1. Origin and evolution of the bread wheat D genome.
- Author
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Cavalet-Giorsa E, González-Muñoz A, Athiyannan N, Holden S, Salhi A, Gardener C, Quiroz-Chávez J, Rustamova SM, Elkot AF, Patpour M, Rasheed A, Mao L, Lagudah ES, Periyannan SK, Sharon A, Himmelbach A, Reif JC, Knauft M, Mascher M, Stein N, Chayut N, Ghosh S, Perovic D, Putra A, Perera AB, Hu CY, Yu G, Ahmed HI, Laquai KD, Rivera LF, Chen R, Wang Y, Gao X, Liu S, Raupp WJ, Olson EL, Lee JY, Chhuneja P, Kaur S, Zhang P, Park RF, Ding Y, Liu DC, Li W, Nasyrova FY, Dvorak J, Abbasi M, Li M, Kumar N, Meyer WB, Boshoff WHP, Steffenson BJ, Matny O, Sharma PK, Tiwari VK, Grewal S, Pozniak CJ, Chawla HS, Ens J, Dunning LT, Kolmer JA, Lazo GR, Xu SS, Gu YQ, Xu X, Uauy C, Abrouk M, Bougouffa S, Brar GS, Wulff BBH, and Krattinger SG
- Subjects
- Alleles, Disease Resistance genetics, Domestication, Genes, Plant genetics, Genetic Variation genetics, Haplotypes genetics, Phylogeny, Plant Breeding, Plant Diseases genetics, Polyploidy, Aegilops genetics, Bread, Crops, Agricultural genetics, Evolution, Molecular, Genome, Plant genetics, Triticum genetics
- Abstract
Bread wheat (Triticum aestivum) is a globally dominant crop and major source of calories and proteins for the human diet. Compared with its wild ancestors, modern bread wheat shows lower genetic diversity, caused by polyploidisation, domestication and breeding bottlenecks
1,2 . Wild wheat relatives represent genetic reservoirs, and harbour diversity and beneficial alleles that have not been incorporated into bread wheat. Here we establish and analyse extensive genome resources for Tausch's goatgrass (Aegilops tauschii), the donor of the bread wheat D genome. Our analysis of 46 Ae. tauschii genomes enabled us to clone a disease resistance gene and perform haplotype analysis across a complex disease resistance locus, allowing us to discern alleles from paralogous gene copies. We also reveal the complex genetic composition and history of the bread wheat D genome, which involves contributions from genetically and geographically discrete Ae. tauschii subpopulations. Together, our results reveal the complex history of the bread wheat D genome and demonstrate the potential of wild relatives in crop improvement., (© 2024. The Author(s).)- Published
- 2024
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