【目的】研究蝴蝶兰 Phalaenopsis 倍性与主要性状的相关性.【方法】采用压片法对85份蝴蝶兰资源的倍性进行了鉴定，测量了这些资源的气孔长度、气孔密度、叶长、叶宽、叶厚、花朵直径和花朵数.【结果和结论】85份蝴蝶兰资源中3份为二倍体，占3.5％；9份为三倍体，占10.6％；73份为四倍体，占85.9％.四倍体蝴蝶兰的气孔长度和花朵直径显著大于二倍体和三倍体，而气孔密度和花朵数显著少于二倍体和三倍体(P<0.05).三倍体蝴蝶兰的气孔长度、花朵直径和花朵数与二倍体蝴蝶兰差异均不显著(P>0.05)，但气孔密度显著小于二倍体(P<0.05).四倍体蝴蝶兰的叶长显著大于二倍体(P<0.05)，但二倍体与三倍体、三倍体与四倍体在叶长上差异不显著(P>0.05).二倍体、三倍体和四倍体在叶宽和叶厚上差异均不显著(P>0.05).蝴蝶兰倍性与气孔长度、叶长和花朵直径呈极显著的正相关关系，与气孔密度和花朵数呈极显著的负相关关系.
【Objective】To research the correlation between ploidy levels and main characters in Phalaenopsis. 【Method】Ploidy levels of 85 Phalaenopsis accessions were identified by using squash method, and the length and density of stoma, the length, width and thickness of leaf, the diameter and the number of flowers were also measured. 【Result and conclusion】The results showed that in the 85 accessions there were three diploids (3.5%), nine triploids (10.6%) and 73 tetraploids (85.9%). Stomatal lengths and the length of tetraploid flower were obviously longer than those of diploid and triploid flower, while the density of stoma and the number of flowers were fewer than that of diploid and triploid(P<0.05). The differences of the stomatal cell length and diameter and the number of flower between diploid and triploid were not significant at 5% level, however, the stomatal density of triploid was less than that of diploid(P<0.05). The leaf length of tetraploid was significantly longer than that of diploid(P<0.05), while the difference of leaf length between diploid and triploid or between triploid and tetraploid was not significant(P>0.05). The difference of leaf width and thickness among diploid, triploid and teraploid were also not significant either(P>0.05).The ploidy levels were, to a large extant, positively associated to stomata length, leaf length and flower diameter, but negatively correlated with stomatal density and the number of flowers.