马氏珠母贝生长性状的相关分析

对马氏珠母贝(Pinctadamartensi)不同生长时期的壳长、壳高、壳宽和活体质量进行了一年多的跟踪测量。分析表明,在不同生长时期,其4个性状的两两间的相关系数均达到极显著水平(P<0.01),但其相关系数大小排列顺序存在差异,8次测量的平均相关系数大小依次为壳高-壳长>壳宽-体质量>壳高-体质量>壳长-体质量>壳长-壳宽>壳高-壳宽。在不同生长时期,活体质量对壳高、壳宽的偏回归系数均极显著(P<0.01),而对壳长的偏回归系数在第1,3,7,15个月时不显著(P>0.05)。该研究的结果可为珍珠贝的选育种的重要目标性状的确定提供理论指导。

The growth trait correlated responses in pearl oyster Pinctada martensi

The shell height(X1),shell length(X2),shell width(X3) and live weight(Y) were measured at the ages of 1 month to 15 months of pearl oyster Pinctada martensi.The correlation coefficients among four growth traits were calculated.The results revealed that phenotype correlation coefficients among traits were significant(P<0.01),but different at each growth stage.The average correlation coefficients of eight growth stages are: X2-Y > X3-Y > X2-Y > X1-Y > X1-X3 > X2-X3.To eight multiple regression equations,the regression relationship for live weight to shell height and shell width was significant respectively(P<0.01),but to shell length was not significant at age 1,3,7,and 15 months(P>0.05).The results of this study are theoretically useful for selecting the important traits in selective breeding of P.martensi.