Mapping of quantitative trait loci for kernel row number in maize across seven environments

文献类型： 外文期刊

第一作者： Lu, Ming

作者： Lu, Ming;Xie, Chuan-Xiao;Li, Xin-Hai;Hao, Zhuan-Fang;Li, Ming-Shun;Weng, Jian-Feng;Zhang, De-Gui;Bai, Li;Zhang, Shi-Huang;Lu, Ming

作者机构：

关键词： simple sequence repeat locus: SSR locus;grain yield;genetic stability;phenotypic variance;kernel row number;plant diverse environment

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Genetic factors controlling quantitative inheritance of grain yield and its components have been intensively investigated during recent decades using diverse populations in maize (Zea mays L.). Notwithstanding this, quantitative trait loci (QTL) for kernel row number (KRN) with large and consistent effect have not been identified. In this study, a linkage map of 150 simple sequence repeat (SSR) loci was constructed by using a population of 500 F2 individuals derived from a cross between elite inbreds Ye478 and Dan340. The linkage map spanned a total of 1478 cM with an average interval of 10.0 cM. A total of 397 F2:3 lines were evaluated across seven diverse environments for mapping QTL for KRN. Some QTL for grain yield and its components had previously been confirmed with this population across environments. A total of 13 QTL for KRN were identified, with each QTL explaining from 3.0 to 17.9% of phenotypic variance. The gene action for KRN was mainly additive to partial dominance. A large-effect QTL (qkrn7) with partial dominance effect accounting for 17.9% of the phenotypic variation for KRN was identified on chromosome 7 near marker umc1865 with consistent gene effect across seven diverse environments. This study has laid a foundation for map-based cloning of this major QTL and for developing molecular markers for marker-assisted selection of high KRN.

分类号： Q94

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