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通过对54个花椰菜自交系材料进行主成分分析和聚类分析研究,以期为花椰菜育种中亲本选配提供帮助。结果表明:在主成分分析中,选取方差累积贡献率为70.024%的前6个主成分来评价花椰菜自交系资源;现球期、采收期、叶长、叶宽、株高、花球纵径、花球横径、球重、球形、球紧实度、叶色、蜡粉、内叶数、始花期和株幅是花椰菜亲本选择的主要形态指标。进一步通过系统聚类,将54个花椰菜自交系分为3类:第Ⅰ类表现为早熟、株幅小、叶片狭窄、蜡粉较少、球重和紧实度中等;第Ⅱ类表现为中熟、株幅中等、叶片灰绿、蜡粉较厚和花球半圆紧实且重;第Ⅲ类表现为晚熟、株幅大、株形高、叶片宽阔、蜡粉中等和花球扁圆。3个类群自交系性状之间的差异较为明显,有利于杂交育种亲本材料的选择。
Through the principal component analysis and cluster analysis of 54 cauliflower inbred lines, we hope to help the parental selection in cauliflower breeding. The results showed that in the principal component analysis, the first 6 principal components with a cumulative contribution rate of 70.024% were selected to evaluate the resources of cauliflower inbred lines. The current date, harvest time, leaf length, leaf width, plant height, The main morphological indexes of cauliflower parents selection were vertical length, diameter of flower ball, weight of ball, sphere, compactness of ball, leaf color, wax powder, inner leaf number, initial flowering period and plant width. The 54 cauliflower inbred lines were further divided into three groups by cluster analysis: the first group showed early maturity, small plant width, narrow leaves, less wax powder, medium weight and firmness; the second class showed Medium maturity, medium leaf width, grayish green leaves, thicker wax flower and semicircle of flower balls were firm and heavy. The third category showed late maturity, large plant width, tall plant shape, wide leaves, . The differences among the traits of three inbred lines were more obvious, which was in favor of the selection of parental materials for crossbreeding.