基于水稻单片段代换系的粒形QTL定位  

QTL Detection for Rice Grain Shape Using Chromosome Single Segment Substitution Lines

作　　者：李生强 崔国昆 关成冉 王俊[1] 梁国华 

机构地区：[1]扬州大学江苏省植物功能基因组学重点实验室/植物功能基因组学教育部重点实验室,江苏扬州225009

出　　处：《中国水稻科学》2011年第2期163-168,共6页Chinese Journal of Rice Science

基　　金：国家973计划资助项目(2005CB120807)

摘　　要：粒形是重要的农艺性状,既影响水稻产量也影响稻米品质,是典型的数量性状,易受遗传背景和环境因素的影响。染色体单片段代换系降低了遗传背景的干扰,是鉴定QTL的新型遗传材料。利用单片段代换系为材料,共鉴定出了22个与粒形相关的QTL,包括7个粒长QTL,6个粒宽QTL,5个谷粒长宽比QTL和4个粒厚QTL,分布于除第6、91、1和12染色体外的8条染色体上。这些结果为粒形QTL的克隆和分子育种奠定了基础。Rice grain shape is one of the important factors affecting grain quality and yield but it is liable to be influenced by genetic background and environment.The chromosome single segment substitution lines（SSSLs） in rice have been considered as ideal populations to identify quantitative trait loci（QTLs）.Twenty-two QTLs affecting grain shape were detected and distributed on eight chromosomes except chromosomes 6,9,11 and 12 by using SSSLs.Among them,seven QTLs conditioned grain length,six conditioned grain width,five affected grain length-width ratio and four controlled grain thickness.The results supplied useful information for the QTL cloning and molecular breeding of rice grain shape.

关 键 词：水稻 单片段代换系 粒形 数量性状基因座 

分 类 号：S511[农业科学—作物学]