QTL mapping of yield-related traits in the wheat germplasm 3228

文献类型: 外文期刊

第一作者: Wang, Jiansheng

作者: Wang, Jiansheng;Liu, Weihua;Li, Lihui;Yang, Xinmin;Li, Xiuquan;Gao, Ainong;Wang, Jiansheng;Wang, Hui;Wu, Jun

作者机构:

关键词: Agropyron cristatum;Yield-related traits;QTL mapping

期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )

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年卷期:

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收录情况: SCI

摘要: The new wheat germplasm 3228, a putative derivative of tetraploid Agropyron cristatum Z559 and the common wheat Fukuhokomugi, has superior features in yield-related traits, particularly in spike morphological traits, such as large spike and superior grain number. To identify favorable alleles of these traits in 3228, 237 F-2:3 families were developed from the cross 3228/Jing 4839. A genetic map was constructed using 179 polymorphic SSR and EST-SSR markers. A total of 76 QTL controlling spike number per plant (SNP), spike length (SL), spikelet number per spike (SNS), floret number per spikelet (FNS), grain number per spike (GNS) and thousand-grain weight (TGW) were detected on 16 chromosomes. Each QTL explained 1.24-27.01% of the phenotypic variation, and 9 QTL (28.95%) were detected in two or all environments. Additive effects of 45 QTL were positive with 3228 alleles increasing the QTL effects, 31 QTL had negative effects indicating positive contributions from Jing 4839. Three important clusters involving all traits were located on chromosomes 5A, 6A and 4B, and several co-located QTL were also found. Most of the QTL detected on the three chromosome regions could contribute to the use of 3228 in breeding for grain yield improvement.

分类号: S3

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