七种兜兰属植物的形态变异式样研究

Morphological Variation Pattern of Seven Species of Paphiopedilum Pfitzer

本研究选择杏黄兜兰及其7个近缘种,从形态性状水平分析了它们的形态变异式样.本研究中的7种兜兰属植物不同形态变异以及形态总体变异在物种水平表现出如此规律:在同一物种内,营养器官性状变异程度比生殖器官性大;同一性状在7个种间变异幅度基本接近,种间形态总体差异都不显著,不同种间,同一性状变异幅度基本相同.表明它们对环境适应能力不强,生存力较弱.这可能是它们珍稀额危的原因之一.7种兜兰植物的性状可能主要由遗传因子决定,尽管外界条件有很大影响,但只在一定程度上起修饰作用.花部性状的变异性往往小于营养性状的变异性.

Paphiopedilum armeniacum and 7 species of Paphiopedilum pfitzer from Yunnan province were studied by means of description analysis, Q-cluster analysis, average linkage cluster Analysis （R-cluster）, and PRINCOMP. The law of variation pattern of morphological has been obtained. It showed that reproductive organs varied more than nutrition organs with one species; no significant variation was seen for the same property with different species, indicating they are not strong enough to adapt to the environment and have a weak capability of natural growth, which decides their rarity in the world today.