不同生长环境下花[鱼骨]的形态特征比较

Comparison of Morphological Characteristics of Hemibarbus maculates under Different Growth Environments

运用3种多元统计分析方法对采自太湖、钱塘江桐庐段的野生花[鱼骨]以及由太湖野生群体经人工繁育3代的花鳐骨这三个群体的30个形态参数进行了比较。结果显示,太湖群体和东林养殖群体的形态较为接近,而与桐庐群体的差异较大。利用主成分分析构建了3个主成分,其贡献率分别为主成分1 55.08%、主成分2 14.01%、主成分3 6.87%,它们的累积贡献率为75.97%。逐步判别选入3个贡献率较大的性状进行判别分析,通过建立的3个群体判别函数,其判别准确率P1为75%~100%,P2为77%~100%,综合判别率为86%,结果表明3个群体形态差异显著(P<0.01)。该研究为花[鱼骨]不同群体的鉴别积累了基础资料以及为花[鱼骨]的增殖放流、优良品种的培育和种质资源保护提供理论依据。

Three multivariate analysis methods were used to compare 30 morphological characteristics parameters of three populations of Hemibarbus maculatus,including two wild populations collected from Taihu Lake and Qiantangjiang River(Tonglu section),Donglin breeding population after 3 generations of artificial breeding.The results showed that the morphological characteristics of Taihu population and Donglin breeding population were similar,which had greater difference with those of Tonglu population.Through principal component analysis,three principal components were established,their contribution rates were 55.08%,14.01%,6.87%,respectively,and the cumulative contribution rate was 75.97%.Three traits with higher contribution rate were selected for discriminant analysis by stepwise discrimination.The discrimination functions of the three populations were set up.The discrimination accuracy P 1 was 75%-100%,P 2 was 77%-100%,comprehensive discrimination rate was 86%.The stepwise discrimination analysis revealed that the morphological characteristics were significantly different among three populations(P<0.01).This study accumulated basic data for the identification of different populations of H.maculatus,and provided theoretical basis for the proliferation and release of H.maculatus,the cultivation of godd breed and the protection of germplasm resources.