatives\/cassava\/cassava-africa-reference-set\" target=\"_blank\">Improving the reference set<\/a>, says project leader Morag Ferguson, \u201cenables the capture of many diverse features of cassava\u201d within a relatively small collection, providing a pathway for more efficient trait and gene discovery.<\/p>\n<p>While mapping of cassava\u2019s genetic makeup carried on, with a focus on drought tolerance, researchers continued to develop a suite of new varieties. They mapped out further genes that provided CMD resistance. In Tanzania, <a href=\"http:\/\/generationcp.org\/communications\/media\/feature-stories\/new-shoots-of-a-green-revolution-in-africa-disease-resistant-cassava-varieties-put-down-roots-in-tanzania\" target=\"_blank\">four new varieties were released<\/a> that combined resistance to both CMD and CBSD \u2013 two for the coastal belt and two for the semi-arid areas of central Tanzania. These new varieties had the potential to double the yield of existing commercial varieties. In Ghana too, disease-resistant varieties were being developed.<\/p>\n<figure id=\"attachment_4627\" aria-describedby=\"caption-attachment-4627\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_disease_comp_IITA.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: IITA wp-image-4627 size-full\" title=\"Photo: IITA\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_disease_comp_IITA.jpg\" alt=\"Photo: IITA\" width=\"700\" height=\"466\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_disease_comp_IITA.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cass_disease_comp_IITA-300x199.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4627\" class=\"wp-caption-text\">Built-in disease resistance can make a huge difference to the health of cassava crops. This photo shows a cassava variety resistant to African cassava mosaic virus (ACMV), which causes cassava mosaic disease (CMD), growing on the left, alongside a susceptible variety on the right.<\/figcaption><\/figure>\n<p>Meanwhile in Nigeria, another variety was released in 2012 with very high starch content \u2013 an essential factor in good cassava. This is a critical element to breeding any crop, explains Chiedozie: \u201cA variety may be scientifically perfect, based on a researcher\u2019s perspective, but farmers will not grow it if it fails the test in terms of taste, texture, colour or starchiness.\u201d<\/p>\n<p>Geoffrey Mkamilo, cassava research leader at Tanzania\u2019s Agricultural Research Institute, Naliendele, says that farmer awareness and adoption go hand in hand. Once they had the awareness, he says, \u201cthe farmers were knocking on our doors for improved varieties. They and NGOs were knocking and calling.\u201d<\/p>\n<p>After groundwork in Ghana and Nigeria to find potential sources of resistance, cassava varieties that are resistant to bacterial blight and green mites were also developed in Tanzania and then tested. By the time GCP closed in December 2014, these varieties were on their way to commercial breeders for farmers to take up.<\/p>\n<p>Scientists seeking to resolve the bigger challenge of drought resistance have achieved significant answers as well. Researchers have been able to map genetic regions that largely account for how well the crops deal with drought.<\/p>\n<p><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4608\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-2.png\" alt=\"Developing new varieties takes people, and time The numbers of new cassava varieties so far released through GCP-supported research do not tell the full story.   They certainly do not illustrate the patience and skill required from many different people to get to that end-stage of having a new cassava variety. In the first step, after the plants that seem to have resistance to CMD are identified, those plants are cloned and grown.   The DNA of these plantlets is then exposed to markers specific to valuable resistance genes, or regions of the genome known as quantitative trait loci (QTLs), in order to confirm the presence of the gene or QTL in question. Confirmed plants can be used as parents in breeding crosses after growing out and flowering \u2013 although sometimes plants don\u2019t flower, another hurdle for the cassava breeder.  This parental selection using genetic information is a powerful way to make cassava breeding more efficient. Breeders also use markers to identify which of the progeny from each cross have inherited the genes they are interested in. Over several generations of crosses, scientists can combine genes and QTLs for useful traits from different plant lines, to eventually develop a new variety for cultivation.  In cassava, this complex process can take seven years \u2013 although it takes even longer using only conventional breeding techniques. While fruition is slow, the research aided by GCP has sown the seeds for many more new varieties and bumper harvests for farmers into the future.\" width=\"646\" height=\"480\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-2.png 646w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/cassava-2-300x222.png 300w\" sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><\/a><\/p>\n<h3>Hunt for \u2018super powered\u2019 cassava<\/h3>\n<p>The hunt was on for drought-tolerance genes in African cassava plants. The end goal was to find as many different drought-related genes as possible, then to put them all together with the applicable disease and pest resistance genes, to make a \u2018super powered\u2019 set of cassava lines. Molecular breeders call this process \u2018pyramiding\u2019, and <a href=\"http:\/\/blog.generationcp.org\/2014\/03\/04\/cassava-on-the-catwalk-ghanaian-make-over-for-crop-science-underdog\/\" target=\"_blank\">in Ghana, Elizabeth Parkes led these projects<\/a>.<\/p>\n<p>With the help of Cornell University scientists, the researchers compared plants according to their starch content, how they endured a dry season, how they used sunlight and how they dealt with pests and diseases.<\/p>\n<p>Fourteen gene regions or quantitative trait loci (QTLs) were identified for 10 favourable traits from the genetic material in Ghana, while nine were found for the plants in Nigeria \u2013 with two shared between the plants from both Ghana and Nigeria. After that success, the identified genes were used in breeding programmes to develop a new generation of cassava with improved productivity.<\/p>\n<p><em>Pyramiding is important in effective disease resistance; Chiedozie explains in the video below (<a href=\"https:\/\/www.youtube.com\/watch?v=c3PKD449naI&amp;index=5&amp;list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" target=\"_blank\">or on YouTube<\/a>):<\/em><\/p>\n<p><center><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/c3PKD449naI?list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/center><\/p>\n<figure id=\"attachment_4624\" aria-describedby=\"caption-attachment-4624\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_vitA_HarvestPlus3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: HarvestPlus wp-image-4624 size-full\" title=\"Photo: HarvestPlus\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_vitA_HarvestPlus3.jpg\" alt=\"Photo: HarvestPlus\" width=\"300\" height=\"189\" \/><\/a><figcaption id=\"caption-attachment-4624\" class=\"wp-caption-text\">New cassava varieties rich in pro-vitamin A have a telltale golden hue.<\/figcaption><\/figure>\n<p>The research has also delivered results in terms of Vitamin A levels in cassava. In 2011, the NRCRI team, together with IITA and <a href=\"http:\/\/www.harvestplus.org\/\" target=\"_blank\">HarvestPlus<\/a> (another CGIAR Challenge Programme focussed on the nutritional enrichment of crops), released three cassava varieties rich in pro-vitamin A, which hold the potential to provide children under five and women of reproductive age with up to 25 percent of their daily vitamin A requirement. Since then, the team has aimed to increase this figure to 50 percent. In 2014, they released three more pro-vitamin A varieties with even higher concentrations of beta-carotene.<\/p>\n<figure id=\"attachment_4619\" aria-describedby=\"caption-attachment-4619\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_comp_IITA.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: IITA wp-image-4619 size-full\" title=\"Photo: IITA\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_comp_IITA.jpg\" alt=\"Photo: IITA\" width=\"700\" height=\"470\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_comp_IITA.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_comp_IITA-300x201.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4619\" class=\"wp-caption-text\">A field worker at IITA proudly displays a high-yielding, pro-vitamin A-rich cassava variety (right), compared with a traditional variety (left).<\/figcaption><\/figure>\n<p>The new varieties developed with GCP support are worth their weight in gold, says Chiedozie: \u201cThrough these varieties, people\u2019s livelihoods can be improved. The food people grow should be nutritious, resistant and high-yielding enough to allow them to sell some of it and make money for other things in life, such as building a house, getting a motorbike or sending their kids to school.\u201d<\/p>\n<p>Turning from Nigeria to Tanzania, Geoffrey has some remarkable numbers. He says that the national average cassava yield is 10.5 tonnes per hectare. He adds that a new cassava variety, PWANI, developed with GCP support and released in 2012, has the potential to increase yields to 51 tonnes per hectare. And they don\u2019t stop there: the Tanzanian researchers want to produce three million cuttings and directly reach over 2,000 farmers with these new varieties, then scale up further.<\/p>\n<figure id=\"attachment_4631\" aria-describedby=\"caption-attachment-4631\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Tanz_NP_CIAT.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: N Palmer\/CIAT wp-image-4631 size-full\" title=\"Photo: N Palmer\/CIAT\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Tanz_NP_CIAT.jpg\" alt=\"Photo: N Palmer\/CIAT\" width=\"700\" height=\"466\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Tanz_NP_CIAT.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Tanz_NP_CIAT-300x199.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4631\" class=\"wp-caption-text\">A farmer tends her cassava field in northern Tanzania.<\/figcaption><\/figure>\n<h3>Cassava grows up: looking ahead to supporting African families<\/h3>\n<p>Emmanuel reflects on how the first release of a new disease-resistant high-yielding cassava variety took fundamental science towards tangible realities for the world\u2019s farmers: \u201cIt was a great example of a practical application of marker technology for selecting important new traits, and it bodes well for the future as markers get fully integrated into cassava breeding.\u201d<\/p>\n<p>Emmanuel further believes that GCP\u2019s <a href=\"http:\/\/generationcp.org\/research\/research-initiatives\/cassava\" target=\"_blank\">Cassava Research Initiative<\/a> has given research communities \u201ca framework for international support from other investors to do research and development in modern breeding using genomic resources.\u201d Evaluations have demonstrated that molecular-assisted breeding can slash between three and five years from the timeline of developing better crops.<\/p>\n<figure id=\"attachment_4644\" aria-describedby=\"caption-attachment-4644\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/3546065403_022b2d8c05_o.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: M Perret\/UN Photo  wp-image-4644 size-full\" title=\"Photo: M Perret\/UN Photo \" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/3546065403_022b2d8c05_o.jpg\" alt=\"Photo: M Perret\/UN Photo \" width=\"300\" height=\"450\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/3546065403_022b2d8c05_o.jpg 300w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/3546065403_022b2d8c05_o-200x300.jpg 200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-4644\" class=\"wp-caption-text\">Women tend to bear most of the burden of cassava cultivation and preparation. Here a Congolese woman pounds cassava leaves \u2013 eaten in many regions in addition to cassava roots \u2013 prior to cooking a meal for her family.<\/figcaption><\/figure>\n<p>But, like cassava\u2019s long growth cycle underground, Emmanuel knows there is still a long road to maturity for cassava as a crop for Africa and in research. \u201cBreeding is just playing with genetics, but when you\u2019re done with that, there is still a lot to do in economics and agronomics,\u201d he says. Revolutionising cassava is about releasing improved varieties carefully buttressed by financial incentives and marketing opportunities.<\/p>\n<p><a href=\"http:\/\/blog.generationcp.org\/2014\/10\/14\/tribute-to-cassava-princess-pauper-mother-queen\/\" target=\"_blank\">Rural women in particular stand to benefit from improved varieties<\/a> \u2013 they carry most of the responsibility for producing, processing and marketing cassava. So far, Elizabeth explains: \u201cMost women reported an increase in their household income as a result of the improved cassava, but that is still dependent on extra time spent on cassava-related tasks\u201d \u2013 a burden which she aims to diminish.<\/p>\n<p><a href=\"http:\/\/blog.generationcp.org\/2014\/03\/05\/sororal-science-and-a-mentor-on-a-mission-why-cassava-and-capacity-building-are-closely-coupled\/\" target=\"_blank\">Elizabeth<\/a> emphasises that future improvement research has to take a bottom-up approach, first talking to female farmers to ensure that improved crops retain characteristics they already value in addition to the new traits. \u201cRural families are held together by women, so if you are able to change their lot, you can make a real mark,\u201d she says. Morag echoes this hope: \u201cWe are just starting to implement this now in Uganda; it\u2019s a more farmer-centric approach to breeding\u201d. The cassava teams emphasise the importance of supporting women in science too; the Tanzanians teams are aiming for a target of 40 percent women in their training courses.<\/p>\n<p><em>Meet Elizabeth in the podcast below (<a href=\"http:\/\/gcprogramme.podomatic.com\/entry\/2014-03-05T16_04_02-08_00\" target=\"_blank\">or on PodOmatic<\/a>), and be inspired by her passion when it comed to women in agriculture and in science:<\/em><\/p>\n<p><center><iframe loading=\"lazy\" src=\"http:\/\/gcprogramme.podomatic.com\/embed\/frame\/posting\/2014-03-05T16_04_02-08_00?json_url=http%3A%2F%2Fgcprogramme.podomatic.com%2Fentry%2Fembed_params%2F2014-03-05T16_04_02-08_00%3Fcolor%3D43bee7%26autoPlay%3Dfalse%26width%3D440%26height%3D85%26objembed%3D0\" width=\"440\" height=\"85\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/center>&nbsp;<\/p>\n<p>This direct impact goes much further than individuals, says Chiedozie. \u201cGCP\u2019s daring has enabled many national programmes to be self-empowered, where new avenues are unfolding for enhanced collaboration at the local, national and regional level. We\u2019re seeing a paradigm shift.\u201d And Chiedozie\u2019s objectives reach in a circle back to his compatriots: \u201cThrough GCP, I\u2019ve been able to achieve my aims of using the tools of science and technology to make the lives of poor Africans better by providing them with improved crops.\u201d<\/p>\n<p>GCP has been crucial for <a href=\"http:\/\/generationcp.org\/research\/research-themes\/capacity-building\" target=\"_blank\">developing the capacity<\/a> of countries to keep doing this level of research, says Chiedozie: \u201cThe developing-country programmes were never taken seriously,\u201d he says. <strong>\u201cBut when the GCP opportunity to change this came up we seized it, and now the developing-country programmes have the boldness, capacity and visibility to do this for themselves.\u201d<\/strong><\/p>\n<p>Emmanuel says his proudest moment was when GCP was looking for Africans to take up leadership roles. \u201cThey felt we could change things around and set a precedent to bring people back to the continent,\u201d he says. \u201cThey appreciated our values and the need to install African leaders on the ground in Africa rather than in Europe, Asia or the Americas.\u201d<\/p>\n<p>\u201cIf you want to work for the people, you have to walk with the people \u2013 that\u2019s an African concept. Then when you work with the people, you really understand what they want. When you speak, they know they can trust you.\u201d GCP trusted and trod where others had not before, Chiedozie says.<\/p>\n<p>Elizabeth agrees: \u201cIn the past, the assumption was always that \u2018Africa can\u2019t do this.\u2019 Now, people see that when given a chance to get around circumstances \u2013 as GCP has done for us through the provision of resources, motivation, encouragement and training \u2013 Africa can achieve so much!\u201d<\/p>\n<h3>More links<\/h3>\n<ul>\n<li>Profiles here on the Sunset Blog: <a href=\"http:\/\/www.generationcp.org\/sunsetblog\/2015\/10\/09\/elizabeth-parkes-cassavas-woman-of-destiny-in-ghana\/\">Elizabeth&#8217;s story<\/a> | Chiedozie&#8217;s story<\/li>\n<li>And an extra Sunset helping of cassava in the stories of our partnerships: <a href=\"http:\/\/www.generationcp.org\/sunsetblog\/2015\/10\/01\/tanzanias-researchers-turn-high-end-science-into-real-food\/\">ARI, Tanzania<\/a> | CRI, Ghana | <a href=\"http:\/\/www.generationcp.org\/sunsetblog\/2015\/10\/07\/nigerias-cassava-researchers-leading-the-march\/\">NRCRI, Nigeria<\/a><\/li>\n<li>Cassava <a href=\"http:\/\/blog.generationcp.org\/category\/cassava-2\/\" target=\"_blank\">blogposts<\/a> on the GCP Blog<\/li>\n<li>Cassava <a href=\"http:\/\/www.slideshare.net\/GCProgramme\/tag\/cassava\" target=\"_blank\">presentations<\/a> (on SlideShare)<\/li>\n<li>Cassava <a href=\"https:\/\/www.youtube.com\/watch?v=VBD9fi249JY&amp;list=PL_qCTCRACWIqxYoLp90CaSVkymCtkwcDw\" target=\"_blank\">video playlist<\/a> from Chiedozie and Emmanuel (on YouTube)<\/li>\n<li>Cassava <a href=\"http:\/\/www.podomatic.com\/playlist\/generationcp\/851463\" target=\"_blank\">podcasts<\/a> from Elizabeth (on PodOMatic)<\/li>\n<li>Cassava <a href=\"https:\/\/www.integratedbreeding.net\/146\/communities\/communities\/cassava\" target=\"_blank\">Community of Practice<\/a> (on IBP website)<\/li>\n<li>Cassava <a href=\"http:\/\/generationcp.org\/gcp-research\/crops\/cassava\" target=\"_blank\">Research Initiative<\/a> | <a href=\"http:\/\/generationcp.org\/gcp-research\/research-initiatives\/cassava\/cassava-cassava-infocentre\" target=\"_blank\">InfoCentre<\/a><\/li>\n<\/ul>\n<figure id=\"attachment_4629\" aria-describedby=\"caption-attachment-4629\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Benin_WB.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"Photo: A Hoel\/World Bank wp-image-4629 size-full\" title=\"Photo: A Hoel\/World Bank\" src=\"http:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Benin_WB.jpg\" alt=\"Photo: A Hoel\/World Bank\" width=\"700\" height=\"466\" srcset=\"https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Benin_WB.jpg 700w, https:\/\/www.generationcp.org\/sunsetblog\/wp-content\/uploads\/2015\/10\/Cassava_Benin_WB-300x199.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-4629\" class=\"wp-caption-text\">Walking into the future: farmer Felicienne Soton in her cassava field in Benin.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Cassava brings life to African people Beyond the glittering coastline of what was once known as the Gold Coast, Ghana\u2019s shrublands and rich forested hills are split by forking rivers that reach inland through the country\u2019s lush tropics, into drier western Africa. In the past 40 years, seven major droughts have battered the people of [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87,215,140],"tags":[16,18,17,86,11,38,9,575,287,508,211,299,222,184,266,183,23,138,223,225,514,492,90,24,459,201,189,72,357,164,407,349,177,142,501,66,216,432,512,389,281,417,456,42,345,436,511,204,513,356,510,75,509,435],"class_list":["post-4604","post","type-post","status-publish","format-standard","hentry","category-africa","category-cassava-2","category-crop-breeding-2","tag-capacity-building","tag-crop-breeding","tag-crop-improvement","tag-drought-tolerance","tag-food-security","tag-molecular-breeding","tag-partnerships","tag-africa","tag-ari-tanzania","tag-ari-naliendele","tag-cassava","tag-cassava-brown-streak-disease-cbsd","tag-cassava-mosaic-disease-cmd","tag-ciat","tag-cri-ghana","tag-crop-diseases","tag-crop-genetic-diversity","tag-crop-variety-release","tag-disease-resistance","tag-embrapa-brazil","tag-empowerment","tag-farmer-participation","tag-gene-discovery","tag-genetic-diversity","tag-genome-mapping","tag-genome-sequencing","tag-genotyping","tag-ghana","tag-higher-yields","tag-iita","tag-improved-varieties","tag-marker-assisted-breeding","tag-marker-assisted-selection-mas","tag-molecular-markers","tag-nari-tanzania","tag-nigeria","tag-nrcri-nigeria","tag-nutrient-enrichment","tag-nutritional-enrichment","tag-nutritional-value","tag-orphan-crops","tag-participatory-varietal-selection","tag-pest-resistance","tag-phenotyping","tag-poor-soils","tag-pro-vitamin-a","tag-pyramiding","tag-reference-set","tag-rural-women","tag-staple-foods","tag-starch-content","tag-tanzania","tag-university-of-maryland","tag-vitamin-a"],"_links":{"self":[{"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/posts\/4604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/comments?post=4604"}],"version-history":[{"count":48,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/posts\/4604\/revisions"}],"predecessor-version":[{"id":5198,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/posts\/4604\/revisions\/5198"}],"wp:attachment":[{"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/media?parent=4604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/categories?post=4604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.generationcp.org\/sunsetblog\/wp-json\/wp\/v2\/tags?post=4604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}