中国水产科学2017，Vol.24Issue(1)：31-39,9.DOI:10.3724/SP.J.1118.2017.16100
团头鲂与三角鲂或长春鳊杂交后代的生长及形态对比分析
Comparative analysis of growth and morphological variations among Megalobrama amblycephala, M.terminalis, Parabramis pekinensis and their hybrids
摘要
Abstract
In the present study,growth rates ofMegalobrama amblycephala (AA),M.terminalis (TT),Parabramis pekinensis (PP),and their hybrids (AT,TA,AP,and PA) were compared to investigate growth and morphological differences.Three multivariate morphometric analyses were conducted to assess morphological variations based on meristic parameters,measurable scaling parameters,and truss network scaling parameters.In the first group,absolute weight gain rates of AT and TA were significantly greater than that of TT but were all lower than that of AA (0.36 g/d) (P＜0.05).Growth rate of AA was 2.4,1.2,and 1.3 times that of TT (0.15 g/d),AT (0.30 g/d),and TA (0.27 g/d),respectively.In the second group,the absolute weight gain rate of AA was also the largest (0.24g/d),which was 1.7,1.4,and 1.6 times greater than that of PP (0.14 g/d),AP (0.17 g/d),and PA (0.15 g/d),respectively.The growth rate of AA was significantly faster than that of TT and PP (P＜0.05),and the growth rate of their hybrid offspring was between that of their parents;lower than that of AA,but higher than that of TT or PP.In addition,no differences in countable characters were detected among the seven groups (P＞0.05).Based on the nine measurable scaling parameters and 20 truss network scaling parameters,a cluster analysis revealed that the hybrids were closer to their female parent than to their male parent;namely,the relationships with TA and TT were closer than the relationships with AA,AT,AP,and PA.A discriminant analysis using the morphological characteristics of the seven breeding groups was carried out,resulting in a high comprehensive discriminant rate of 86.30％.A principal component analysis (PCA) showed that three main PCs were obtained with a cumulative contribution rate of 95.81％ of total variation,which represented the major morphological variation in the seven breeding groups.Furthermore,traits with a larger feature vector absolute value for PCl were mostly concentrated in the head and dorsal-ventral axis,whereas traits influenced by PC2 were mostly concentrated in the tail.Overall,these results provide a theoretical basis for fish breeding and identifying Parabramis and Megalobrama germplasm.关键词
鳊/鲂/杂交子代/形态学/多元统计Key words
Parabramis/Megalobrama/hybrid offspring/morphology/multivariate morphometrics analysis分类
农业科技引用本文复制引用
关文志,郑国栋,吴成宾,王成龙,杜尚可,陈杰,蒋霞云,邹曙明..团头鲂与三角鲂或长春鳊杂交后代的生长及形态对比分析[J].中国水产科学,2017,24(1):31-39,9.基金项目
国家科技支撑计划项目(2012BAD26B00) （2012BAD26B00）
国家自然科学基金项目(31272633,31201760) （31272633,31201760）
上海高校知识服务平台(ZF1206). （ZF1206）
