Genome-Wide Association Study of Morpho-Physiological Traits in Aegilops tauschii to Broaden Wheat Genetic Diversity

Plants

YasirSerag Alnor Gorafi¹  IzzatSidahmed Ali Tahir¹  NasreinMohamed Kamal¹  Yuji Yamasaki²  Hisashi Tsujimoto²  Yoshihiro Matsuoka³  MazinMahjoob Mohamed Mahjoob⁴ 

[1] Agricultural Research Corporation, Wheat Research Program, P.O. Box 126, Wad Medani, Sudan;Arid Land Research Center, Tottori University, Tottori 680-0001, Japan;Department of Bioscience, Fukui Prefectural University, Eiheiji, Yoshida, Fukui 910-1195, Japan;United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan;

关键词: Aegilops tauschii;    Triticum aestivum;    morpho-physiological diversity;    genetic diversity;    GWAS;    DArTseq marker;   

DOI  :  10.3390/plants10020211

来源: DOAJ

【 摘 要 】

Aegilops tauschii, the D-genome donor of bread wheat, is a storehouse of genetic diversity that can be used for wheat improvement. This species consists of two main lineages (TauL1 and TauL2) and one minor lineage (TauL3). Its morpho-physiological diversity is large, with adaptations to a wide ecological range. Identification of allelic diversity in Ae. tauschii is of utmost importance for efficient breeding and widening of the genetic base of wheat. This study aimed at identifying markers or genes associated with morpho-physiological traits in Ae. tauschii, and at understanding the difference in genetic diversity between the two main lineages. We performed genome-wide association studies of 11 morpho-physiological traits of 343 Ae. tauschii accessions representing the entire range of habitats using 34,829 DArTseq markers. We observed a wide range of morpho-physiological variation among all accessions. We identified 23 marker–trait associations (MTAs) in all accessions, 15 specific to TauL1 and eight specific to TauL2, suggesting independent evolution in each lineage. Some of the MTAs could be novel and have not been reported in bread wheat. The markers or genes identified in this study will help reveal the genes controlling the morpho-physiological traits in Ae. tauschii, and thus in bread wheat even if the plant morphology is different.

【 授权许可】

Unknown