水稻单片段代换系抽穗期QTL鉴定及遗传分析  

QTL Identification and Genetic Analysis of Heading Date in Single Segment Substitution Lines

作　　者：杨雷[1] 柳絮[2] 吴振映[1] 王文英[2] 姚方印[2] 刘开启[1] 

机构地区：[1]仲恺农业工程学院,广东广州510225 [2]山东省农业科学院高新技术研究中心,山东济南250100

出　　处：《山东农业科学》2011年第5期4-7,共4页Shandong Agricultural Sciences

基　　金：国家"863"计划项目"植物分子与细胞高效育种与品种创制"(2006AA1001101)

摘　　要：适宜的抽穗期是水稻(Oryza sativa)获得理想产量的前提。本研究利用带有晚抽穗基因的单片段代换系(SSSL)为供体,华粳籼74为受体亲本,发展F2次级分离群体。通过t测验比较单片段代换系与受体亲本华粳籼74之间抽穗期的差异,同时对代换片段上的抽穗期QTL进行鉴定。以P≤10-6为阈值鉴定出抽穗期QTL,此QTL位于水稻的第6染色体。调查记录F2次级分离群体单株抽穗期,并对统计结果进行卡方(χ2)测验。结果显示,F1代单株表现为早抽穗,F2代早抽穗和迟抽穗植株数符合3∶1的分离比,早抽穗表现为显性。Suitable heading date（HD） is the premise for rice to obtain the ideal yield.In this study,the single segment substitution lines（SSSLs） with late heading gene and Huajingxian 74 were used to develop the F2 segregating population.The differences in heading date between SSSLs and Huajingxian 74 were analyzed by t test and the QTLs of heading date were identified,too.The QTL was in the sixth chromosome identified with the threshold of P≤10-6.The investigation results indicated that the F1 population showed early heading,while the ratio of early heading plants to late heading plants was in accordance with 3∶1 in F2 population,so the early heading trait was controlled by one major dominant gene.

关 键 词：水稻 抽穗期 QTL鉴定 单片段代换系 遗传分析 

分 类 号：S511.035.3[农业科学—作物学]