小麦粒长粒宽和粒重相关性状的QTL定位分析

Mapping of QTL Underlying Grain Weight in Wheat

以国际小麦作图组织的重组自交系群体W7984×Opata85为材料,利用QTL作图软件Win QTLCart 2.5和基于混合线性模型的复合区间作图方法,对其2002年和2005年收获的亲本和114个株系种子中控制小麦粒长、粒宽及粒重的QTL进行定位,共检测到8个与小麦粒长相关的QTL,1与个小麦粒宽相关的QTL和7个与小麦粒重相关的QTL,分别位于2B,3A,5B,5A,7D,4A和3B染色体上。其中,位于3B染色体的QTL贡献最大,可以解释粒长变异的19%。

In this study, a recombinant inbred line population W7984 international wheat mapping organization ~ Opata85 as material, the use of QTL drawing software WinQTLCart 2.5 and composite interval mapping method based on mixed linear model, grain length, grain width and grain weight of QTL control to the location of the 2002 and 2005 harvest parents and 114 strains of seed, 8 and wheat grain length related QTL are detected, 1 and a small grain width of QTL and 7 weight associates with wheat grain QTL, located at 2B, 3A, 5B, 5A, 7D, 4A and 3B chromosomes. The contribution of the QTL chromosome 3B maximum, can explain 19% of variation of grain length.