小麦旗叶早衰性状的QTL定位

为小麦旗叶早衰性状的精细定位和基因克隆奠定基础,该试验以普通小麦(Triticum aestivum L.)‘宁春4号’和‘宁春27号’杂交得到的128个F10代RIL群体为研究材料,利用307对多态性SSR标记对小麦旗叶早衰性状进行了QTL定位,并通过构建整合图谱的方法进行了标记加密。结果表明,共检测到1个控制旗叶早衰性状的加性QTL,位于2A染色体长臂的gwm526和gwm382标记区间内,可解释49.88%的表型变异。经遗传图谱整合后发现,gwm526和gwm382标记之间存在124个SNP标记。

QTL Mapping for Early Aging of Flag Leaf in Wheat

In order to provide basis for fine mapping and gene cloning on early aging of flag leaf in wheat, we used 128 RILs from the cross of common wheat (Triticum aestivum L.) between Ningchun 4 and Ningchun 27 as the plant materials in our experiment. QTL mapping for early aging of flag leaf was done by using 307 polymorphic SSR markers and marker encryption was completed by building integration maps. An additive QTL for early aging of flag leaf was detected in flanking marker gwm526~gwm382 on chromosome 2AL, which explained 49.88% phenotypic variance. There were 124 SNP markers between gwm526 and gwm382 marker found by building integration maps.