应用RFLP图谱定位分析稻米粒形的QTL

研究利用Asominori/IR2 4 的 71份重组自交系群体及其相应的具有 2 93个分子标记的RFLP图谱 ,采用单因子方差分析和区间做图方法 ,对控制主要稻米粒形性状的数量性状位点(QTL)进行了系统分析。检测出 9个控制稻米粒形的QTL ,其中包括 3个控制稻米粒长的QTL(R11、R12和R13) ,2个控制稻米粒宽的QTL(Rwl和Rw2 ) ,4个控制长宽比的QTL(Lw1、Lw2、Lw3和Lw4 )。研究认为 ,粒长是受多基因控制 ,粒宽受两对主效基因和多对微效基因控制的数量性状 ,粒长和粒宽是遗传上完全独立的两个性状

Analysis QTL of Grain Shape by Using of RFLP Map in Rice

Through QTL(Quantitative trait loci)affecting main rice quality characters and indica-japonica differentiation were analyzed by using of a recombinant inbred (RI)lines derived from a cross of Asominori×IR 24 and its RFLP map wity 293 molecular markers by single marker analysis and interval mapping.Nine QTLs for grain shape traits were detected in this population,three of them(R11,R12 and R13)were that controlled grain length ,two(Rw1 and Rw2)controlled grain width,four(Lw1,Lw2,Lw3 and Lw4)controlled grain length/width.It were indicated that grain length were affected multi-gene,grain width were affected two main-effective genes and some mini-effective genes,grain length and grain width were quantitative traits.Grain length and grain width were independent inherit traits.