Molecular mapping of quantitative trait loci for grain moisture at harvest in maize
文献类型: 外文期刊
第一作者: Song, Wei
作者: Song, Wei;Shi, Zi;Xing, Jinfeng;Duan, Minxiao;Su, Aiguo;Li, Chunhui;Zhang, Ruyang;Zhao, Yanxin;Luo, Meijie;Wang, Jidong;Zhao, Jiuran
作者机构:
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 )
ISSN:
年卷期:
页码:
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.
分类号: S3
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