| 基于染色体片段置换系对水稻粒形及千粒重QTL检测与稳定性分析 |
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| 引用本文： | 王小雷,李炜星,曾博虹,孙晓棠,欧阳林娟,陈小荣,贺浩华,朱昌兰. 基于染色体片段置换系对水稻粒形及千粒重QTL检测与稳定性分析[J]. 作物学报, 2020, 46(10): 1517-1525. DOI: 10.3724/SP.J.1006.2020.02008 |
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| 作者姓名： | 王小雷 李炜星 曾博虹 孙晓棠 欧阳林娟 陈小荣 贺浩华 朱昌兰 |
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| 作者单位： | 1. 江西农业大学作物生理生态与遗传育种教育部重点实验室/江西省超级稻工程技术研究中心;2. 江西省农业科学院/江西省超级水稻研究发展中心 |
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| 基金项目： | National Natural Science Foundation of China(31860373);National Major Project for Developing New GM Crops(2016-ZX08001-002);“5511” Superior Science and Technology Innovation Team Project of Jiangxi Province, China(2016-5BCB19005) |
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| 摘 要： | 粒形及千粒重是水稻产量的重要影响因素,通过挖掘这些性状的优异基因,对水稻超高产育种具有重要意义。本研究利用1套以籼稻恢复系昌恢121为背景亲本,粳稻越光为供体亲本构建的染色体片段代换系为材料,在3个环境下对水稻粒形及千粒重进行QTL检测及稳定性分析,共检测到59个QTL,分布于1号、2号、3号、4号、5号、6号、7号、10号、11号和12号染色体上,贡献率为0.77%～36.26%,其中发现10个QTL多效位点。值得关注的是qGW2-1、qGW2-2、qGW3-1、qGW3-2、qGL3和qGL12这6个QTL能在3个环境中重复检测到,其中qGW3-1为新鉴定的QTL位点。这些结果为进一步开展水稻粒形基因的精细定位、克隆和分子辅助育种奠定了一定的理论基础。
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| 关 键 词： | 水稻 染色体片段置换系 粒形 千粒重 数量性状座位 |
| 收稿时间： | 2020-02-13 |
QTL detection and stability analysis of rice grain shape and thousand-grain weight based on chromosome segment substitution lines |
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| WANG Xiao-Lei,LI Wei-Xing,ZENG Bo-Hong,SUN Xiao-Tang,OU-YANG Lin-Juan,CHEN Xiao-Rong,HE Hao-Hua,ZHU Chang-Lan. QTL detection and stability analysis of rice grain shape and thousand-grain weight based on chromosome segment substitution lines[J]. Acta Agronomica Sinica, 2020, 46(10): 1517-1525. DOI: 10.3724/SP.J.1006.2020.02008 |
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| Authors: | WANG Xiao-Lei LI Wei-Xing ZENG Bo-Hong SUN Xiao-Tang OU-YANG Lin-Juan CHEN Xiao-Rong HE Hao-Hua ZHU Chang-Lan |
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| Affiliation: | 1. Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education / Jiangxi Super Rice Engineering Technology Research Center, Nanchang 330045, Jiangxi, China;2. Jiangxi Super Rice Research and Development Center of Jiangxi Academy of Agricultural Sciences, Nanchang 330200, Jiangxi, China |
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| Abstract: | Grain shape and 1000-grain weight are the important factors affecting rice yield. Discovering the excellent genes of these traits is of great significance for super high yield rice breeding. In this study, a set of chromosome segment substitute lines (CSSLs), derived from a cross between Koshihikari (a japonica cultivar, as donor patent) and Changhui 121 (an indica restorer line, as a background patent), were used to quantitative trait locus (QTLs) detection and stability analysis in three environments. The results showed that a total of 59 QTLs were identified on chromosomes 1, 2, 3, 4, 5, 6, 7, 10, 11, and 12, respectively, whose contribution rate was 0.77%-36.26%. Among them, 10 pleiotropic QTLs were found, and qGW2-1, qGW2-2, qGW3-1, qGW3-2, qGL3, and qGL12 could all be detected in three environments. Furthermore, qGW3-1 is a novel identified QTL locus. These results lay a foundation for further fine mapping, cloning and marker-assisted breeding of grain shape genes. |
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| Keywords: | rice chromosome segment substitution lines (CSSLs) grain shape 1000-grain weight quantitative trait locus (QTL) |
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