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

, 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. Iden...

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Bibliographic Details
Published in:Plants (Basel) 2021-01, Vol.10 (2), p.211
Main Authors: Mahjoob, Mazin Mahjoob Mohamed, Gorafi, Yasir Serag Alnor, Kamal, Nasrein Mohamed, Yamasaki, Yuji, Tahir, Izzat Sidahmed Ali, Matsuoka, Yoshihiro, Tsujimoto, Hisashi
Format: Article
Language:English
Subjects:
Adaptation
Aegilops tauschii
Bread
DArTseq marker
Evolution
Genes
Genetic diversity
Genome-wide association studies
Genomes
Goat grass
Grain
GWAS
Markers
morpho-physiological diversity
Morphology
Physiology
Plant morphology
Triticum aestivum
Wheat
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Summary:, 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 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 , 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 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 , and thus in bread wheat even if the plant morphology is different.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10020211