不同性别中国蛤蜊数量性状的相关与通径分析  

Correlation and Path Analysis to Quantitative Traits of Mactra chinensis in Different Sexs

作　　者：肖露阳[1] 马贵范[1] 郭文学[1] 闫喜武[1] 杨凤[1] 张国范[2] 

机构地区：[1]大连海洋大学水产与生命学院/辽宁省贝类良种繁育工程技术研究中心,辽宁大连116023 [2]中国科学院海洋研究所,山东青岛266071

出　　处：《中国农学通报》2012年第29期115-119,共5页Chinese Agricultural Science Bulletin

基　　金：辽宁省高等学校优秀人才支持计划(2008RC10);现代农业产业技术体系(CARS-48)

摘　　要：为了查明中国蛤蜊各数量性状间的相关性及影响产量的因素组成。随机选取大连庄河野生群体中国蛤蜊二龄个体115个,测量其壳长(X1)、壳宽(X3)、壳高(X2)、活体重(X4)和软体重(Y),并显微鉴定其性别,采用相关与通径分析方法分析不同性别中国蛤蜊表型性状对软体重的作用效果,为中国蛤蜊人工繁育和品系选育提供理论依据和测度指标。结果表明:不同性别中国蛤蜊的形态学指标无显著差异(P>0.05);两者各数量性状之间的相关关系均达到极显著水平(P<0.01);决定系数分析表明:不同性别中国蛤蜊影响软体重的主要表型性状并不相同;雌性中国蛤蜊,壳高对软体重的直接作用最大是影响软体重的主要因素,壳高通过壳长的间接作用是影响软体重的次要因素;雄性蛤蜊的壳高对软体部重的直接作用大于活体重对软体重的直接作用,壳高通过活体重对软体重的间接作用是影响软体重的次要因素。剔除通径系数检验不显著的自变量,利用逐步回归的方法,建立了不同性别中国蛤蜊估计软体重的最优回归方程:Y雌=-12.857+0.184X1+0.141X2+0.205X4;Y雌=-9.089+0.387X2+0.085X4,回归方程分析表明回归关系均达到极显著水平(P<0.01)。In order to clarify correlation among quantitative traits and compositions influencing production clarify the correlation index and determinant coefficients between phenotypic traits and body-tissue weight of Mactra chinensis in different sexes,five metric traits including shell length（X1）,shell height（X2）,shell width（X3）,live body weight（X4） and body-tissue weight（Y） were measured and analyzed from 115 chosen individuals at two-years-old.The results showed that the difference on phenotypic characters of the Mactra chinensis in different sexes was not significant （P0.05）;The correlativity among the five measured traits in both females and males was significant （P0.01）;Determinant coefficients analysis showed that the mean characters that effect body-tissue weight were different;In females,shell height which had the largest direct effect was the key effective factor on body-tissue weight,and shell height had significant indirect effect on body-tissue weight through shell length;Shell height gave predominant effects on body-tissue weight in males,and gave indirectly predominant effect via live body weight body-tissue;The multiple regression equation of both females Y雌=-12.857＋0.184X1＋0.141X2＋0.205X4,（P0.01） and males Y雌=-9.089＋0.387X2＋0.085X4,（P0.01）） was established by using the stepwise regression method.This study provided a theoretical basis and measure indicatrix for the breeding of Mactra chinensis.

关 键 词：中国蛤蜊 性别 相关分析 通径分析 决定系数分析 

分 类 号：S968.3[农业科学—水产养殖]