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

被引:24
作者
Ku, Lixia [1 ,2 ]
Ren, Zhenzhen [1 ,2 ]
Chen, Xiao [3 ]
Shi, Yong [1 ,2 ]
Qi, Jianshuang [4 ]
Su, Huihui [1 ,2 ]
Wang, Zhiyong [1 ,2 ]
Li, Guohui [1 ,2 ]
Wang, Xiaobo [1 ,2 ]
Zhu, Yuguang [1 ,2 ]
Zhou, Jinlong [1 ,2 ]
Zhang, Xin [4 ]
Chen, Yanhui [1 ,2 ]
机构
[1] Henan Agr Univ, Coll Agron, Synerget Innovat Ctr Henan Grain Crops, 95 Wenhua Rd, Zhengzhou 450002, Peoples R China
[2] Henan Agr Univ, Natl Key Lab Wheat & Maize Crop Sci, 95 Wenhua Rd, Zhengzhou 450002, Peoples R China
[3] Henan Prov Seed Control Stn, 26 Shangdu Rd, Zhengzhou 450000, Henan, Peoples R China
[4] Henan Acad Agr Sci, Res Inst Food Crops, 116 Huayuan Rd, Zhengzhou 450002, Henan, Peoples R China
基金
中国国家自然科学基金;
关键词
Maize; RIL populations; Leaf morphology; QTL mapping; QUANTITATIVE TRAIT LOCI; GENOME-WIDE ASSOCIATION; NITROGEN USE EFFICIENCY; GRAIN-YIELD; WATERLOGGING TOLERANCE; LENGTH-POLYMORPHISMS; AGRONOMIC TRAITS; WATER REGIMES; IDENTIFICATION; ARCHITECTURE;
D O I
10.1007/s11032-016-0483-x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
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.
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页数:16
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