蝴蝶兰倍性与叶部和花部性状的相关性

A correlation between ploidy levels and characters of leaf and flower in Phalaenopsis

【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 Phalaenop-sis.[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 flow-ers 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 （P0.05 ） .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＆nbsp;and flower diameter , but negatively correlated with stomatal density and the number of flowers .