合浦珠母贝主要形态性状与体质量的灰色关联分析

Analysis of grey relationship between morphological traits and body weight of pearl oyster( Pinctada fucata)

文章采用灰色关联分析方法对合浦珠母贝（Pinctada fucata）12个家系的壳长、壳高、壳宽和绞合线长4个形态性状与体质量的关联度进行了分析和评价。结果显示,12个家系的平均体质量、壳长、壳高、壳宽和绞合线长分别为35.96 g、57.36 mm、59.24 mm、23.55 mm和56.93 mm。各个性状的变异系数较大（8.30%-21.30%）,其中壳高和壳宽的变异系数相对较小,而体质量的变异系数相对较大。体质量与各形态性状灰色关联系数之和以壳高为最大（8.950 8）,且家系间较均一,壳长为最小（8.189 8）,但家系间变化幅度较大。体质量与4个形态性状的关联度大小趋势为壳高（0.745 9）〉绞合线长（0.714 8）〉壳宽（0.705 9）〉壳长（0.682 5）。根据上述结果,可将壳高作为间接选育合浦珠母贝体质量性状的重要评价指标,以提高体质量的选育效率。

We conducted a grey relational analysis to examine the relationship between shell traits and body weight of 12 selective breeding families of Pinctada fucata. The results show that the average body weight, shell length, shell height, shell width and hinge length were 35.96 g, 57, 36 ram, 59.24 mm, 23.55 mm and 56. 93 mm, respectively. The coefficients of variation in body weight and shell traits were ranked as follows： body weight （21.30%） 〉 shell length （9. 91% ） 〉 hinge length （9. 12% ） 〉 shell height （8.85%） 〉 shell width （8.30%）. The grey relational degrees between each shell trait and body weight were ranked as follows： shell height （0. 745 9 ） 〉 hinge length （0. 714 8 ） 〉 shell width （0. 705 9 ） 〉 shell length （0. 682 5 ）. It is suggested that shell height which had the closest relationship with body weight could be regarded as an important factor for evaluation of P.fucata breeding practice for high growth lines selection and improvement of selection efficiency.