| 摘要: |
| 经济性状是对虾遗传育种的重要指标, 形态参数对于经济性状的贡献率是选育参数的重要依据。为了研究斑节对虾(Penaeus monodon)表型性状间的相关性及影响体质量的因素组成, 随机选取1 339 尾6 月龄对虾, 对其形态性状(体长、头胸甲长、头胸甲高、头胸甲宽)和体质量性状5 个数量性状进行测量, 并应用相关分析、多元回归、通径分析、决定系数等方法讨论了形态性状对体质量性状的影响。结果表明, 所测各形态性状间的相关性均达到极显著水平(P<0.01); 其中体长(P=0.563)对体质量的直接影响较大, 是影响体质量的主要因素。决定系数分析结果与通径分析结果一致, 各表型性状对体质量的总决定系数Σd=0.925, 表明所选性状是影响体质量的主要性状。通过逐步回归分析方法,经偏回归系数显著性检验, 建立了体质量为因变量, 体长、头胸甲长、头胸甲高和头胸甲宽为自变量的多元回归回归方程:Y= –22.489 + 0.22X1+ 0.191X2+ 0.339X3+ 0.296X4, 为斑节对虾选育提供了理论依据。 |
| 关键词: 斑节对虾(Penaeus monodon) 形态性状 通径分析 多元回归方程 |
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| 基金项目:国家863 计划资助项目(2012AA10A409); 广东省海洋与渔业科技推广专项(A201001B01, A201101B03); 虾产业技术体系(CARS-47); 海南省重点科技计划项目(ZDXM20110016;连云港市科技项目(SF1207) |
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| Effects of morphological characters on body weight of Penaeus monodon |
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| Abstract: |
| In order to study the correlation between phenotypic traits and body weight, five quantitative traits including four morphological traits (body length, carapace length, carapace width, and carapace height) and body weight of 6-month-old Penaeus monodon were measured and analyzed from 1339 randomly collected individuals by correlation analysis, multiple regression analysis, path analysis and determination coefficient analysis. The results showed that there were significant correlations (P<0.01) among the five measured traits. The body length (P=0.563) was the key effective factor, bearing predominant, direct effect and determinacy on the body weight. The trend of determination coefficient analysis was similar to that of path analysis. High total determination coefficient (Σd=0.925) between phenotypic features and body weight indicated that the selected traits were practically useful. The multiple regression equation for estimation of body weight was Y= –22.489 + 0.22X1+ 0.191X2+ 0.339X3+ 0.296X4. |
| Key words: Penaeus monodon morphometric trait path analysis multiple regression equation |
