两种扇贝形态性状对体重和肉柱重的影响效果分析

The Relationship between Morphometric Characters and Weight Characters in Two Different Kind of Scallop

为了进一步明确栉孔扇贝(♀)×虾夷扇贝(♂)杂交子一代与栉孔扇贝形态性状对自身体重和肉柱重的影响,通过间接选择形态性状而实现质量性状的选择,从而使选育现场工作更加便捷高效,所以,随机选取杂交扇贝及对照组栉孔扇贝各60只,分别测量壳长、壳高、壳宽3个形态学指标并称量活体重和肉柱重。采用相关分析和通径分析的方法,计算这两种扇贝形态性状对体重、肉柱重的相关系数、通径系数和决定系数,进而对各性状的影响大小进行剖分。结果表明,两种扇贝各自形态性状与体重、肉柱重的相关系数均达到极显著正相关水平(P<0.01);3个性状对质量性状的直接贡献存有异同,杂交扇贝壳高是影响体重和肉柱重最重要的直接因素,而对于栉孔扇贝而言,壳高对体重的直接作用最大,壳长对肉柱重的直接作用最大。所以现场选育过程中杂交扇贝主要的选择依据是壳高,栉孔扇贝应以壳高和壳长为共同参照指标。

The purpose of this paper was to study the relationship between morphometric characters and weight characters of hybrid scallop and Chlarays farreri, which could gave more valuable information to people to achieve the effective work of scallop＇ s selectivebreeding. So 60 hybrid scallop from female C. farrerl and male Patinopecten yessoensis, and 60 C. farreri were collected randomly in the same sea area. And then the shell length, shell height, shell width, the live body weight and muscle weight were measured individually. The correlation coefficients, path coefficients and determination coefficients between morphological characters and weight were calculated by correlation analysis and path analysis. Impact factor of each character was analyzed lastly. The results showed that the correlation efficient between each morphological character and weight were all at extremely significant level （P〈0.01） in the two kind of scallops. Three morphological characters had different direct contributions to weight. As to the hybrid scallop, the shell height was the major direct factor to the weight of live body and muscle. While as to the C. farreri, the direct effect of shell height on body weight was the greatest one, and the greatest direct effect on muscle weight was the shell length. So the selective work for hybrid scallop mainly depended on shell height, while C farreti scallop depended on shell height and shellwidth.