| 摘要: |
| 构建了脊尾白虾(Exopalaemon carinicauda)49个全同胞家系, 包括28个半同胞家系, 分别测定了30日龄和50日龄个体的体长和体重。利用SPSS软件的一般线性模型(GLM)过程, 计算表型变量的方差组分, 估计体长和体重性状的遗传力。结果表明, 脊尾白虾30日龄和50日龄体长的遗传力估计值分别在0.14—0.35和0.07—0.31之间, 脊尾白虾30日龄和50日龄体重的遗传力估计值分别在0.12—0.23和0.14—0.33之间; 雄性遗传方差组分均显著大于雌性遗传方差组分, 说明雄性遗传方差组分存在显著的父本效应。经过t检验, 父系半同胞、母系半同胞方差组分估计的遗传力均未达到显著水平, 全同胞方差组分估计的遗传力达到极显著水平。因此可以认为基于全同胞方差组分估计的遗传力是对脊尾白虾两个生长阶段体长和体重狭义遗传力的无偏估计值。本研究结果表明脊尾白虾体长和体重性状属于中度遗传力, 选择育种对于脊尾白虾早期生长的改良具有较大潜力。 |
| 关键词: 脊尾白虾 体长 体重 遗传力 |
| DOI：10.11693/hyhz201304020020 |
| 分类号: |
| 基金项目:国家高技术研究发展计划项目资助, “主要养殖甲壳类良种培育”, 2012AA10A409 号; 国家虾产业技术体系项目资助, CARS-47号; 中国水产科学研究院基本科研业务费资助, 2013A0701号。 |
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| HERITABILITY OF BODY LENGTH AND WEIGHT FOR THE RIDGETAIL WHITE PRAWN EXOPALAEMON CARINICAUDA |
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LI Ji-Tao, LI Jian, LIU Ping, CHEN Ping, HE Yu-Ying, GAO Bao-Quan
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Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
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| Abstract: |
| In this study, the heritabilities of body length and weight in the ridgetail white prawn were estimated by intra-group correlation of full-sibs at 30 and 50 days stages after hatching. A total of 82 maturing shrimp were taken from selected population. 49 sires and 294 dams were mated in 1♂×6♀, and 49 full-sib families were produced, including 28 half-sib families. 30 individuals were randomly sampled in harvest on day 30 and 50 in age from each family and body length and weight were measured. Causal components of phenotypic variance were calculated with the GLM procedure of SPSS software. The results show that the heritability of body length at 30 and 50 days of age were 0.14—0.35 and 0.07—0.31, and the heritability of body weight was 0.12—0.23 and 0.14—0.33, respectively. No significant difference was found in the heritability between maternal and paternal genetic variance. However, the difference was significant in components variance of full-sibs within sires and dams. The results prove that the values from components of variance of full-sibs within sires and dams were precise and unbiased for the body length and weight. The study showed that the heritabilities for body length and weight were moderate, and selective breeding would improve greatly early growth of E. carinicauda. |
| Key words: Exopalaemon carinicauda body length body weight heritability |
