【摘要】 利用由 191个家系组成的密阳 2 3/秋光重组自交家系 (recombinantinbredlines,RIL)F10 代群体 ,进行种子休眠性数量性状基因座 (quantitativetraitlocus,QTL)的检测和遗传效应分析。以抽穗后 35d的种子发芽率作为种子休眠性的表型值 ,分析亲本和 191个RIL的休眠性表现。通过WinQTLCart软件分析 ,检测到分别位于第 5和第 8染色体上的 2个水稻种子休眠性QTL ,其中位于第 8染色体上QTL的加性效应为负值 ,表明该休眠性基因位点来源于亲本秋光 ;第 5染色体上QTL的加性效应为正值 ,表明该休眠性减效基因来源于亲本密阳 2 3。更多还原

【Abstract】 A mapping population consisting of 191 lines,derived from a recombinant inbred lines of Miyang 23/Akihikari by single seed descend methods,was used to detect quantitative trait locus(QTL) for seed dormancy in rice.Two QTLs controlling seed dormancy were detected significantly on chromosomes 5 and 8 by composite interval mapping.The additive effects of QTL on chromosome 8 was negative which indicated that this locus came from Akihikari,while QTL on chromosome 5 came from Miyang 23.更多还原