不同择伐方式云南松针叶表型多样性比较

Needles Phenotypic Diversity Analysis of Pinus yunnanensis in Different Selective Cutting Ways

摘要: 为探析云南松不同择伐方式下的表型变异程度和变异规律，对不同择伐方式下的云南松针叶表型性状进行比较。结果表明：云南松针叶性状在不同择伐方式群体间、群体内均具有极显著差异；云南松针叶性状变异系数波动于14.28%~22.04%，平均为17.83%。云南松群体间平均表型分化系数为11.38%，群体间变异小于群体内变异，即群体内变异是云南松表型变异的主要来源；群体间Shannon-Wiener′s多样性指数差异较小。因此，不同择伐方式对云南松针叶表型多样性的影响较小。

Abstract: In order to analyze phenotypic traits of needles of Pinus yunnanensis for determining the phenotypic traits variations, the phenotypic traits of needles of P.yunnanensis in different selective cutting ways was compared. The results showed that there were extremely significant differences among and within populations. The coefficient of variance (CV) of the traits was 14.28%-22.04%, with an average of 17.83%. The mean coefficient of phenotypic differentiation among populations was 11.38%, which was lower than that within populations, indicating that the variance within population was the main source of the phenotypic variation of the species. The Shannon-Wiener′s diversity index was smaller differences among populations. The phenotypic diversity of needles of P.yunnanensis was less affected by selective cutting ways.