African yam domestication in light of the NGS revolution
Yam (Dioscorea sp.) produces a starchy tuber cultivated for human consumption. It is a backbone for food security in tropical countries, especially in West Africa. The most cultivated species, D. rotundata, originated from Africa. However, due to the lack of archaeological data and genetic tools, very little is known about yam domestication. Currently, the wild progenitor of yam is unclear and the geographical origin of yam cultivation has not been elucidated. Here, we took advantage of the recent sequencing of the D. rotundata genome and the development of new powerful analyses to get new insights into the domestication process of African yam. We analyzed a large sampling of cultivated yam and its two closest wild relatives, the savannah species D. abyssinica and the forest species D. praehensilis, collected in West Africa and Cameroon. Whole genome resequencing produced more than 3 million good quality SNPs and revealed a strong genetic structure between the three species, as well as between Cameroon and West African countries. Using coalescent models, we showed that cultivated yam was domesticated from the forest species D. praehensilis. Spatially explicit models inferred an origin of yam culture expansion in the Niger River basin, in a region located in north Benin.
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dig-cirad-fr-5955232023-04-07T16:01:14Z http://agritrop.cirad.fr/595523/ http://agritrop.cirad.fr/595523/ African yam domestication in light of the NGS revolution. Scarcelli Nora, Cubry Philippe, Akakpo Roland, Thuillet Anne-Céline, Obidiegwu Jude, Baco Mohamed N., Otoo Emmanuel, Sonké Bonaventure, Dansi Alexandre, Djedatin Gustave, Mariac Cédric, Couderc Marie, Causse Sandrine, Alix Karine, Chaïr Hâna, François Olivier, Vigouroux Yves. 2019. In : Dedicated to the origins of agriculture and the domestication, evolution and utilization of genetic resources. Abstracts book. IRD, Bioversity International, Agropolis International, CIRAD, Montpellier SupAgro, Université de Montpellier, INRA. Montpellier : IRD, Résumé, p. 42. Jack R. Harlan International Symposium. 3, Montpellier, France, 3 Juin 2019/7 Juin 2019. Researchers African yam domestication in light of the NGS revolution Scarcelli, Nora Cubry, Philippe Akakpo, Roland Thuillet, Anne-Céline Obidiegwu, Jude Baco, Mohamed N. Otoo, Emmanuel Sonké, Bonaventure Dansi, Alexandre Djedatin, Gustave Mariac, Cédric Couderc, Marie Causse, Sandrine Alix, Karine Chaïr, Hâna François, Olivier Vigouroux, Yves eng 2019 IRD Dedicated to the origins of agriculture and the domestication, evolution and utilization of genetic resources. Abstracts book Yam (Dioscorea sp.) produces a starchy tuber cultivated for human consumption. It is a backbone for food security in tropical countries, especially in West Africa. The most cultivated species, D. rotundata, originated from Africa. However, due to the lack of archaeological data and genetic tools, very little is known about yam domestication. Currently, the wild progenitor of yam is unclear and the geographical origin of yam cultivation has not been elucidated. Here, we took advantage of the recent sequencing of the D. rotundata genome and the development of new powerful analyses to get new insights into the domestication process of African yam. We analyzed a large sampling of cultivated yam and its two closest wild relatives, the savannah species D. abyssinica and the forest species D. praehensilis, collected in West Africa and Cameroon. Whole genome resequencing produced more than 3 million good quality SNPs and revealed a strong genetic structure between the three species, as well as between Cameroon and West African countries. Using coalescent models, we showed that cultivated yam was domesticated from the forest species D. praehensilis. Spatially explicit models inferred an origin of yam culture expansion in the Niger River basin, in a region located in north Benin. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/595523/2/ID595523.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html |
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Yam (Dioscorea sp.) produces a starchy tuber cultivated for human consumption. It is a backbone for food security in tropical countries, especially in West Africa. The most cultivated species, D. rotundata, originated from Africa. However, due to the lack of archaeological data and genetic tools, very little is known about yam domestication. Currently, the wild progenitor of yam is unclear and the geographical origin of yam cultivation has not been elucidated. Here, we took advantage of the recent sequencing of the D. rotundata genome and the development of new powerful analyses to get new insights into the domestication process of African yam. We analyzed a large sampling of cultivated yam and its two closest wild relatives, the savannah species D. abyssinica and the forest species D. praehensilis, collected in West Africa and Cameroon. Whole genome resequencing produced more than 3 million good quality SNPs and revealed a strong genetic structure between the three species, as well as between Cameroon and West African countries. Using coalescent models, we showed that cultivated yam was domesticated from the forest species D. praehensilis. Spatially explicit models inferred an origin of yam culture expansion in the Niger River basin, in a region located in north Benin. |
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conference_item |
author |
Scarcelli, Nora Cubry, Philippe Akakpo, Roland Thuillet, Anne-Céline Obidiegwu, Jude Baco, Mohamed N. Otoo, Emmanuel Sonké, Bonaventure Dansi, Alexandre Djedatin, Gustave Mariac, Cédric Couderc, Marie Causse, Sandrine Alix, Karine Chaïr, Hâna François, Olivier Vigouroux, Yves |
spellingShingle |
Scarcelli, Nora Cubry, Philippe Akakpo, Roland Thuillet, Anne-Céline Obidiegwu, Jude Baco, Mohamed N. Otoo, Emmanuel Sonké, Bonaventure Dansi, Alexandre Djedatin, Gustave Mariac, Cédric Couderc, Marie Causse, Sandrine Alix, Karine Chaïr, Hâna François, Olivier Vigouroux, Yves African yam domestication in light of the NGS revolution |
author_facet |
Scarcelli, Nora Cubry, Philippe Akakpo, Roland Thuillet, Anne-Céline Obidiegwu, Jude Baco, Mohamed N. Otoo, Emmanuel Sonké, Bonaventure Dansi, Alexandre Djedatin, Gustave Mariac, Cédric Couderc, Marie Causse, Sandrine Alix, Karine Chaïr, Hâna François, Olivier Vigouroux, Yves |
author_sort |
Scarcelli, Nora |
title |
African yam domestication in light of the NGS revolution |
title_short |
African yam domestication in light of the NGS revolution |
title_full |
African yam domestication in light of the NGS revolution |
title_fullStr |
African yam domestication in light of the NGS revolution |
title_full_unstemmed |
African yam domestication in light of the NGS revolution |
title_sort |
african yam domestication in light of the ngs revolution |
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IRD |
url |
http://agritrop.cirad.fr/595523/ http://agritrop.cirad.fr/595523/2/ID595523.pdf |
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