【摘要】 对长江铜陵段捕获的0⁺龄铜鱼（Coreius heterodon（Bleeker））的体长（X₁）、头长（X₂）、吻长（X₃）、体宽（X₄）、眼间距（X₅）、尾柄长（X₆）、尾柄高（X₇）、背鳍基底长（X₈）、臀鳍基底长（X₉）、体高(X₁₀)等10个外部表型性状进行相关分析、回归分析及通径分析,以研究长江铜鱼各外部表型性状与体质量（Y）的关系,为铜鱼的人工育种提供选择策略。结果显示, 10个表型性状与体质量之间的相关系数均达极显著水平,其中,尾柄高、体长的相关系数最大（0.917,0.917）;在通径分析中,眼间距对0⁺龄铜鱼体质量的直接作用最大（0.390）,体长直接作用最小（0.294）;而决定系数随着多个性状的引入不断增大;尾柄高、眼间距、体长这3个性状对体质量的影响最显著,这3项指标对体质量的最优回归方程为Y=-75.808+22.072X₇+33.333X₅+2.559X₁（R²=0.945）,方程的方差分析结果显著,说明所建立的回归方程具有实际应用价值。更多还原

【Abstract】 Total 10 phenotypic traits of 0⁺ Coreius heterodoncaptured in the Tongling Section of Yangtze River are measured(include the body length（X₁）,head length（X₂）,snout length（X₃）,body width（X₄）,interorbital width（X₅）,length of caudal peduncle（X₆）,depth of caudal peduncle（X₇）,length of dorsal fin base（X₈）,length of anal fin base（X₉）,and body height(X₁₀)).The correlation analysis,multiple regression analysis and path analysis are performed to determine the correlation between various phenotypic traits and body weight of Coreius heterodon and provide a selection strategy for artificial breeding of copper fish.The results show that the correlation coefficient between the 10 phenotypic traits and body weight（Y）is extremely significant,and the correlation coefficient of X₁ and X₇ is the largest（0.910,0.910）;the result of the path coefficient analysis shows that the direct effect of X₅ on Yof copper fish is the largest（0.390）,and X₁ has the least direct impact（0.294）;the determination coefficient increases continuously with the introduction of multiple traits;while X₇,X₅ and X₁ have the most significant effects on Y.The optimal linear regression equation for 0⁺ copper fish is Y=-75.808+22.072 X₇+33.333 X₅+2.559 X₁,R²=0.945;the variance analysis of the equation is significant,indicating that the established regression equation has practical application value.It provides certain guidance for the future genetic breeding of copper fish（Coreius heterodon（Bleeker））.更多还原