辽宁省耐密玉米杂交种主要农艺性状的灰色关联分析

摘要

The influence of nine main agronomic characters on yield of 14 new varieties and CK in the corn regional test in Liaoning in 2009 was analyzed with gray-relation analysis. The results showed that the magnitude on effects of vary characters on the yield in turn was 100-kernels weight, ear length, ear height, kernel rate, plant height. 100-kernels weight and ear length were the key factor that change the yield of maize hybrid. It indicated that in the course of maize breeding, we should pay attention to the selection of ear height, kernel rate, plant height with suitable 100-kernels weight and ear length, and shouldnt ignore the selection of Barrenness.%应用灰色关联度分析方法,对2009年参加辽宁省中晚熟高密组玉米区域试验的15个玉米杂交组合的9个主要农艺性状进行分析.结果表明:各性状与产量的关联度大小为:百粒重＞穗长＞穗位高＞出籽率＞株高＞空秆率＞倒伏率＞秃尖长＞倒折率.百粒重、穗长、穗位高、出籽率、株高等因素与产量的关联度较高,与产量的关系较密切,对产量影响较大.百粒重和穗长是辽宁省中晚熟高密玉米杂交种选育的主要影响因素.在辽宁省选育中晚熟耐密玉米品种时,应在保证适当的百粒重和果穗长度的前提下,注重选育株高、穗位合理,出籽率高,空秆率低的品种.