湖南省玉米地方品种表型性状综合评价及类群划分

郭欢乐, 汤彬, 李涵, 曹钟洋, 曾强, 刘良武, 陈志辉

Comprehensive Evaluation of Phenotypic Traits and Classification of Maize Landraces in Hunan Province

Guo Huanle, Tang Bin, Li Han, Cao Zhongyang, Zeng Qiang, Liu Liangwu, Chen Zhihui

表4 湖南省玉米地方品种表型性状主成分分析

Table 4 Principal component analysis of phenotypic traits of maize landraces in Hunan province

性状 Trait 第1主成分 PC1 第2主成分 PC2 第3主成分 PC3 第4主成分 PC4 第5主成分 PC5 第6主成分 PC6 单株产量Yield per plant 0.3597 0.3400 -0.0137 0.0005 -0.0801 0.1904 生育期Growth period 0.1320 -0.2914 0.2288 -0.4853 0.0749 0.0619 株高Plant height 0.4368 -0.169 0.0290 -0.0161 0.1238 -0.1375 穗位高Ear height 0.3656 -0.3386 -0.0303 0.1467 0.0688 0.1850 穗位比Ratio of ear height 0.1392 -0.3721 -0.0934 0.2747 -0.0100 0.4624 倒伏（折）率Lodging rate 0.1168 -0.2452 -0.2661 0.3365 0.0774 -0.1196 叶片数Leaf number 0.3191 -0.2558 0.1587 -0.1469 0.0031 0.1409 穗长Ear length 0.3905 0.1350 -0.1522 0.0371 -0.0852 -0.4666 秃尖长Bald tip length -0.0169 0.0420 0.3813 0.5618 0.5349 -0.2421 穗粗Ear diameter 0.2663 0.3003 0.3950 0.0191 0.0383 0.0281 穗行数Row number per ear 0.0229 -0.0154 0.5850 0.2672 -0.6509 0.0509 行粒数Grain number per row 0.3735 0.2150 -0.2927 0.0227 -0.2531 -0.1812 出籽率Rate of seed 0.0068 0.3313 -0.2608 0.2998 -0.0534 0.4993 千粒重1000-grain weight 0.1738 0.3547 0.1432 -0.2309 0.4201 0.3115 特征值Eigenvalue 3.6407 3.3966 1.3140 1.1702 0.9752 0.9467 贡献率Contribution rate (%) 26.0047 24.2611 9.3856 8.3589 6.9654 6.7622 累计贡献率Cumulative contribution rate (%) 26.0047 50.2659 59.6515 68.0103 74.9757 81.7379