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水稻千粒重QTL定位分析

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以粳稻南粳35和籼稻N22杂交得到的F2群体为研究对象,通过构建遗传连锁图谱,对控制水稻千粒重的QTL进行定位.结果表明,千粒重在F2群体中呈正态分布,表现为数量性状特征;利用Win QTLcart 2.5软件共检测到3个控制千粒重的QTL,分别位于第3和第6染色体上,其中第3染色体检测到2个QTL,qTGW3a、qTGW3b和qTGW6分别解释千粒重表型变异的15.03％、17.65％和7.87％,qTGW3a增加千粒重的基因来自南粳35,qTGW3b和qTGW6的增效基因来自籼稻品种N22;3个位点基因的作用方式均为加性,在育种中应用潜力较大.
QTL Mapping of 1000-Grain Weight in Rice
The F2 population derived from a cross between Nanjing35 and N22 as the research object,the QTL controlling 1000-grain weight were mapped through the construction of a genetic linkage map.The results showed that 1000-grain weight exhibited a normal continuous distribution in F2 population,indicating that was quantitative traits controlled by multiple genes.Three putative QTL was identified on chromosomes 3 and 6 using WinQTL-cart2.5,two QTL were detected in chromosome 3.qTGW3a,qTGW3b and qTGW6explained 15.03％,17.65％ and 7.87％ of the observed phenotypic variance,respectively,qTGW3a had the alleles contributing to positive effect which were derived from Nanjing35 while qTGW3b and qTGW6 alleles from N22.The modes of gene action were mainly additive in our study.

Rice1000-grain weightQTL mapping

马孟莉、刘艳红、雷恩、李春燕、苏一兰、卢丙越

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红河学院生命科学与技术学院/云南省高校农作物优质高效栽培与安全控制重点实验室,661100,云南蒙自

水稻 千粒重 QTL定位

云南省应用基础研究计划项目云南省教育厅科学研究基金红河学院中青年学术骨干培养计划

2013FZ1242013Y0662014GG0101

2015

10.16035/j.issn.1001-7283.2015.01.008

作物杂志
中国作物学会 中国农科院作物科学研究所

作物杂志

CSTPCD北大核心
影响因子：0.821
ISSN：1001-7283
年,卷(期)：2015.(1)
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