不同玉米种质材料植株与穗粒性状的灰色关联度分析

为了掌握生产上广泛使用的12个玉米单交种的主要农艺性状间的关系,对被测试材料的植株、穗粒、产量以及品质性状进行了灰色关联度分析。结果表明：与产量密切相关的植株与穗粒性状是出籽率、行粒数、穗粗、穗粒重、百粒重等,其关联度在0.4353~0.3327。与粗蛋白、粗脂肪、粗淀粉和赖氨酸含量等营养品质密切相关的植株与穗粒性状是出籽率、株高、穗长、轴粗、行粒数等,其关联度在0.5106~0.3929。综上所述,对于不同玉米种质材料进行遗传改良宜在保证正常生长的前提下,优先对出籽率、百粒重进行选择,还要注重对株高、穗长、轴粗、行粒数等性状的选择,进而提高育种效率。

Different Maize Germplasm Materials: Grey Correlation Analysis of Plant and Ear-kernel Traits

To study the relationship among the main agronomic traits of 12 maize single cross hybrids, the grey correlation analysis method was used to analyze the grey correlation degree of the main traits of plant, ear-kernel, yield and quality of the tested materials. The results showed that the plant and ear-kernel traits closely related to yield were kernel rate, kernel number per row, ear diameter, kernel weight per ear, 100-kernel weight and etc. The correlation degree was from 0.4353 to 0.3327. Plant and ear-kernel traits closely related to nutritional qualities such as crude protein, crude fat, crude starch and lysine content were kernel rate, plant height, ear length, cod diameter and kernel number per row, and etc. The correlation degree was 0.5106-0.3929. In summary, for the genetic improvement of different maize germplasm materials, it is necessary to give priority to the selection of kernel rate and 100-kernel weight on the premise of ensuring normal growth, and more attention should also be paid to the selection of plant height, ear length, cob diameter, kernel number per row, thus improving the breeding efficiency.