Genome Analyses Reveal the Hybrid Origin of the Staple Crop White Guinea Yam (Dioscorea Rotundata)
Genome analyses reveal the hybrid origin of the staple crop white Guinea yam (Dioscorea rotundata) Yu Sugiharaa, Kwabena Darkwab, Hiroki Yaegashic, Satoshi Natsumec, Motoki Shimizuc, Akira Abec, Akiko Hirabuchic, Kazue Itoc, Kaori Oikawac, Muluneh Tamiru-Olic,d, Atsushi Ohtaa, Ryo Matsumotob, Paterne Agreb, David De Koeyerb,e, Babil Pachakkilf,g, Shinsuke Yamanakaf, Satoru Muranakaf, Hiroko Takagif, Ben Whiteh, Robert Asiedub, Hideki Innani, Asrat Asfawb,1, Patrick Adebolab,1, and Ryohei Terauchia,c,1 aLaboratory of Crop Evolution, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan; bInternational Institute of Tropical Agriculture, Ibadan 200001, Nigeria; cIwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan; dDepartment of Animal, Plant, and Soil Sciences, School of Life Sciences, La Trobe University, Melbourne, VIC 3086, Australia; eFredericton Research and Development Centre, Agriculture and Agri-Food Canada, Fredericton, NB E3B 4Z7, Canada; fJapan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan; gDepartment of International Agricultural Development, Tokyo University of Agriculture, Tokyo 183-8538, Japan; hEarlham Institute, Norwich NR4 7UZ, United Kingdom; and iLaboratory of Population Genetics and Genome Evolution, The Graduate University for Advanced Studies, Hayama 240-0193, Japan Edited by Loren H. Rieseberg, University of British Columbia, Vancouver, BC, Canada, and approved November 2, 2020 (received for review July 27, 2020) White Guinea yam (Dioscorea rotundata) is an important staple praehensilis, and 34 D. abyssinica accessions suggested that dip- tuber crop in West Africa. However, its origin remains unclear. In loid D. rotundata was domesticated from D. praehensilis (10). this study, we resequenced 336 accessions of white Guinea yam Here we addressed this hypothesis using an expanded set of and compared them with the sequences of wild Dioscorea species genomes from cultivated and wild Dioscorea species.
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