| 光合选育系中华绒螯蟹形态性状对体质量的影响分析 |
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| 引用本文： | 郑岩,刘谞,孙娜,耿丹,李杨.光合选育系中华绒螯蟹形态性状对体质量的影响分析[J].水产科学,2021(2):172-178. |
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| 作者姓名： | 郑岩 刘谞 孙娜 耿丹 李杨 |
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| 作者单位： | 盘锦光合蟹业有限公司 |
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| 基金项目： | 辽宁省重点研发计划指导项目(2017203007). |
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| 摘 要： | 随机选取光合选育系成体中华绒螯蟹500只,雌(95.27±14.60) g]、雄(145.03±23.46) g]各250只,逐一测量头胸甲长( x 1 )、背甲后半长( x 2 )、体高( x 3 )、额宽( x_( 4) )、第1侧齿宽( x 5 )、第3步足长节长( x 6 )、第3步足前节长( x_( 7) )和第4步足指节长( x 8 )共8个形态学指标及其体质量( y )。采用相关分析和通径分析,计算形态性状对体质量的相关系数、通径系数和决定系数,进而剖分各性状的影响程度。试验结果表明,光合选育系中华绒螯蟹各参数变异系数体质量均最大,雄蟹为16.17%,雌蟹为15.32%,各形态性状中体质量具有较大的选择潜力。各形态性状间头胸甲长与背甲后半长相关系数最大,雄蟹为0.830,雌蟹为0.893。各形态性状与体质量的相关性中,头胸甲长的相关系数最大,雄蟹为0.806,雌蟹为0.954。各形态性状对体质量都是间接影响大于直接影响,对体质量的间接影响依次为雄蟹头胸甲长>第3步足长节长>额宽>体高,雌蟹为头胸甲长>第3步足长节长>体高>额宽。各形态性状单独对体质量的决定程度头胸甲长最大,雄蟹为32.1%,雌蟹为53.8%,两两性状共同对体质量的决定程度第3步足长节长和头胸甲长的协同作用最大,雄蟹为20.2%,雌蟹为14.8%,头胸甲长和第3步足长节长对于体质量是重要的决定性指标。体质量与形态性状间的最优回归方程:雄蟹, y =-224.598+3.826 x_( 1 )+1.846 x 6 +2.866 x 4 +2.14 x 3;雌蟹, y =-166.408+3.734 x _(1 )+0.754 x_( 6) +0.817 x _(3 )-1.014 x_( 4) 。
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| 关 键 词： | 中华绒螯蟹 形态形状 体质量 相关 通径分析 多元回归分析 |
Correlation Analysis of Morphometric Traits on Body Weight in Guanghe Breeding Strain of Chinese Mitten Crab Eriocheir sinensis |
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| ZHENG Yan,LIU Xu,SUN Na,GENG Dan,LI Yang.Correlation Analysis of Morphometric Traits on Body Weight in Guanghe Breeding Strain of Chinese Mitten Crab Eriocheir sinensis[J].Fisheries Science,2021(2):172-178. |
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| Authors: | ZHENG Yan LIU Xu SUN Na GENG Dan LI Yang |
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| Institution: | (Liaoning Provincial Key Laboratory of Chinese Mitten Handed Crab Eriocheir sinensis Breeding,Panjin Guanghe Crab Industry Co.,Ltd.,Panjin 124200,China) |
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| Abstract: | Carapace length ( x 1), postcarapace length ( x 2 ), body height ( x 3 ), frontal width ( x 4 ), first side tooth width ( x 5 ), meropodit length of the third periopod ( x 6 ), propodit length of the third periopod ( x 7 ), dactylopodit length of the fourth periopod ( x_( 8) ) and body weight ( y ) were measured in 500 samples, 250 females (95.27±14.60) g] and males (145.03±23.46) g], of adult Guanghe breeding strain of Chinese mitten crab Eriocheir sinensis collected from Panjin Guanghe Crab Industry Co., Ltd., Panjin, China. The correlation coefficient, path coefficient, and determination coefficient of body weight with morphological traits as independent variables were calculated by correlation analysis and path analysis, and then the influence of each trait was divided. The results showed that there was the maximal coefficient of variation in body weight, 16.17% for male and 15.32% for female, among the all parameters in Guanghe breeding strain of Chinese mitten crab, showing great potential for selection by body weight in each morphological trait. The maximal correlation coefficient, 0.830 for male and 0.893 for female, was observed between carapace length and postcarapace lengtht among the all traits. Among the correlations between various morphological traits and body weight, the correlation coefficient of the carapace length was the largest, 0.806 for male and 0.954 for female. There was greater indirect impact of all morphological traits on body weight than the direct impact of all morphological traits on body weight, with the descending order of indirect effects on body weight as x _(1 )> x 4 > x 3 > x 6 in male, and x 1 > x 3 > x 6 > x_( 4) in female. Carapace length was the most important factor determining body weight in each morphological character, 32.1% for male and 53.8% for female. The propodit length of the third periopod and the carapace length showed the greatest synergistic effect on the body weight,20.2% for male and 14.8% for female. The x 7 and x 1 were important decisive indicators for body weight, with the optimal regression equation between body weight and morphological characters as y =-224.598+3.826 x 1 +1.846 x _(6 )+ 2.866 x_( 4) +2.14 x_( 3) in male, and y = -166.408 +3.734 x 1 +0.754 x 6 +0.817 x 3 -1.014 x_( 4) in female. |
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| Keywords: | Chinese mitten crab Eriocheir sinensis morphological characterics body weight correlation path analysis multiple regression analysis |
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