玉米引种材料的主成分分析和聚类分析

Principal Component Analysis and Cluster Analysis of Maize Introduced Varieties

对24个热带玉米引种材料的株高、穗位高、穗长、穗粗、穗行数、行粒数、百粒重、穗上位叶面积、穗位叶叶面积、穗下位叶面积、抽雄期、粗蛋白和粗脂肪等20个性状进行了测定,对得到的各性状值进行主成分分析。结果表明:形态和产量因子、生育期因子、穗行数因子、低产因子、脂肪含量因子、蛋白质含量因子和穗长因子这7个主要因子对变异的累积贡献率达83.149%。依据主成分向量将24个热带玉米引种材料聚为6类。

It was tested to plant height, ear height, ear length, ear diameter, row number per ear, kernel number per row, weight of 100 grain, leaf area above the ear, leaf area of the ear, leaf area under the ear, head sprouting, crude protein and oil which 20 traits of 24 tropical maize introduced varieties were involved were tested and component analysis was performed for them. The results indicated that the first seven principal components which accounts for over 83.149% of total variations were： morphology and yield factor, growth duration factor, row number per ear factor, low yield factor, oil content factor, protein content factor and ear length factor. Using them as complex index, the 24 tropical maize introduced varieties were grouped into 6 clusters.