云纹石斑鱼(♀)×七带石斑鱼(♂)杂交F1形态特征与其亲本子代的比较分析

Comparative Analysis of the Morphological Characteristics Between Hybrid F1 by Epinephelus moara (♀) × E.septemfasciatus (♂) and the Offspring of Its Parents

中文关键词: 云纹石斑鱼  七带石斑鱼  杂交F1  形态特征

英文关键词: E. moara  E. septemfasciatus  Hybrid F1  Morphology

中文摘要:

      为研究云纹石斑鱼(♀)×七带石斑鱼(♂)杂交F1的形态特征以及与其亲本子代的关系，运用常规测量方法和聚类分析法对云纹石斑鱼、七带石斑鱼及云纹石斑鱼(♀)×七带石斑鱼(♂)杂交F1 3个群体6月龄幼鱼的形态特征进行测量和分析，对3个群体的12项可量、可数性状进行指数分析。结果显示，杂交F1体型呈椭圆形，侧扁而粗壮，体侧具7条灰褐色横向条带，杂交F1在体色条纹上均具有云纹石斑鱼与七带石斑鱼的特征；可量、可数的性状中有6项性状偏向于云纹石斑鱼，5项性状偏向于七带石斑鱼，1项与二者相同；聚类分析结果表明，杂交F1与云纹石斑鱼聚为一类。研究表明，杂交F1在体色条纹上表现为二者的中间态，在形态上较接近于母本云纹石斑鱼。

英文摘要:

      The current study described the morphological characteristics of the hybrid F1 by Epinephelus moara (♀) × E. septemfasciatus(♂) and the relationship to the offspring of its parents. The hybrid F1 of E. moara (♀) × E. septemfasciatus(♂) at 6 months old were measured and analyzed by the conventional morphometrics and the cluster analysis. Five traits of the countable characteristics and nine traits of the measurable characteristics of the hybrid F1 of E. moara (♀) × E.septemfasciatus(♂), E.moara, and E.septemfasciatus were analyzed. The result showed that the body shape of the hybrid F1 of E.moara (♀) × E.septemfasciatus(♂) were oval, flat and stout with seven taupe lateral bands on the side of body surface. The body color of the hybrid F1 by E.moara (♀) × E.septemfasciatus(♂) were a mixture of both E.moara and E.septemfasciatus. Among twelve measurable and countable traits for hybrid index analysis, there were six traits approached to E.moara, five traits approached to E. septemfasciatus and one trait approached to both the E.moara and E.septemfasciatus. The result of cluster analysis showed that the hybrid F1 of E.moara (♀) × E.septemfasciatus(♂) was closed to the female E.moara in the morphology. The study indicated that the body color of the hybrid F1 by E.moara (♀) × E.septemfasciatus(♂) appeared to be a mixture, and the morphological characteristics were closed to the female E. moara.