黄瓜瓜长性状的QTL定位分析

QTL Analysis for Fruit Length of Cucumber

以黄瓜野生变种PI183967(Cucumis sativus L.hardwickii)和新泰密刺选系931为亲本获得的包含179个单株的F2群体为作图群体,构建了一张包含234个SSR标记、7个连锁群(分别对应黄瓜的7条染色体)的黄瓜遗传图谱,该图谱覆盖基因组长度829.7cM,平均图距3.5cM。结合F2和F3的表型数据,共检测到5个瓜长QTL,分布在第1、4、6号染色体上,贡献率在7.1%～14.1%之间。

A cucumber（Cucumis sativus L.）genetic map,based on SSR（simple sequence repeat） newly developed from cucumber genome,was constructed with a population consisting of 179 F2 individuals from a cross of PI183967 and Northern Chinese type inbred line 931. The map includes 234 SSR markers in seven linkage groups spanned 829.7 cM. The map density was 3.5 cM/marker. On the basis of this SSR genetic map,quantitative trait loci（QTL）associated with cucumber fruit-length trait was detected among F2 population and F2：3 families. Two QTLs were detected in F2 population and three QTLs in F2：3 families. The five QTLs were distributed in Chromosome 1,4 and 6,and the variation was ranged from 7.1 %-14.1 %.