不同玉米品种相关农艺性状与产量的通径分析

The Path Analysis Agronomic Character and Yield in Different Maize Varieties

采用随机区组试验设计,以30个不同产量水平玉米品种为试材,将产量与11个主要农艺性状进行相关分析和通径分析。相关分析表明:产量与穗粗、穗行数、出籽率呈极显著正相关;与株高呈显著正相关;与空秆率和倒伏率呈极显著负相关。通径分析结果表明:主要农艺性状对产量的直接绝对作用大小依次为倒伏率>空秆率>出籽率>株高>穗位高>穗行数>穗粗>百粒重>秃尖长>生育期>穗长,其中出籽率、株高、穗粗、百粒重、生育期为正向作用,倒伏率、空秆率、秃尖长、穗行数、穗位高和穗长为负向作用。在高产玉米品种选育中应增强抗倒性、降低空秆率、提高出籽率。适当增加百粒重和穗粗,降低穗位高。

Thirty maize hybrids in different yield level as the materials in the study. The correlation and path relationship about yield and eleven agronomic characters were made by randomized block design. The correla- tion analysis indicated that yield and ear diameter, ear row number, seeding rate was significant positive rela- tionship at 0.01 level, about plant height was significant positive relationship at 0.05 level, empty bar rate and lodging rate were significant negative relationship at O. O1 level. The path analysis result indicated that the main agronomic characters and yield direct relationship was lodging rate 〉 empty bar rate 〉 seeding rate 〉 plant height 〉 ear height 〉 ear diameter 〉 100-kernels weight 〉 growth period 〉 ear length, seeding rate, plant height, ear diameter, 100-kernels weight and growth period were positive intention, lodging rate, empty bar increase lodging, seeding rate, 100-kernels weight and ear diameter , reduce empty bar rate and ear height in the maize varie- ties.