华北农学报Issue(1)：9-14,6.DOI:10.7668/hbnxb.2015.01.002
两种磷水平下玉米产量性状的变化及其QTL定位
Characterization and QTL Mapping of Yield Trait under Two Phosphorus Regimes in Maize
摘要
Abstract
To study the impact of phosphorus deficiency on maize yield ,a RIL ( recombination inbred lines ) population was used for characterization of yield and its component under phosphorus deficiency and normal condi -tion,and the resulting QTL mapping was also conducted by composite interval mapping .The results indicated that grain yield per plant ,ear weight and cow weight were significantly impacted by low phosphorus stress ,while kernel ratio,ear rows,kernel depth were less impacted by low phosphorus stress based on low phosphorus tolerance index ( LPTI) .Path analysis revealed that kernels per row was the main reason for yield decreasing ,then followed by hun-dred kernel weight ,kernel depth ,and row number per ear .A total of 23 QTL were detected under two phosphorus levels.Each of these QTL could explain 4.32% to 14.77% phenotypic variation .Multiple QTL of different traits were co-localized on two chromosome regions covered by bnlg 666-umc1141 and umc1108-bnlg1258 ,respective-ly.These QTL provide useful information for improving tolerance of low phosphorus in maize .关键词
玉米/低磷胁迫/产量/通径分析/QTLKey words
Maize/Low phosphorus stress/Yield/Path analysis/QTL分类
农业科技引用本文复制引用
任志勇,苏顺宗,张素芝,刘海岚,罗博文,刘丹,吴玲,荣廷昭,高世斌..两种磷水平下玉米产量性状的变化及其QTL定位[J].华北农学报,2015,(1):9-14,6.基金项目
国家自然科学基金项目（31361140364；31171566）；农业部“948”计划项目 （）
