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A thorough screening based on QTLs controlling zinc and copper accumulation in the grain of different wheat genotypes

文献类型： 外文期刊

作者： Liu, Ying 1 ; Chen, Yaru 1 ; Yang, Yang 1 ; Zhang, Qiaofeng 2 ; Fu, Bisheng 2 ; Cai, Jin 2 ; Guo, Wei 2 ; Shi, Liang 1 ; Wu, 1 ;

作者机构： 1.Nanjing Agr Univ, Natl Joint Local Engn Res Ctr Rural Land Resource, Jiangsu Collaborat Innovat Ctr Solid OrganicWaste, Coll Life Sci, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Germplasm Resources & Biotechnol, Jiangsu Prov Infrastruct Conservat & Utilizat Agr, Prov Key Lab Agrobiol, Nanjing 210014, Peoples R China

关键词： Accumulation; Copper; Zinc; Phenotypic variation; QTL

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2021 年 28 卷 12 期

页码：

收录情况： SCI

摘要： Excess trace metals may cause damage to human health due to the consumption of food grain grown in contaminated soils. This study was designed to understand the genetic mechanisms of copper (Cu) and zinc (Zn) accumulation in wheat grain under stressed environments. The differences of Cu/Zn contents in the grain among 246 wheat varieties were analyzed, and the wheat varieties with low or high accumulation of Cu and Zn in the safe range were also screened out. The accumulation of Cu and Zn in grains of "Chushanbao" was lowest, which could be used as a novel germplasm for wheat breeding under heavy metal stress. We found that Cu contents of wheat grain were significantly and positively correlated with Zn. The quantitative trait loci (QTLs) for grain Cu content (GCuC) and grain Zn content (GZnC) were detected by genome-wide association study (GWAS). Twenty-three loci affecting GCuC were identified on chromosomes 1A, 1D, 2A, 2B, 2D, 3A, 3B, 3D, 4A, 4B 4D, 5A, 6D, 7A, and 7B, explaining 2.6-5.8% of the phenotypic variation. Sixteen loci associated with the GZnC on 11 different chromosomes 1B, 2B, 2D, 3A, 3D, 4A, 4B, 5A, 5D, 6B, and 7D were detected, which could explain 2.7 similar to 6.6% of phenotypic variance. We also determined five associated loci on chromosomes 2B, 2D, 3A, 4B, and 5A were in pleiotropic regions affecting both GCuC and GZnC. This study would help in better understanding the molecular basis of Cu/Zn accumulation in wheat grain, and the associated markers may be useful for marker-assisted selection (MAS) breeding program.

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