| 基于SSSL群体的玉米穗下节间长QTL分析 |
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| 基金项目： | This study was supported by the National Natural Science Foundation of China (U1604231), the Major Science and Technology Projects in Henan Province (161100110500), and Henan Science and Technology Project (152102110060). |
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| 摘 要： |
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| 收稿时间： | 2017-06-14 |
QTL Analysis of Under-ear Internode Length Based on SSSL Population |
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| Authors: | Hai-Ping GUO Gao-Yang SUN Xiao-Xiang ZHANG Peng-Shuai YAN Kun LIU Hui-Ling XIE Ji-Hua TANG Dong DING Wei-Hua LI |
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| Institution: | 1.College of Agronomy, Henan Agricultural University / Key Laboratory of Wheat and Maize Crops Science, Zhengzhou 450002, Henan, China;2.Maize Research Institute of Sichuan Agricultural University, Chengdu 611130, Sichuan, China |
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| Abstract: | The under-ear internode length determines maize plant height and ear height, which are two agronomic traits associated with yield and lodging resistance. The lengths of the 7th, 8th, and 9th internode play a decisive role in ear height. Compared with other agronomic traits, there is little knowledge for genetic basis of under-ear internode length. Thus, exploring the genetic basis of internode length plays an important role in maize breeding. In this study, a set of 260 chromosome segment substitution lines (CSSLs), using Chang 7-2 as the donor parent and lx9801 as recipient parent, was constructed and used to map QTLs for the 7th, 8th, and 9th internode length and ear height at two-environments in two years. In total, 18, 23, and 17 QTLs were detected for the 7th, 8th, and 9th internode length, respectively. Among them, eight QTLs were simultaneously detected for the 7th, 8th, and 9th internode length. For ear height, 20 QTLs were detected, 12 (60%) of these 20 QTLs were found to co-localize to the 7th, 8th, and 9th internode length. The results indicated that length of the 7th, 8th, and 9th internode and ear height have same genetic basis. Furthermore, length of the 7th, 8th, and 9th internode are important components of ear height and also determining the plant height and ear height in maize. |
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| Keywords: | maize single segment substitution lines (SSSL) under-ear internode length ear height quantitative trait loci (QTL) |
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