Mahjoob Mazin Mahjoob Mohamed, Gorafi Yasir Serag Alnor, Kamal Nasrein Mohamed, Yamasaki Yuji, Tahir Izzat Sidahmed Ali, Matsuoka Yoshihiro, Tsujimoto Hisashi
United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan.
Agricultural Research Corporation, Wheat Research Program, P.O. Box 126, Wad Medani, Sudan.
Plants (Basel). 2021 Jan 22;10(2):211. doi: 10.3390/plants10020211.
, 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.
节节麦是普通小麦的D基因组供体，是一个遗传多样性的宝库，可用于小麦改良。该物种由两个主要谱系（TauL1和TauL2）和一个次要谱系（TauL3）组成。其形态生理多样性很大，能适应广泛的生态范围。鉴定节节麦的等位基因多样性对于高效育种和拓宽小麦遗传基础至关重要。本研究旨在鉴定与节节麦形态生理性状相关的标记或基因，并了解两个主要谱系之间遗传多样性的差异。我们使用34,829个DArTseq标记对代表整个生境范围的343份节节麦材料的11个形态生理性状进行了全基因组关联研究。我们在所有材料中观察到广泛的形态生理变异。我们在所有材料中鉴定出23个标记-性状关联（MTA），其中15个特定于TauL1，8个特定于TauL2，这表明每个谱系独立进化。一些MTA可能是新的，在普通小麦中尚未报道。本研究中鉴定出的标记或基因将有助于揭示控制节节麦形态生理性状的基因，从而即使植物形态不同也有助于揭示普通小麦中的相关基因。
