栉江珧形态性状对重量性状的影响

Effects of morphometric traits on weight traits of Atrina pectinta

随机选取101只野生栉江珧,测量其壳长(SL)、壳宽(SW)、壳高(SH)、壳顶角(AG)4个形态性状和体重(WG)、软体重(WT)、闭壳肌重(WM)3个重量性状,采用相关分析和通径分析方法得出了不同形态性状对重量性状的影响效果。结果表明,除壳顶角与闭壳肌重的相关系数不显著外,其余形态性状与重量性状间的相关系数均达极显著水平(P<0.01);壳高对重量性状的直接作用和间接作用均较大,是影响重量性状的主要因素;壳长和壳宽通过壳长对重量性状的间接作用较大,直接作用较小,是影响重量性状的两个次要因素;利用逐步回归分析建立了栉江珧形态性状关于体重(Y=69.112SH+52.823SW-751.367)、软体重(Y=37.161SH+43.404SW+4.111SA-614.096)和闭壳肌重(Y=4.275SH-18.610)的最优回归方程。

Seven morphometric shell length （SL）, shell width （SW） traits and weight traits of wild Atrina pectinta, including shell height （SH）, live body weight （WG）, tissue weight （WT）, adductor muscle weight （WM） and shell dip angle（AG）, were measured. The relationships between these morphological traits （SL, SW, SH, and SA） and weight traits （WG, WT, and WM） were evaluated by correlation analysis and path analysis. Traits such as SL, SW, SH and SA were used as independent variables, while WG, WT and WM were used as a dependent variables. It was found that correlation coefficients between morphometric traits （SL, SW, and SH） and weight traits （WG, WT, and WM） were significantly different （P〈0.01）. Shell height, as a key effective factor, had predominant direct impact and indirect impact on weight traits. Shell length and width, as two secondary factors, showed significant indirect impact through shell height and slight direct impact on weight traits. The morphometric traits having significant impact on weight traits were used to establish the multiple regression equations of WG, WT and WM. Y=69. 112SH＋52. 823SW--751.36,Y=38. 485SW--472. 912,Y=4. 275SH --18. 610. The results provide a theoretical tool for genetic breeding study of A. pectinta.