水稻千粒重QTL定位分析  

QTL Mapping of 1000- Grain Weight in Rice

作　　者：马孟莉[1] 刘艳红[1] 雷恩[1] 李春燕[1] 苏一兰[1] 卢丙越 

机构地区：[1]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,云南蒙自661100

出　　处：《作物杂志》2015年第1期43-45,共3页Crops

基　　金：云南省应用基础研究计划项目(2013FZ124);云南省教育厅科学研究基金项目(2013Y066);红河学院中青年学术骨干培养计划(2014GG0101)

摘　　要：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,q TGW3a、q TGW3 b和q TGW6分别解释千粒重表型变异的15.03%、17.65%和7.87%,q TGW3 a增加千粒重的基因来自南粳35,q TGW3 b和q TGW6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。The F2 population derived from a cross between Nanjing35 and N22 as the research object, the QTL con- trolling 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 qTGW6 explained 15.03%, 17.65% and 7.87% of the observed phenotypie 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.

关 键 词：水稻 千粒重 QTL定位 

分 类 号：S511[农业科学—作物学]