作　　者： ; ; ; ; ;

机构地区： 中国水产科学研究院珠江水产研究所

出　　处： 《上海海洋大学学报》 2012年第4期535-541,共7页

摘　　要： 为研究草鱼各形态性状对体质量的影响,测定287尾二龄草鱼全长、体长、头长、体宽、体高、眼间距、肛前距共7个形态性状和体质量,采用相关分析、通径分析和多元回归分析方法对草鱼7个形态性状与体质量进行相关性分析。剔除对体质量影响不显著的头长、体高及与体长存在显著共线性的全长,建立了以体质量为依变量(Y),体宽(X4),眼间距(X6),肛前距(X7),体长(X2)为自变量的回归方程:Y=-3048.127+220.925X4+262.367X6+33.776X7+10.648X2。所选形态性状与体质量的相关指数R2=0.900,说明所选性状是影响草鱼体质量的主要形态性状,其中体宽对体质量的直接影响(P=0.430)最大,是影响体质量的最主要因素。在选育过程中,可将4个主要形态性状作为一个整体考虑,作为草鱼选育的测量指标。研究亮点:国内首次报道了草鱼形态性状对体质量的影响,为草鱼选育提供理论依据。应用相关分析、通径分析、多元回归分析、共线性分析和显著性检验及方差检验,系统地探讨了草鱼7个形态性状与体质量的相关性,找出影响草鱼体质量的主要因素,并建立了回归方程。 To study the effects of morphological attributes on body weight of grass carp, 287 2-year-old individuals were sampled for measuring seven metric traits, including the total length, standard length, head length, body width, body height, interorbital width, length before anus, The relationship between morphological attributes and body weight was quantified by correlation analysis, path analysis and muhiple regression analysis to determine the major morphological attributes. The results showed that the correlation coefficients of each morphological trait to body weight were all very significant （P 〈 0.01 ）. Head length, body height were eliminated from the variable data, because of no significance in multiple regression analysis. Total length was also kicked out from variable data because it was co-linear with standard length. The regression equation was obtained as Y = - 3048. 127 ＋ 220. 925X4 ＋ 262. 367X6 ＋ 33.776X7 ＋ 10. 648X2, in which body weight（Y） was used as the dependent variables and body width （X4 ）, interorbital width （X6 ）, length before anus（X7 ）, standard length（X2 ） were as independent variables. Judged from the results of high correlation index（R2 = 0. 900） it suggests that the main variables have been selected, among them the body width weighted the most （ P = 0. 430 ） to the body weight, and it was key effective factor on body weight. In the selection process, four main morphological traits were considered as a whole, which provided essential theoretical basis and ideal measure for selective breeding of grass carp.

关 键 词： 草鱼 选育 相关分析 通径分析 多元回归分析

领　　域： [农业科学]