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用相关分析和主成分分析方法,对2013年贵州省毕节地区各育种单位新选的8个优良玉米组合的8个主要农艺性状进行了分析。结果表明,各农艺性状间存在着极其复杂的相关关系,株高与穗位高、果穗长与单穗粒重呈极显著正相关;穗行数与百粒重呈极显著负相关;果穗长与秃尖、单穗粒重与百粒重呈显著正相关。提取的4个主要成分,能够解释全部农艺性状的79.15%,以第一主成分的贡献率最大,为24.52%。
Eight major agronomic traits of eight elite maize combinations newly selected by breeding units in Bijie Prefecture of Guizhou Province in 2013 were analyzed by correlation analysis and principal component analysis. The results showed that there were extremely complicated correlations among the agronomic traits. The height of plant and ear were high, the ear length was very significantly and positively correlated with the weight of single ear, the number of ear was negatively correlated with the weight of one hundred, And bald sharp, single grain weight per 100 grain weight was significantly positively correlated. The four main components extracted can explain 79.15% of the total agronomic traits. The contribution rate of the first principal component is the largest, which is 24.52%.