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Molecular mapping of quantitative trait loci for grain moisture at harvest in maize

文献类型： 外文期刊

作者： Song, Wei 1 ; Shi, Zi 1 ; Xing, Jinfeng 1 ; Duan, Minxiao 1 ; Su, Aiguo 1 ; Li, Chunhui 1 ; Zhang, Ruyang 2 ; Zhao, Yanxi 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Key Lab Maize DNA Fingerprinting & Mol Br, Maize Res Ctr, Shuguang Garden Middle Rd 9, Beijing 100097, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Key Lab Maize DNA

关键词： grain moisture;QTL mapping;SNP;maize

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

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收录情况： SCI

摘要： In maize, high grain moisture (GM) at harvest causes problems in harvesting, threshing, artificial drying, storage, transportation and processing. Understanding the genetic basis of GM will be useful for breeding low-GM varieties. A quantitative genetics approach was used to identify quantitative trait loci (QTL) related to GM at harvest in field-grown maize. The GM of a double haploid population consisting of 240 lines derived from Xianyu335 was evaluated in three planting seasons and a high-density genetic linkage map covering 1546.4cM was constructed. The broad-sense heritability of GM at harvest was 71.0%. Using composite interval mapping, six QTL for GM at harvest were identified on five chromosomes (Chr). Two QTL located on Chr1, qgm1-1 and qgm1-2, explained 5.0% and 10.8% of the phenotypic variation in GM at harvest, respectively. The QTL qgm2, qgm3, qgm4 and qgm5 accounted for 3.3%, 8.3%, 5.4% and 11.0% of the mean phenotypic variation, respectively. Because of their consistent detection over multiple planting seasons, the detected QTL appear to be robust and reliable for the breeding of low-GM varieties.

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