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Population genomics unravels the Holocene history of bread wheat and its relatives

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Title Population genomics unravels the Holocene history of bread wheat and its relatives
 
Creator Zhao, X.
Guo, Y.
Kang, L.
Yin, C.
Bi, A.
Xu, D.
Zhang, Z.
Zhang, J.
Yang, X.
Xu, J.
Xu, S.
Song, X.
Zhang, M.
Li, Y.
Kear, P.
Wang, J.
Liu, Z.
Fu, X.
Lu, F.
 
Subject biodiversity
food security
genomics
 
Description Deep knowledge of crop biodiversity is essential to improving global food security. Despite bread wheat serving as a keystone crop worldwide, the population history of bread wheat and its relatives, both cultivated and wild, remains elusive. By analysing whole-genome sequences of 795 wheat accessions, we found that bread wheat originated from the southwest coast of the Caspian Sea and underwent a slow speciation process, lasting ~3,300 yr owing to persistent gene flow from its relatives. Soon after, bread wheat spread across Eurasia and reached Europe, South Asia and East Asia ~7,000 to ~5,000 yr ago, shaping a diversified but occasionally convergent adaptive landscape in novel environments. By contrast, the cultivated relatives of bread wheat experienced a population decline by ~82% over the past ~2,000 yr due to the food choice shift of humans. Further biogeographical modelling predicted a continued population shrinking of many bread wheat relatives in the coming decades because of their vulnerability to the changing climate. These findings will guide future efforts in protecting and utilizing wheat biodiversity to enhance global wheat production.
 
Date 2023-03-16
2023-04-05T16:57:12Z
2023-04-05T16:57:12Z
 
Type Journal Article
 
Identifier Zhao, X.; Guo, Y.; Kang, L.; Yin, C.; Bi, A.; Xu, D.; Zhang, Z.; Zhang, J.; Yang, X.; Xu, J.; Xu, S.; Song, X.; Zhang, M.; Li, Y.; Kear, P.; Wang, J.; Liu, Z.; Fu, X.; Lu, F. 2023. Population genomics unravels the Holocene history of bread wheat and its relatives. Nature Plants. ISSN 2055-0278. 9(3), 403–419.
2055-0278
https://hdl.handle.net/10568/129911
https://doi.org/10.1038/s41477-023-01367-3
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format 403-419
 
Source Nature Plants