控制水稻穗伸出度和株高的数量性状基因定位  

Location of QTLs Controlling Panicle Exsertion and Plant-height in Rice

作　　者：肖珂[1] 左海龙[1] 巩迎军[1] 张俊芝[1] 张永娟[1] 董彦君[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《中国农学通报》2008年第5期95-99,共5页Chinese Agricultural Science Bulletin

基　　金：国家农业部948重大项目(No.2006-G1);国家航天育种工程项目(2006HT100013);上海市教委项目(06ZZ21);上海市科委项目(06PJ14074和075405117)

摘　　要：水稻穗伸出度和株高是影响杂交水稻制种产量的重要农艺性状。本研究利用越光/Kasalath//越光杂交回交产生的重组自交系群体(backcross recombinant inbred lines,BILs)对穗伸出度与其相关株高数量性状基因位点(QTL)进行检测和遗传效应分析。结果表明,对穗伸出度的检测中,共检测到4个QTL(qPE-1,qPE-2,qPE-3-1和qPE-3-2),分别位于水稻的第1,2,3(2个QTL)染色体上,其贡献率为6.62%～17.16%,其中位于第3染色体上的qPE-3-2的贡献率为最大(17.16%),来自越光的等位基因能增长穗伸出度1.61cm;对株高性状的检测中,检测到QTL共有3个(qPH-1,qPH-6和qPH-12),分别位于第1、6和12染色体上,分别能解释28.53%,15.30%和5.01%的株高变异。有趣的是除了qPE-1位点,其他3个与穗伸出度相关的QTLs将不会影响水稻株高的生长。本研究中检测到QTLs的两侧的连锁分子标记可用于分子育种培育穗伸出度和株高兼顾型的水稻品种。Panicle exsertion, the distance between flag and panicle, and plant-height are important morphological traits with significant influence on hybrid seed production of rice. In this study, a set of 182 BILs from a backcross of Koshihikari （japoncia）/Kasalath （indica）//Koshihikari was used for analysis of quantitative trait loci （QTLs） controlling panicle exsertion and related plant-height in rice. A continuous variation and transgressive segregation were observed in this BIL population, which suggested that panicle exsertion was a quantitatively inherited trait. Four QTLs （qPE-1, qPE-2, qPE-3-1 and qPE-3-2） for the panicle exsertion were identified on chromosome 1, 2 and 3 （two QTLs）, which accounted for 6.62%-17.16% of the total variation, respectively. The most effective qPE-3-1 on chromosome 3 from Koshihikari increased 1.61cm length for panicle exsertion in rice. In addition, three QTLs （qPH-1, qPH-6 and qPH-12） for plant height in rice were detected on chromosome 1, 6 and 12, which explained 28.53%, 15.30% and 5.01% of the total variation, respectively. Interestingly, except qPE-1 on chromosome 1, the other three QTLs for panicle exsertion did not affect development of plant height in rice. The tightly linked molecular markers that flank the QTLs might be useful in improving panicle exsertion and plant height of rice.

关 键 词：水稻 穗伸出度 株高 数量性状基因位点 

分 类 号：Q348[生物学—遗传学]