Molecular mapping of quantitative trait loci for three kernel-related traits in maize using a double haploid population
文献类型: 外文期刊
第一作者: Shi, Zi
作者: Shi, Zi;Song, Wei;Xing, Jinfeng;Duan, Minxiao;Wang, Fengge;Tian, Hongli;Xu, Liwen;Wang, Shuaishuai;Su, Aiguo;Li, Chunhui;Zhang, Ruyang;Zhao, Yanxin;Luo, Meijie;Wang, Jidong;Zhao, Jiuran
作者机构:
关键词: Kernel-related traits;QTL mapping;SNP;Maize
期刊名称:MOLECULAR BREEDING ( 影响因子:2.589; 五年影响因子:2.75 )
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年卷期:
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收录情况: SCI
摘要: Kernel size and kernel weight are important factors possibly involved in the determination of grain yield in maize, so identifying the genetic basis of kernel-related traits provides insights into the breeding of high-yield maize varieties. Kernel length (KL), kernel width (KW) and hundred kernel weight (HKW) were evaluated in three various planting conditions for the 240 field-grown double haploid (DH) lines derived from the single-cross hybrid Xianyu335. Variations in KL, KW and HKW were observed among DH lines, and all three traits showed a broad sense heritability of 76%. A total of 964 single nucleotide polymorphisms (SNPs) from the MaizeSNP3072 chip was utilised to create a high-density genetic map of 1546.4 cM and to identify quantitative trait loci (QTLs). Using composite interval mapping, a total of five, seven and five QTLs have been mapped for KL, KW and HKW, respectively. qkl1-2 and qkl4-1 explained 17.8% and 14.2% of the phenotypic variation in KL, respectively, and the other three QTLs contributed 3.2-4.0%. The phenotypic variation explained (PVE) of seven QTLs responsible for KW ranged from 3.3 to 9.5%. Three QTLs for HKW, qhkw1, qhkw5 and qhkw10 each explained more than 10% of the phenotypic variation, and qhkw4 and qhkw9 accounted for 3.0% and 6.0%, respectively. Due to their detection in multiple planting environments, the loci mapped here appear to be potential targets for the improvement of maize grain yield.
分类号: Q94
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