关键词: 加州扁鸟蛤；体尺性状；质量性状；通径分析

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