甜玉米穗位叶面积QTL定位  

QTL Mapping of Ear Leaf Area in Sweet Corn

作　　者：张姿丽[1] 蒋锋[1] 刘鹏飞[1] 陈青春[1] 张媛[1] 王晓明[1] 

机构地区：[1]仲恺农业工程学院作物研究所,广州510225

出　　处：《湖北农业科学》2014年第7期1502-1505,共4页Hubei Agricultural Sciences

基　　金：国家公益性行业(农业)科研专项(201303008);广东省科技计划项目(2012B020301006)

摘　　要：选用穗位叶面积有显著差异的超甜玉米（Zea mays L.）自交系T4和T19为亲本配制杂交组合，以232个单株的F2群体为作图群体，构建了一张包含77个位点全长868.7 cM的玉米SSR标记遗传连锁图谱，标记间的平均间距为11.28 cM。在F2群体中用复合区间作图法在玉米全基因组上检测穗位叶面积QTL，共检测到4个与甜玉米穗位叶面积相关QTL，分别位于玉米第4、5、9染色体上，可解释5.98%~11.12%的表型变异。这一结果将加快高产、耐密和抗倒伏甜玉米育种进程，实现玉米的分子标记辅助选择育种。Cross was made between two sweet corn inbreds （T19 and T4﹚ significantly different in ELA （ear leaf area﹚. A genetic linkage map of 868.7 cM length was constructed with 77 SSR markers based on a sweet corn population consisting of 232 F2 individuals from the cross T4＆#215;T19, with an average interval length of 11.28 cM. 4 QTLs of ELA on chromosome 4, 5 and 9 were detected with composite interval mapping （CIM﹚. The phenotypic variance explained by each QTL was ranged from 5.98% to 11.12%. The QTL of ELA from this study may improve the breeding of high yield, density and realized lodging resistance and molecular marker-assisted selection（MAS of ELA﹚.

关 键 词：甜玉米(Zea mays L ) 叶面积 复合区间作图 QTL 

分 类 号：S513[农业科学—作物学] Q789[生物学—分子生物学]