夏玉米主要农艺性状的多元回归与通径分析

采用DPS软件对株高、穗位高、生育期、穗长、穗粗、穗行数、行粒数、轴粗、穗粒重、出籽率和千粒重等11个主要农艺性状与玉米小区产量关系进行多元回归分析和通径分析。结果表明：株高、穗位高、穗粗、穗行数、行粒数、轴粗、出籽率和千粒重对玉米小区产量有显著效应，它们对小区产量的相对作用大小依次为千粒重〉穗行数〉株高〉穗粗〉轴粗〉穗位高〉行粒数〉出籽率．玉米小区产量与8个农艺性状有显著的线性关系。

Multiple Regression Analysis and Path analysis of the Main Agronomic Traits of Summer Maize

The relationship between main agronomic traits （plant height , ear position, growth period , ear length , ear diameter , row number of per ear , kernel number of per row , cod diameter, kernel weight per ear, grain production rate, 1000 kernels weight） and yield per plot of maize were studied with multiple regression and path analysis by using Statistica DPS3.01 software.. The results indicated that yield per plot was significantly correlated with plant height, ear position, ear length , ear diameter , row number of per ear , kernel number of per row , cod diameter, grain production rate,1000 kernels weight）. The relative importance of the eight agronomic traits correlated with yield per plot of maize was in order of 1000 kernels weight 〉 row number of per ear〉 plant height〉 ear diameter 〉cod diameter 〉 ear position〉 kernel number of per row 〉 grain production rate. The yield per plot of maize had significant linear relationship with the eight agronomic traits.