美国BSSS玉米群体农艺性状分析

Analysis of agronomic characters in American BSSS maize populations

对美国BSSS玉米群体中150个单株的株高、穗位高、雄穗长、茎粗、穗上叶数等性状及其与穗粒重的关系进行了相关分析。各性状均分离出优于对照自交系478的群体单株,其中穗粒重优于对照的占78.27%。选择到各性状均优于对照的群体单株18株。穗位高对单株产量的直接作用为较大正效应,穗位高通过株高对单株产量的间接作用为较大正效应,雄穗长对单株产量的直接作用为负效应。因此,在BSSS玉米群体中选择穗位适当偏高,雄穗适当偏短的单株自交,更有可能得到单株产量高的后代。

The relation between plant height,ear height,stamen length,stem diameter,leaf number above the ear and grain weight in 150 individuals of American BSSS maize populations was analyzed.Inbred lines 478 was used as a control line,individuals with each character superior to control line were found out and among them individuals with higher grain weight than the control accounted for 78.27%.There were 18 individuals whose all characters were superior to control line.The direct effect of ear height on yield per plant was greater positive effect.The indirect effect of ear height on yield per plant was greater positive effect.The effect of stamen length on yield per plant was negative effect.The results indicated that it was a potential way to get a progeny with high yield though self-bred of individuals with appropriate higher ear and appropriate shorter stamen.