摘要
为探明影响上海地区17月龄养殖长吻[鱼危](Leiocassis longirostris)体质量的主要形态性状,通过测定随机采集的302尾17月龄养殖长吻[鱼危]的体长(X_(1))、全长(X_(2))、体高(X_(3))、体宽(X_(4))和体质量(Y)等表型参数,运用相关分析、通径分析和多元回归分析方法研究了4个形态性状对体质量的影响,并构建了形态性状与体质量之间的最优多元线性回归方程。结果显示,17月龄长吻[鱼危]各形态性状与体质量之间的表型相关性均达到极显著水平(P<0.01),表明这些形态性状对体质量具有显著影响。通径分析结果显示,全长(X_(2))对体质量(Y)的直接通径最大,且其直接作用大于间接作用,是影响体质量的最关键性状。基于逐步回归分析结果,剔除偏回归系数不显著的形态性状,并排除存在共线性的自变量,最终构建了全长(X_(2))、体高(X_(3))和体宽(X_(4))性状对体质量(Y)的最优多元线性回归方程:Y=-503.939+17.709 X_(2)+47.439X_(3)+17.402X_(4)。该方程的拟合度检验结果达到了极显著水平(P<0.01)。研究表明,在对养殖长吻[鱼危]以体质量为目标性状进行人工选育时,可将全长性状作为主要的间接选择指标。
In order to identify the primary morphometric traits affecting the body weight of 17-month-old cultured Leiocassis longirostris in Shanghai,the phenotype parameters such as body length(X_(1)),total length(X_(2)),body height(X_(3)),body width(X_(4))and body weight(Y)of 302 randomly collected 17-month-old individuals were measured.Correlation analysis,path analysis and multiple regression analysis were applied to study the effects of 4 morphological traits on body weight and construct an optimal multiple regression equation between morphological traits and body weight.The results showed that all measured traits exhibited extremely significant correlations with body weight(P<0.01),indicating that these morphological traits had a significant effect on body weight.The result of path analysis indicated that the direct path coefficient of total length(X_(2))on body weight(Y)was the largest,and its direct effect was greater than the indirect effects,making it the most critical trait influencing body weight.Traits with insignificant partial regression coefficients were eliminated,and collinear independent variables were excluded,the optimal multiple linear regression equation was Y=-503.939+17.709 X_(2)+47.439 X_(3)+17.402 X_(4).The goodness-of-fit test for this equation also reached an extremely significant level(P<0.01).Therefore,the total length trait should be considered as the primary indirect selection indicator in the artificial selection of L.longirostris with body weight as the target character.
作者
于爱清
邓平平
施永海
徐嘉波
刘永士
杨明
YU Aiqing;Deng Pingping;SHI Yonghai;XU Jiabo;LIU Yongshi;YANG Ming(Shanghai Fisheries Research Institute,Shanghai Fisheries Technical Extension Station,Shanghai 200433,China)
出处
《水产科技情报》
2025年第2期69-75,共7页
Fisheries Science & Technology Information
基金
上海市科技创新行动计划项目(22N11900600)
上海领军人才项目(沪人社专2021-67号)
上海长江口主要经济水生动物人工繁育工程技术研究中心(13DZ2251800)。
关键词
长吻[鱼危]
形态性状
体质量
相关分析
通径分析
Leiocassis longirostris
morphological trait
body weight
correlation analysis
path analysis
