Genome analyses reveal the hybrid origin of the staple crop white Guinea yam (Dioscorea rotundata)

Sugihara, Yu, Darkwa, Kwabena, Yaegashi, Hiroki, Natsume, Satoshi, Shimizu, Motoki, Abe, Akira, Hirabuchi, Akiko, Ito, Kazue, Oikawa, Kaori, Tamiru-Oli, Muluneh, Ohta, Atsushi, Matsumoto, Ryo, Agre, Paterne, De Koeyer, David, Pachakkil, Babil, Yamanaka, Shinsuke, Muranaka, Satoru, Takagi, Hiroko, White, Ben, Asiedu, Robert, Innan, Hideki, Asfaw, Asrat, Adebola, Patrick, Terauchi, Ryohei

Abstract

White Guinea yam (Dioscorea rotundata) is an important staple tuber crop in West Africa. However, its origin remains unclear. In this study, we resequenced 336 accessions of white Guinea yam and compared them with the sequences of wild Dioscorea species using an improved reference genome sequence of D. rotundata. In contrast to a previous study suggesting that D. rotundata originated from a subgroup of Dioscorea praehensilis, our results suggest a hybrid origin of white Guinea yam from crosses between the wild rainforest species D. praehensilis and the savannah-adapted species Dioscorea abyssinica. We identified a greater genomic contribution from D. abyssinica in the sex chromosome of Guinea yam and extensive introgression around the SWEETIE gene. Our findings point to a complex domestication scenario for Guinea yam and highlight the importance of wild species as gene donors for improving this crop through molecular breeding.

Journal

Proceedings of the National Academy of Sciences of the United States of America

Proceedings of the National Academy of Sciences of the United States of America 117 (50), 31987-31992, 2020-12-15

National Academy of Sciences

Keywords

Details 詳細情報について

CRID: 1050287297257961088

NII Article ID: 120006938945

ISSN: 00278424

HANDLE: 2433/259769

Text Lang: en

Article Type: journal article

Data Source

IRDB
CiNii Articles

Export