云南木香花天然居群的表型多样性研究

A study on phenotypic diversities in the natural population of Rosa banksiae Ait. in Yunnan

在云南天然分布区选择5个有代表性的木香花居群为研究对象,应用居群生物学的原理和方法对木香花的15个表型性状进行多样性分析.结果表明:木香花表型性状在居群间和局群内存在广泛的变异,15个性状的F值范围为1.92～370.6,绝大多数性状在居群间和居群内均达到显著或极显著水平;平均表型分化系数为61.10%,居群间变异(35.92%)大于居群内变异(20.44%),说明居群间的变异是木香花的主要变异来源;对其地理因子与15个表型性状相关性分析表明经度对性状的影响较大;利用群体间欧氏距离进行的UPG-MA聚类分析结果显示,5个天然群体可以划分为2类.

15 phenotypic characters of Rosa banksiae from five natural populations in Yunnan were analyzed applying the population biological theories and methods.The results showed that variation was widely distributed among and intra-populations,F value of the 15 characters were from 1.92 to 370.6,and most traits were quite significantly or significantly diversified both among and within populations;The mean phenotypic differentiation coefficient of the 15 characters was 61.10%,and the variation among populations was higher,which indicated that the variation among populations was the main source of the phenotypic variation;The Correlation analysis showed that most characters were affected by different latitudes;Five natural populations was arranged into 2 groups by UPGMA cluster analysis.