宝石鲈(♂)、淡水黑鲷(♀)及其杂交子一代的形态差异分析

Morphological variations of Scorturm barcoo(♂),Hephaestus fuliginosus(♀)and their hybrid F_1

利用聚类分析、主成分分析和判别分析方法对宝石鲈(Scorturm barcoo)、淡水黑鲷(Hephaestus fuliginosus)及其杂交子一代胜斑的形态学差异进行分析。结果表明,胜斑在体色上较偏向于母本淡水黑鲷;卡方分析结果显示,3种鱼在可数性状上差异不显着;聚类分析结果表明,宝石鲈、胜斑先聚为一类,再与淡水黑鲷聚为一类;主成分分析结果显示,胜斑与宝石鲈的重叠区域比胜斑与淡水黑鲷的重叠区域要大,主要差异体现在主成分1负荷值较大的12个参数上;运用判别分析建立3种鱼的函数,结果表明3种鱼的综合判别率为98.2%。3种多元分析结果均表明胜斑在形态上比较偏向于父本宝石鲈。

The morphological variations of Scorturm barcoo, Hephaestus fuliginosus and their hybird Fm Shengban were studied by using cluster analysis, principal component analysis and discriminant analysis. It was found that Shengban showed resemble to its female parent H. Fuliginosus in body color. The chi-square result displayed that the three kinds of fish had no significant difference in countable characters. Morphological characteristics of Shengban were more similar with H. fuliginosus than S. barcoo on the basis of cluster analysis. The principal component analysis showed that the overlap area between Shengban and S. barcoo was larger than the overlap area between Shengban and H. fuliginosus, which mainly differed embodied in the principal component 1 with 12 parameters with larger load value. Through the discriminant analysis, the comprehensive rate of the three kinds of fish was 98.2%. Three kinds of multivariate analysis results indicated that the hybird F1 prefered its male parent S. barcoo in appearance.