广西禾花鲤形态性状与体质量的关系分析

Analysis of Relationship between Morphological Traits and Body Weight of Guangxi Rice Flower Carp

为探索广西禾花鲤(Rice flower carp)形态形状与体质量的关系,随机选择全州禾花鲤(QZ)和融水金边禾花鲤(RS)各133尾,分别测定体质量、体长、全长、体宽、体高、头长、吻长、眼间距、尾柄高、尾柄长共10个性状,采用相关分析、通径分析和多元回归分析方法,计算以体质量为依变量,以形态性状为自变量的通径系数、相关系数、相关指数和决定系数。结果表明,全州禾花鲤的全长、体宽和体高3个形态性状和融水金边禾花鲤4个形态性状(体长、全长、体高和头长)与体质量的通径系数、相关系数均达到极显著水平(P<0.01);并且2个群体所选形态性状与体质量的复相关系数R均大于0.85,说明所选形态性状是影响体质量主要性状。以体质量为依变量(Y),以全长(X1)、体长(X2)、体高(X3)、体宽(X4)和头长(X6)为自变量,采用逐步多元回归分析分别建立QZ与RS的回归方程:lgY=-0.990+1.735lgX1+0.432lgX4+0.790lgX3和lgY=-0.774+1.022lgX1+0.438lgX3+0.574lgX2+0.689lgX6。综上,在全州禾花鲤的选育过程中,全长、体高、体宽可作为重要的测量指标,而在融水金边禾花鲤的选育过程中,则以全长、体长、体高和头长为重要的测量指标。

In order to explore the relationship between the shape and weight of Guangxi rice flower carp,133 tails of Quanzhou rice flower carp(QZ)and Rongshui rice flower carp(RS)both were randomly selected.Ten morphometric traits were measured including body mass,standard length,total length,body width,body height,head length,snout length,eye spacing,caudal peduncle depth and caudal peduncle length.Correlation analysis,path analysis and multiple regression analysis were used,and with body mass as the dependent variable,morphological trait as the independent variable,path coefficient,correlation coefficient,correlation index and determination coefficient were calculated.The results showed that the path coefficient and correlation coefficient of the body mass with the four morphological traits(standard length,total length,body height and head length)of Rongshui rice flower carp and the three morphological traits(total length,body width and body height)of Quanzhou rice flower carp,and reached the extremely significant level(P<0.01).And the complex correlation coefficient R2 value of the selected morphological traits and body mass was greater than 0.85,which indicated that the selected morphological traits were the main traits affecting body mass.With the body mass(Y)as dependent variable,the total length(X1),body length(X2),body height(X3),body width(X4),and head length(X6)as independent variables,stepwise multiple regression analysis was used to establish regression equation:(QZ)lgY=-0.990+1.735lgX1+0.432lgX4+0.790lgX3;(RS)lgY=-0.774+1.022lgX1+0.438lgX3+0.574lgX2+0.689lgX6.In summary,in the breeding process of Quanzhou rice flower carp,the total length,body height and body width can be used as important measurement indicators,while in the breeding process of Rongshui rice flower carp,the total length,body length,boby height and head length are important indicators.