河南农业科学2013，Vol.42Issue(5)：33-37,48,6.
优良玉米杂交种植株性状杂种优势及其与亲本自交系的相关分析
Heterosis of Plant Characters for Elite Maize Hybrids and Their Correlations with Parent Lines
摘要
Abstract
In this study,seven excellent maize hybrids and their 13 parent lines were studied for 13 plant traits,including plant height,ear height,top height,top height/plant height,tassel length,tassel branch number,leaves above ear,leaf angle,leaf orientation value,leaf area,aerial root layers,first layer aerial roots and stem diameter.The mid-parent heterosis (MH),over-high parent heterosis (HH) of all hybrids,and the correlations of hybrid with its two parent lines were analyzed for all traits.The results showed that great differences existed among hybrids and parent lines for all traits.MH and HH were greatly different among different hybrids for the same trait and among different traits for the same hybrid.The heteroses of plant height,ear height,top height,tassel length,tassel branch number,the leaves above ear,leaf angle,leaf area and stem diameter were high,but the heteroses of top height/plant height,leaf orientation value,aerial roots layers,first layer aerial roots were low.Significant positive correlations were found between hybrid and its male parent line for top height,top height/plant height,leaves above ear,between hybrid and its female parent line for tassel length and leaf area,and between hybrid and midparent value for top height,tassel branches,leaf angle,and leaf area.This result could provide useful information for cross-making in the improvement of plant traits in maize breeding.关键词
玉米/杂交种/亲本自交系/植株性状/杂种优势/相关分析Key words
maize/ hybrids/ parent line/ plant traits/ heterosis/ correlation analysis分类
农业科技引用本文复制引用
梁晓杰,董永彬,张飞飞,李玉玲..优良玉米杂交种植株性状杂种优势及其与亲本自交系的相关分析[J].河南农业科学,2013,42(5):33-37,48,6.基金项目
河南省产业技术体系玉米遗传育种岗位专家项目(S2010-02-G01) （S2010-02-G01）
