秦岭秀雅杜鹃7个野生群体形态性状的变异分析

对秦岭山区的7个秀雅杜鹃野生群体的表型变异情况进行分析。结果表明:秀雅杜鹃表型性状在种群间和种群内都存在一定程度的变异，但变异不大。各性状总的平均变异系数在0(雄蕊数目)~0.28(花梗长)之间,种群间总的平均变异系数在0.08(周至)~0.14(南郑)，花色性状种群间变异大,种群内变异较小。秀雅杜鹃表型性状与地理生态因子的相关分析表明，各个性状的变异和地理生态因子并无显著的相关性，说明表型受环境影响的程度相对较小。利用群体间欧氏距离进行的UPGMA聚类分析结果表明，秀雅杜鹃野生群体可以划分为3类。

Population Variation Analysis of Seven Rhododendron concinnum Wild Populations in Qinling Mountains

The morphological variations of 7 Rhododendron concinnum wild populations in Qinling Mountains were investigated. The results showed that there was certain but not significant morphological variation existing among natural populations and within the population in seven different regions of R.concinnum. The average coefficient of variation of each characteristic ranged from 0 (stamen number) to 0.28 (pedicel length), while among populations ranged from 0.08 (Zhouzhi)-0.14 (Nanzhen). Variation of flower color traits was high at species level and low at population level. The correlation analysis between the phenotypic traits of R.concinnum and geography ecological factor showed that the correlation was not significant. According to the UPGMA cluster analysis based on the Euclidean distance, 7 R.concinnum wild populations could be divided into three groups.