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Quantitative trait loci mapping for yield components and kernel-related traits in multiple connected RIL populations in maize

文献类型： 外文期刊

作者： Li, Chunhui 1 ; Li, Yongxiang 1 ; Sun, Baocheng 2 ; Peng, Bo 1 ; Liu, Cheng 3 ; Liu, Zhizhai 1 ; Yang, Zhaozhao 1 ; Li, Q 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Food Crops, Urumqi 830000, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Food Crops, Ur

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

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收录情况： SCI

摘要： Grain yield is one of the most important and complex quantitative traits in maize breeding. In the present study, a total of 11 connected RIL populations, derived from crosses between elite inbreed "Huangzaosi" as the common parent and 11 elite inbreeds, were evaluated for five yield components and kernel-related traits under six environments. Quantitative trait loci (QTL) were detected for the traits under each environment and in joint analysis across all environments for each population. A total of 146 major QTL with R-2 > 10 % in at least one environment and also detected based on joint analysis across all environments were identified in the 11 populations. Lqkwei4 conferring kernel weight and Lqklen4-1 conferring kernel length both located in the adjacent marker intervals in bin 4.05 were stably expressed in four environments and in joint analysis across six environments, with the largest R-2 over 27 and 24 % in a single environment, respectively. Moreover, all major QTL detected in the 11 populations were aligned on the IBM2 2008 neighbors reference map. Totally 16 common QTL (CQTL) were detected. Seven important CQTL (CQTL1-2, CQTL1-3, CQTL4-1, CQTL4-2, CQTL4-3, CQTL4-4, and CQTL6-1) were located in bin 1.07, 1.10, 4.03, 4.05, 4.08, 4.09 and 6.01-6.02, respectively. These chromosomal regions could be targets for fine mapping and marker-assisted selection.

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