36月龄雌、雄大黄鱼生长性状的相关分析与通径系数

摘要

In this paper, the relationship among total length, body length, body height and body weight were analyzed and the effects of total length, body length, and body height on body weight were studied by path coefficient in 2 groups of 36 month old large yellow croaker Larimichthys crocea in Min-Yue dong tribe, one from wild broodstock and cultured in cage in sea-water (XY-YS group) and the other from breeding F1 and cultured in cage in sea-water(XY-JC-F1 group). The results showed that the pair correlation among to-tal length, body length, body height and body weight was found very significant (P<0.01), the maximum correlation coefficient be-tween body length and total length (0.834~0.986). There was larger variation coefficient in XY-YS group than that in XY-JC-F1 group. The body height (direct path coefficient 0.363) in XY-JC-F1 group and body length (direct path coefficient 0.846) and body height (direct path coefficient 0.732) in XY-YS group were the most important characters influencing the body weight of the female brookstock. In the male brookstock, however, the most important character was the total length in XY-JC-F1 group(direct path coeffi-cient of 0.325) and XY-YS group(direct path coefficient of 0.340).%研究海捕和选育子一代经网箱培育的36月龄雌、雄闽-粤东族大黄鱼亲鱼（分别为XY-YS组和XY-JC-F1组）的全长、体长、体高和体质量等生长性状的相关性，并采用通径系数法分析全长、体长、体高对体质量的影响。结果表明：全长、体长、体高和体质量两两之间的相关性极显著（P<0.01），体长与全长的相关系数（0.834～0.986）最大；XY-YS组变异系数大于XY-JC-F1组；XY-JC-F1组中大黄鱼雌鱼体高（直接通径系数0.363），XY-YS组中体长（直接通径系数0.846）、体高（直接通径系数0.732）是影响体质量最重要的性状；全长是影响XY-JC-F1和XY-YS组中大黄鱼雄鱼体质量最重要的性状，直接通径系数分别为0.325和0.340。