| 摘要: |
| 采用多元线性回归和通径分析方法, 研究企鹅珍珠贝主要经济性状对体重的影响效果。结果表明, 6 个性状间的相关系数均达到极显著水平(P<0.01); 通径分析表明各经济性状对体重的直接影响效果为软体部重(0.726)>壳长(0.146)>壳高(0.107)>闭壳肌重(0.058)>壳宽(0.049), 壳长、壳高、闭壳肌重和壳宽对体重的影响主要通过软体部重实现的, 其间接作用依次为 0.459、0.371、0.431 和0.462; 各经济性状对体重的直接决定效应依次为软体部重(0.527)>壳长(0.021)>壳高(0.011)>闭壳肌重(0.003)>壳宽(0.002), 壳长通过软体部重对体重的间接决定效应最大为 0.134。 经多元回归分析, 采用逐步回归方法, 剔除了偏回归系数不显著的壳宽, 建立了壳长、壳高、闭壳肌重和软体部重对体重的最优回归方程: Y =－26.211 + 0.557X1 + 0.257X2 + 0.668X3 + 1.429X4, R2=0.921 (P<0.01)。 |
| 关键词: 企鹅珍珠贝, 体重, 经济性状, 相关系数, 通径分析, 决定系数 |
| DOI：10.11693/hyhz201106008008 |
| 分类号: |
| 基金项目:热带海产无脊椎动物养殖工程研究中心建设项目, GCZX-A0909 号; 农业部“948”项目“优质南洋珍珠生产关键技术引进与开发利用”, 2010-Z33 号 |
附件 |
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| EFFECTS OF MAIN ECONOMIC TRAITS ON BODY WEIGHT OF PTERIA PENGUIN |
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LI Zhi-Min, LIU Zhi-Gang, WANG Hui, TANG Xi-Yue
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Fisheries College of Guangdong Ocean University
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| Abstract: |
| Body weight is both an important objective trait and a direct reflection of performance of production for selective breeding. However, body weight variability is often lead to deviation of trait selection; therefore, the purpose of this study is to find breeding objective traits which possess stable phenotype and with greatest correlation to body weight trait. Effects of main economic traits on body weight of Pteria penguin were studies by adopting multiple regression analysis and path analysis. The results showed that the corresponding path coefficients between the 6 main economic traits were highly significant (P<0.01). By path analysis, the direct effects of various economic traits on body weight were edible-part weight (0.726)>shell length (0.146)>shell height (0.107)>adductor weight (0.058)>shell width (0.049). And the economic traits including shell length, shell height, adductor weight, and shell width have indirect effects on body weight through mainly the edible-part weight. Their indirect effects were 0.459, 0.371, 0.431, and 0.462, respectively. The direct determination effects of various economic traits on body weight were edible-part weight (0.527)>shell length (0.021)>shell height (0.011)>adductor weight (0.003)>shell width (0.002). Shell length has the maximum indirect determination effects (0.134) on body weight through the edible-part weight. The shell width, with insignificant partial regression coefficient, was excluded, so the best multiple regression equation, viz. the relation of body weight to shell length (X1), shell height (X2), adductor weight (X3), and edible-part weight (X4) was established as Y =-26.211 + 0.557X1 + 0.257X2 + 0.668X3 + 1.429X4, R2 = 0.921 (P<0.01). |
| Key words: Pteria penguin, Body weight, Economic trait, Correlation coefficient, Path analysis, Determination coefficient |
