稻米直链淀粉含量和胶稠度对高温耐性的QTL分析  

Identifying QTLs for Thermo-Tolerance of Amylose Content and Gel Consistency in Rice

作　　者：朱昌兰[1] 江玲[1] 张文伟[1] 王春明[1] 翟虎渠[2] 万建民[1] 

机构地区：[1]南京农业大学作物遗传与种质创新国家重点实验室 [2]中国农业科学院作物科学研究所,北京100081

出　　处：《中国水稻科学》2006年第3期248-252,共5页Chinese Journal of Rice Science

基　　金：国家863计划资助项目;国家973计划资助项目(2004CB117204);国家自然科学基金资助项目(30500315);长江学者和创新团队发展计划资助项目

摘　　要：利用由98个家系组成的Nipponbare/Kasalath//Nipponbare回交重组自交系群体,以直链淀粉含量耐热指数(高温下直链淀粉含量/适温下直链淀粉含量×100)和胶稠度耐热指数(高温下胶稠度/适温下胶稠度×100)为评价指标,采用混合线性模型的QTL定位方法,在南昌和南京两个试验地点对水稻蒸煮食用品质性状的高温耐性QTL进行了检测。两个性状在两个试验地点共检测到9个QTLs,其中直链淀粉含量高温耐性QTL3个,胶稠度高温耐性QTL6个。两个性状中共有3个QTLs在两个地点同时被检测到。其中位于第6染色体上与Wx基因相同的染色体区域和第8染色体G1073-R727区域分别是控制直链淀粉含量和胶稠度高温耐性的重要区域。A mapping population of 98 backcross inbred lines （BILs） derived from a backcross, Nipponbare/Kasalath// Nipponbare, was used to identify the quantitative trait loci（QTL） conferring the thermo tolerance of amylose content and gel consistency in rice by mixed linear model approaches. A total of nine QTLs including three QTLs for thermo-tolerance of amylose content and six QTLs for thermo-tolerance of gel consistency were detected in Nanchang and Nanjing, respectively. Three QTLs for these two traits were common in the two experimental locations. The same region as Wx locus on chromosome 6 and interval of G1073-R727 on chromosome 8 were important regions for the thermo-tolerance of amylose content and gel consistency respectively.

关 键 词：稻米 直链淀粉含量 胶稠度 高温耐性 数量性状基因座位 

分 类 号：S511[农业科学—作物学]