Population genomic analysis of Aegilops tauschii identifies targets for bread wheat improvement

Aegilops tauschii, the diploid wild progenitor of the D subgenome of bread wheat, is a reservoir of genetic diversity for improving bread wheat performance and environmental resilience. Here we sequenced 242 Ae. tauschii accessions and compared them to the wheat D subgenome to characterize genomic d...

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Detalles Bibliográficos
Autores: Gaurav, K., Sanu Arora, Silva, P., Sánchez-Martín, J., Horsnell, R., Liangliang Gao, Brar, G.S., Widrig, V., Raupp, W.J., Singh, N., Shuangye Wu, Kale, S., Chinoy, C., Nicholson, P., Quiroz-Chávez, J., Simmonds, J., Hayta, S., Smedley, M.A., Harwood, W., Pearce, S., Gilbert, D., Ngonidzashe Kangara, Gardener, C., Forner-Martínez, M., Jiaqian Liu, Guotai Yu, Boden, S.A., Pascucci, A., Ghosh, S., Hafeez, A.N., O’Hara, T., Waites, J., Cheema, J., Steuernagel, B., Patpour, M., Justesen, A.F., Shuyu Liu, Rudd, J.C., Avni, R., Sharon, A., Steiner, B., Kirana, R.P., Buerstmayr, H., Mehrabi, A.A., Nasyrova, F.Y., Chayut, N., Matny, O., Steffenson, B., Sandhu, N., Chhuneja, P., Lagudah, E., Elkot, A.F., Tyrrell, S., Xingdong Bian, Davey, R., Simonsen, M., Schauser, L., Tiwari, V.K., Kutcher, H.R., Hucl, P.J., Aili Li, Liu Dengcai, Long Mao, Xu, S., Brown-Guedira, G., Faris, J., Dvorak, J., Ming-Cheng Luo, Krasileva, K., Lux, T., Artmeier, S., Mayer, K., Uauy, C., Mascher, M., Bentley, A.R., Keller, B., Poland, J., Wulff, B.B.H.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:México
Institución:Centro Internacional de Mejoramiento de Maíz y Trigo
Repositorio:Repositorio Institucional de Publicaciones Multimedia del CIMMYT
OAI Identifier:oai:repository.cimmyt.org:10883/21731
Acceso en línea:https://hdl.handle.net/10883/21731
Access Level:acceso abierto
Palabra clave:AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
POPULATION GENETICS
AEGILOPS
PLANT BREEDING
CROP IMPROVEMENT
SOFT WHEAT
Descripción
Sumario:Aegilops tauschii, the diploid wild progenitor of the D subgenome of bread wheat, is a reservoir of genetic diversity for improving bread wheat performance and environmental resilience. Here we sequenced 242 Ae. tauschii accessions and compared them to the wheat D subgenome to characterize genomic diversity. We found that a rare lineage of Ae. tauschii geographically restricted to present-day Georgia contributed to the wheat D subgenome in the independent hybridizations that gave rise to modern bread wheat. Through k-mer-based association mapping, we identified discrete genomic regions with candidate genes for disease and pest resistance and demonstrated their functional transfer into wheat by transgenesis and wide crossing, including the generation of a library of hexaploids incorporating diverse Ae. tauschii genomes. Exploiting the genomic diversity of the Ae. tauschii ancestral diploid genome permits rapid trait discovery and functional genetic validation in a hexaploid background amenable to breeding.

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