棉花新品种产量性状与品质性状的典型相关与主成分分析

Canonical Relation and Principal Components Analysis of New Varieties of Cotton Yield and Quality Characteristics

产量性状与品质性状的典型相关分析结果表明,棉花新品种要在产量上有所突破,应重点选择结铃性强的材料,不仅可同步提高单铃子棉重、子指和衣分,还会间接增加纤维长度与强度,但应注意防止麦克隆值的增大,使纤维变粗。主成分分析结果,前4个主成分的方差累计贡献率达86.79%,根据各品种主成分的综合得分,对各参试品种进行综合评价,排名前3位的品种依次为同舟棉2号、百棉1号和锦科791。在每个品种相应于4个主成分得分的基础上进行聚类分析,从产量和品质的相似度上将13个品种聚为3大类。图1,表7,参8。

Canonical relation analysis of yield and quality characteristics showed that a breakthrough could be made in the yield of new varieties of cotton when material with the strong abilities to bear more bells is selected, not only the seed cotton weight, seed index and lint percentage are increased respectively, but also the fiber length and strength are improved indirecdy. In the meantime, attention should be paid to prevent the micronaire value from becoming high resulting in the fiber becoming thick. The principal components analysis showed that, while according to the synthetic points of the principal components of every variety, synthetic comment was carried out on every tested variety. The listed former three were Tongzhoumian 2, Baimian 1 and Jinke 791 respectively. Cluster analysis of these varieties was carried out on the basis of the four principal components points. Thirteen varieties were clustered into three groups.