光皮树不同无性系主要农艺性状多样性分析

Diversity Analysis of Main Agronomic Characters of Different Cornus wilsoniana Clones

依据光皮树（Cornus wilsoniana）丰产育种目标,对7个光皮树优良无性系的28个农艺性状进行观测,并进行方差、主成分、聚类及相关性分析。方差分析结果显示28个农艺性状的变异系数为8.04%-94.30%,其中叶形态（叶形、叶色、叶缘）的变异系数最高;表型分化系数为45.27%-96.40%,即各性状的遗传较为稳定;主成分分析结果显示花序、果实、含油率以及果穗果数因子是主要的遗传因子,是光皮树无性系性状遗传的主要来源;依据主成分因子得分将7个光皮树优良无性系聚为4个类群,其中第Ⅱ类群与第Ⅲ类群杂交可以获得高产高含油率的目标资源。

In order to breed high-yield and high-oil species, associated with 28 agronomic traits, 7 Cornus wilsoniana clones were observed and analyzed by variance, principal component, cluster and correlation analysis methods. Vari- ance analysis showed that the variation coefficients of 28 agronomic characters ranged from 8.04% to 94. 30%, and the biggest variation was leaf pattern, such as leaf shape, leaf color and leaf margin character. Phenotypic differentiation coefficients ranged from 45. 27% to 96. 40%, and it showed that the inheritances of various characters were relatively stable. Main of inheritances were presented by four principal components, which are inflorescence, fruit, oil content and fruit quantity per cluster. According to the factor scores resulted from principal component analysis, these 7 clones were clustered into 4 groups. The high-yield and high-oil target species can be hybridized by group Ⅱ and group Ⅲ.