Genome-wide association mapping of starch granule size distribution in common wheat

文献类型： 外文期刊

第一作者： Li, Jieyun

作者： Li, Jieyun;Rasheed, Awais;Guo, Qi;Dong, Yan;Liu, Jindong;Xia, Xianchun;Zhang, Yan;He, Zhonghu;Rasheed, Awais;He, Zhonghu

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关键词： 90K SNP assay;GWAS;SG;Triticum aestivum

期刊名称：JOURNAL OF CEREAL SCIENCE （ 影响因子：3.616； 五年影响因子：3.891 ）

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收录情况： SCI

摘要： AbstractStarch is a crucial component in wheat endosperm and plays an important role in processing quality. Endosperm of matured wheat grains contains two distinct starch granules (SG), referred to as larger A- and smaller B-granules. In the present study, 166 Chinese bread wheat cultivars planted in four environments were characterized for variation in SG size. A genome-wide association study (GWAS) using the 90?K SNP assay identified 23 loci for percentage volumes of A- and B-granules, and 25 loci for the ratio of A-/B-granules volumes, distributing on 15 chromosomes. Fifteen MTAs were associated with both the percentage volumes of A-, B-granules and the ratio of A-/B-granules volumes. MTAsIWB34623andIWA3693on chromosome 7A andIWB22624andIWA4574on chromosome 7B associated with the percentage volumes of A- and B-granules consistently identified in multiple environments were considered to be stable. Linear regression analysis showed a significantly negative correlation of the number of favorable alleles with the percentage volumes of A-granules and a significantly positive correlation between the number of favorable alleles and the percentage volumes of B-granules, respectively. The loci identified in this study and associated markers could provide basis for manipulating SG size to obtain superior noodle quality in wheat.Highlights?A GWAS identified 23 loci for percentage volumes of A- and B-granules, and 25 loci for the ratio of A-/B-granules volumes.?Fifteen MTAs were associated with both the percentage volumes of A-, B-granules and the ratio of A-/B-granules volumes.?MTAsIWB34623,IWA3693,IWB22624andIWA4574associated with the percentage volumes of A- and B-granules were stable.?The loci identified in this study and associated markers is helpful to obtain superior noodle quality in wheat.]]>

分类号： S5

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