【摘要】 为研究双线紫蛤形态性状与体质量之间的关系，随机选取6、12和18月龄双线紫蛤（Soletellina diphos）各50个个体，分别测量壳长（SL）、壳高（SH）、壳宽（SW）、体质量（BW）共4个数量性状，采用相关分析和通径分析的方法分别计算不同月龄群体对体质量的通径系数和决定系数。相关分析结果显示，6、18月龄群体均是壳长与体质量的相关系数最大（P<0.01）。根据多元回归分析结果，建立了3个月龄群体形态性状对体质量性状的多元回归方程：BW₆=-1.336+0.020SL+0.146SW+0.081SH,R²=0.976;BW₁₂=-29.701+0.584SL+0.695SW,R²=0.972;BW₁₈=-88.160+1.140SL+1.660SW,R²=0.911。通径分析结果表明，6月龄群体中影响体质量的主要因素为壳宽（0.466）,12和18月龄群体则为壳长（0.753,0.705），决定系数分析结果与通径分析结果相一致。本研究结果为双线紫蛤种质资源保护与利用提供了基础资料。更多还原

【Abstract】 To investigate the correlation between morphological traits and body mass in Soletellina diphos,50individuals from the 6-month-old,12-month-old,and 18-month-old populations were selected,and four quantitative traits,including shell length （SL）,shell height （SH）,shell width （SW）,and body weight （BW）,were measured.Correlation analysis and path analysis methods were employed to calculate path coefficients and determination coefficients for body weight across different age groups.Correlation analysis revealed that the highest correlation coefficient between SL and BW was observed in the 6-month-old and 18-month-old populations（P<0.01）.Multiple regression analysis yielded regression equations for each age group:BW₆=-1.336+0.020SL+0.146SW+0.081SH,R²=0.976;BW₁₂=-29.701+0.584SL+0.695SW,R²=0.972;BW₁₈=-88.160+1.140SL+1.660SW,R²=0.911.Path analysis identified SW as the primary determinant of BW in the 6-month-old population （0.466）,while SL played a predominant role in the 12-month-old and 18-month-old populations （0.753 and 0.705,respectively）.Determination coefficient analysis corroborated these findings.This study furnishes foundational data for the conservation and exploitation of S.diphos germplasm resources.更多还原