玉米杂交种主要农艺性状的灰色关联度分析

应用灰色关联度分析方法,对四川省玉米杂交种主要农艺性状间(生育期、株高、穗位高、除倒伏、穗长、穗行数、行粒数、百粒重、出籽率、单穗粒重)的相关性进行了分析.结果表明:与玉米杂交种产量最为相关的性状是单穗粒重,其后依次是除倒伏、穗位高、生育期、株高、穗长、百粒重、穗行数、出籽率和行粒数.根据玉米主要农艺性状间的关系,对产量影响最大的经济性状-单穗粒重与株高、穗位高、穗行数和穗长关系最为密切;对产量影响较大的农艺性状-除倒伏与穗位高和穗长关系密切.说明在四川省选育玉米杂交种时,在保证适当的株高和穗位高的前提下,要注重选育单穗粒重高,抗倒,生育期适当偏长,百粒重较高的长穗、多行型品种;同时不要忽略对品种的出籽率和行粒数的选择.

Grey correlation degree analysis on yield and main agronomic characters of maize hybrid

The correlation of main agronomic characters of corn in Sichuan was studied with the analysis of grey correlation degree.The agronomic characters studied in this paper included growing period,plant height,ear height,lodging resistance,ear length,rows per ear,kernel per row,100-grain weight,kernel rate and grain weight per plant,The results showed that the magnitude on effects of vary characters on the yield in turn was grain weight per plant,lodging resistance,ear height,growing period,plant height,ear length,100-grain weight,kernel rate,rows per ear kernel per row and kernel per row.Analysis on the correlation degree of maize agronomic characters indicated that yield was influenced mainly by economic characters such as grain weight per plant,plant height,ear height,rows per era and era length,agronomic characters such as lodging resistance,ear height and ear length et al.It indicated that in the course of breeding in Sichuan province,we should pay attention to the selection of maize hybrid with higher grain weight per plant,good lodging resistance,longer growing period,higher 100-grain weight,lengthier ear and more rows per ear;But we shouldn't ignore the selection of kernel rate and kernel per ear.