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不同时期牙鲆形态性状对体重影响的通径分析及曲线拟合研究 [中文引用][英文引用]

Path analysis and curve estimates of morphometric traits and body weight of Paralichthys olivaceus at different growth stages

作者:陈红林1 2  田永胜1  刘峰1 2  李洪1 2  李祥孔1 3  宋莉妮1 2  陈松林1 
作者(英文):CHEN Honglin1 2  TIAN Yongsheng1  LIU Feng1 2  LI Hong1 2  LI Xiangkong1 3  SONG Lini1 2  CHEN Songlin1 
分类号:S917
出版年·卷·期(页码):2016·23·第1期(64-76)
DOI: 10.3724/SP.J.1118.2016.15072
-----摘要:-------------------------------------------------------------------------------------------

以8月龄与14月龄的养殖牙鲆(Paralichthys olivaceus)为研究对象,分别测定体重(Y)和22个形态性状,对各性状进行相关分析,并建立多元回归方程,对各形态性状对体重的影响效果进行通径分析。分别以进入回归方程的各形态性状作为自变量,体重为因变量进行曲线模型拟合,筛选最优拟合模型。结果显示:(1)在不同生长阶段,相同形态性状与体重的相关性存在差异。(2)8月龄阶段, X18(腹鳍基部到背鳍终点的直线距离)、X4(体宽)和X11(背鳍起点到臀鳍起点的直线距离)对体重的通径系数达到极显著水平(P < 0.01), 14月龄阶段, X18X14(背鳍终点到臀鳍终点的直线距离)和X9(尾柄长)对体重的通径系数达到显著水平(P < 0.05),由此可知,不同生长阶段,影响体重的形态性状不尽相同。8月龄和14月龄牙鲆形态性状对体重的多元回归方程分别为:Y=-119.541+7.191X18+10.135X4+7.197X11; Y=-484.931+31.959X18+81.928X14-17.899X9。(3)8月龄阶段,将回归模型中的3个自变量分别与体重进行模型拟合,最优拟合模型均为线性模型,分别为:Y=-117.866+15.724X18; Y=-94.579+24.763X4; Y=-100.602+33.184X11; 14月龄阶段,将回归模型中的3个形态性状分别与体重进行模型拟合,最优拟合模型均为幂函数模型,分别为:Y=0.036X183.063; Y=0.095X142.587; Y=62.249X91.584。本次研究表明,在牙鲆的不同生长时期,影响体重的主要形态性状不同,两阶段适用的最优拟合模型也不同,这为牙鲆不同时期的选择育种工作提供了理论依据。

-----英文摘要:---------------------------------------------------------------------------------------

Paralichthys olivaceus is one of the most important aquaculture species in China. However, intensive breeding and many generations of inbreeding have resulted in poor disease resistance and slow growth. Therefore, it is necessary to improve the quality and productivity of P. olivaceus through selective breeding. To study the relationship between morphometric traits and body weight of P. olivaceus at different growth stages, 83 fish were selected randomly (8 months old, n=52 and 14 months old, n=31) to measure 22 morphometric traits and body weights. The data were statistically processed using correlation, path, and stepwise regression analyses, and multivariate regression equations were calculated. The traits were included in the equation as independent variables, and body weight was the dependent variable in six curve-fitting models to select the optimal model. The results showed that: (1)the correlation coefficients between body weight and each trait varied and differed at the two developmental stages. (2)The path coefficients of X18, X4, and X11 for 8-month body weight were highly significant (P < 0.01). The path coefficients of X18, X14, and X9 for 14-month body weight were also significant (P < 0.05). The multivariate regression equation was Y=-119.541 + 7.191 X18 + 10.135 X4 + 7.197 X11 for 8 months, and Y=-484.931 + 31.959 X18 + 81.928 X14 - 17.889 X9 for 14 months. This result suggests that the vital morphometric traits that affected body weight at the two growth stages were different. (3) All optimal models at 8 months were linear, including Y=-117.866 + 15.724 X18, Y=-94.579 + 24.763 X4, and Y=-100.602 + 33.184 X11. However, all optimal models at 14 months were power models, including Y=0.036 X183.063, Y=0.095 X142.507, and Y=62.249 X91.584. These results indicate that the growth rhythms between the two growth stages were different. The R2 values for the multivariate regression equations at 8 and 14 months were 0.965 and 0.984, respectively, indicating that the equations can be used to predict P. olivaceus body weight. The R2 values for the X11 linear model at 8 months and the X9 and X14 power models at 14 months were all < 0.85, indicating that X11, X9, and X14 did not explain body weight as a single independent variable. The X18 path coefficient appeared in the multivariate regression equations at both growth stages, indicating that X18 is a predominant morphometric trait affecting body weight and can be regarded as an assisted selection trait for body weight. These results provide a theoretical basis for selective breeding of P. olivaceus at different developmental stages.

-----参考文献:---------------------------------------------------------------------------------------

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若需在您的论文中引用此文,请按以下格式著录参考文献:
中文著录格式: 陈红林1,2,,田永胜1,,刘峰1,2,,李洪1,2,,李祥孔1,3,,宋莉妮1,2,,陈松林1.不同时期牙鲆形态性状对体重影响的通径分析及曲线拟合研究.中国水产科学.2016;23(1):64-76.
英文著录格式: CHEN,Honglin1,2,,TIAN,Yongsheng1,,LIU,Feng1,2,,LI,Hong1,2,,LI,Xiangkong1,3,,SONG,Lini1,2,,CHEN,Songlin1.Path analysis and curve estimates of morphometric traits and body weight of Paralichthys olivaceus at different growth stages.No Title Settings.2016;23(1):64-76.

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