Genetic analysis of leaf morphology underlying the plant density response by QTL mapping in maize (Zea mays L.)

文献类型： 外文期刊

第一作者： Ku, Lixia

作者： Ku, Lixia;Ren, Zhenzhen;Shi, Yong;Su, Huihui;Wang, Zhiyong;Li, Guohui;Wang, Xiaobo;Zhu, Yuguang;Zhou, Jinlong;Chen, Yanhui;Ku, Lixia;Ren, Zhenzhen;Shi, Yong;Su, Huihui;Wang, Zhiyong;Li, Guohui;Wang, Xiaobo;Zhu, Yuguang;Zhou, Jinlong;Chen, Yanhui;Chen, Xiao;Qi, Jianshuang;Zhang, Xin

作者机构：

关键词： Maize;RIL populations;Leaf morphology;QTL mapping

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： Maize yield increase has been strongly linked to plant population densities over time with changes in plant architecture, but the genetic basis for the plant architecture response to plant density is unknown, as is its stability across environments. To elucidate the genetic basis of the plant architecture response to density in maize, we mapped quantitative trait loci (QTLs) for leaf morphology-related traits in four sets of recombinant inbred line (RIL) populations under two plant density conditions. Forty-five QTLs for six traits were detected in both high and low plant density conditions. Thirty-seven QTLs were only detected when grown under high plant density, and 34 QTLs were only detected when grown under low plant density. Twenty-two meta-QTLs (mQTLs) were identified by meta-analysis, and mQTL1-1, mQTL3-2 and mQTL8 were identified when grown under high and low plant densities, with R-2 of some initial QTLs > 10 %, suggesting the mQTLs might be hot spots of the important QTLs for the related traits under planting density stress conditions. The results presented here provide useful information for further research and the marker-assisted selection of varieties targeting increased plant density and will help to reveal the molecular mechanisms related to leaf morphology in response to density.

分类号： Q94

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