Grey correlation degree analysis of yield and main agronomic characters of maize hybrid in Sichuan province.

The correlation of main agronomic characters of corn in Sichuan was studied with the analysis of grey correlation degree.The agronomic characters that were 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.