Journal of Tropical Oceanography >
Path and regression analysis of the phenotypic characters of Paphia undulate
Received date: 2008-09-22
Revised date: 2009-02-27
Online published: 2011-10-10
Supported by
农业部公益性行业(农业)科研专项经费(nyhyzx07-047); 广东海洋大学博士启动项目(E06031); 广东海洋大学重点学科
建设项目(ZD2006002)
Shell length, shell width, shell height, ligament length, and edible-part weight of each of the 200 Paphia undulata individuals were measured. The samples were randomly collected from Nansan, Zhanjiang province. A correlation coefficient matrix was constructed on basis of the measured data, in which the edible-part weight was set as dependent variable and other characters as independent variables. Path coefficient and correlation index were calculated, and the major phenotypic charac-ters were determined. It was found that all the correlation coefficients between independent variables and dependent variable were significant (P < 0.01). A predominant direct effect of the shell width on the edible-part weight was observed, followed by the effect of the shell height. The shell length had the smallest direct effect on the edible-part weight. Of all characters ana-lyzed, the ligament length was the least important factor than all other characters that directly affected the edible-part weight. The multiple regression equation between the edible-part weight and other characters was established as YEW＝-6.809 + 3.589XSW + 1.610XSH, where YEW is edible-part weight, and XSW and XSH are the shell width and shell height, respectively. The study provides theoretical information for breeding of the species.
Key words： Paphia undulata; Phenotypic characters; Path Analysis; Regression equation
WANG Qing-heng,DENG Yue-wen,DU Xiao-dong . Path and regression analysis of the phenotypic characters of Paphia undulate[J]. Journal of Tropical Oceanography, 2010 , 29(5) : 132 -135 . DOI: 10.11978/j.issn.1009-5470.2010.05.132
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