Abstract:

The result of correlation analysis between body size traits and quality traits of Clinocardium californiense showed that all the 11 quantitative traits（shell lengh, shell high, shell width, umbo to front\|end, umbo to back\|end, front\|end to shell margin, back\|end to shell margin, body weight, shell weight, flesh weight and flesh dry weight）were significantly correlated with each other(P<0.01). The result of path analysis showed that shell width directly affected the major body size traits including body weight, shell weight and flesh weight, and its direct effects were 0383, 0.540, 0.419. Looking from the indirect effects, shell high had the maximum indirect effect on body weight as 0.580. Umbo to back\|end had the maximum indirect effect on shell weight as 0.583. Umbo to front\|end had the maximum indirect effect on flesh weight as 0.639. The optimal regression equations established by stepwise regression method using body size traits to estimate quality traits were: BW=-28.816+0.741Sw+0.213SH+0.245SL+0.321b,SW=-13.453+0.152SH+0.486Sw+0.148, FW=-7.629+0.085SH+0.237Sw+0.068a+0.083d, respectively. These results has provided theoretical references both for Clinocardium californiense culture practice and studies on its germplasm.

Key words: Clinocardium californiense, body size trait, quality trait, path analysis

摘要：

对加州扁鸟蛤的体尺性状与质量性状之间的相关分析结果表明，所测量的加州扁鸟蛤的11个数量性状（壳长、壳高、壳宽、壳顶至壳前、壳顶到壳后、壳前到壳缘、壳后至壳缘、体质量、壳质量、软体部质量及软体部干重）间的相关性均为极显著水平（P<0.01）。通径分析结果显示，直接影响体质量、壳质量及软体部质量的主要体尺性状是壳宽,其直接作用分别为0.383、0.540、0.419;从间接作用看，壳高对体质量的间接作用最大，为0.580；b对壳质量的间接作用最大，为0.583；a对软体部质量的间接作用最大，为0.639。采用逐步回归方法建立了利用体尺性状估计质量性状的最优回归方程分别为：BW=-28.816+0.714Sw+0.213SH+0.245SL+0.321b，SW=-13.453+0.152SH+0.486Sw+0.148b，MW=-7.629+0.085SH+0.237Sw+0.068a+0.083d。该研究结果为加州扁鸟蛤的人工养殖和种质资源研究提供理论参考。

关键词: 加州扁鸟蛤；体尺性状；质量性状；通径分析