超甜玉米自交系主要农艺性状及鲜穗产量的主成分分析

Principal Component Analysis on Main Agronomic Characters and Fresh Ear Yield of Super Sweet Corn Inbred Line

为了研究影响超甜玉米鲜穗产量和主要农艺性状间的主次关系,应用多元统计方法,以30个超甜玉米自交系为试验材料,对株高、穗位高、叶片数、茎粗、秃尖长、穗长、穗粗、穗行数、行粒数、百粒重、出籽率、鲜穗产量等12个性状进行主成分分析。分析结果表明,前7个主成分的累计贡献率大于85%,说明前7个主成分就可以基本表达原12个性状所代表的遗传特征。前7个主成分主要包括产量因子、穗行数因子、穗粗因子、粒重因子、株高因子、茎粗因子和秃尖长因子,这些因子大致代表了供试自交系的综合指标,为超甜玉米自交系的性状综合选择提供了依据。

In order to investigate relations of primary and secondary on main agronomic characters which influencing fresh ear yield of super sweet corn inbred line. The data were analyzed by multiple statistic methods. It was tested to plant height, ear height, leaf number, stem diameter, bare top length, ear length, ear diameter, ear rows, kernel per row, 100-kernel weight, percentage of kernel and fresh ear yield which 12 traits of 30 super sweet corn inbred lines involved were tested and principal component analysis was performed for them. Principal component analysis showed that the first 7 principal components characteristic values reach over 85% in their accumulative contribution rates, these principal components values will represent the genetic characteristics of 12 characters. The first 7 principal components might be regarded as fresh ear yield factor, ear rows factor, ear diameter factor, kernel weight factor, plant height actor, stem diameter factor and bare top length factor. That represented the comprehensive indexes of the experimental inbred lines. The above results could underlie comprehensive multiple character selection for super sweet corn inbred lines.