主成分分析对青贮玉米材料综合评价与筛选的研究

以26份不同青贮玉米自交系为材料，采用SPSS软件的主成分分析法，以青贮玉米高消化养分为核心，从农艺、品质和耐旱生理3个方面进行综合评估。结果表明：青贮材料J36、QUAN、Q318、1081等4份材料品质优，农艺性状好，光合能力强，综合表现好，适合在丘陵旱区作青贮玉米资源。材料共同特征为秸秆干物质产量和体外消化率高，穗位叶片最大光能转化率大，叶绿素含量较高。运用SPSS软件的主成分分析法评价结果与各份材料在生产种植及育种工作中情况基本吻合。

Screening and Evaluation for the Silage Maize Inbred Lines by Using PCA

By using PCA based on SPSS was carried out with 26 silage maize inbred lines which were different in silage characters, the main results were summarized that four elite inbred lines with good quality and agronomic traits and high drought tolerance had been screened out which were J36, QUAN, Q318 and 1081, they were propitious to silage maize breeding which had higher yield of stover, IVDMD, ear leaf Fv/Fm and SPAD. The results also showed that the evaluation was very similar with the planting and breeding fact of the silage maize lines by using PCA based on SPSS in Sichuan province, so using the method to evaluate the silage maize lines can get a better effect.