| 摘要: |
| 应用数量遗传学原理和全同胞组内相关法估计了三疣梭子蟹80 日龄和120 日龄体重的遗传力。实验中的400 只亲蟹均来自人工养殖的选育群体。通过群体间杂交, 构建了37 个全同胞家系包括13 个半同胞家系, 分别测定了80 日龄和120 日龄时大约30 个个体的体重。利用SPSS 软件的一般线性模型(GL.M)过程, 计算表型变量的方差组分, 估计体重性状的遗传力。结果表明, 三疣梭子蟹80 日龄和120 日龄体重的遗传力估计值分别在0.42—0.64 和0.25—0.39 之间。雌性遗传方差组分均显著大于雄性遗传方差组分, 说明雌性遗传方差组分存在显著的母性效应。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三疣梭子蟹两个发育阶段狭义遗传力的无偏估计值, 估计值分别为0.53 和0.35。说明三疣梭子蟹体重属于中度遗传力, 对其选择育种具有较大的潜力。
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| 关键词: 三疣梭子蟹, 体重, 遗传力 |
| DOI：10.11693/hyhz201003004004 |
| 分类号: |
| 基金项目:国家高技术研究发展计划(863 计划)项目资助, 2006AA10A406 号; 国家自然科学基金项目, 30871933 号; 青岛市科技计划项目, 07-2-3-5-jch 号 |
附件 |
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| HERITABILITY OF BODY WEIGHT IN PORTUNUS TRITUBERCULATUS |
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GAO Bao-Quan1, LIU Ping1, LI Jian1, LIU Lei1, DAI Fang-Yu1, WANG Xue-Zhong2
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1.Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;2.Changyi Haifeng Aquiculture Co. Ltd
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| Abstract: |
| With the rapid expansion and intensification of Portunus trituberculatus culture, various problems, such as diseases, larval degeneration, and natural resource depletion, have incurred economic losses, Therefore, study on selective breeding and heritability are important. In this paper, the heitability of P. trituberculatus in body weight was estimated by intra-group correlation of full-sibs. A total of 400 matured crabs were taken from culture populations. 100 sires and 300 dams were mated in 1♂×3♀, and 13 half-sib families and 37 full-sib families were produced. About 30 individuals were randomly sampled in harvest on day 80 and 120 in age from each family and body weight measured. Causal components of phenotypic variance were calculated with the GLM procedure of SPSS software. Results show that the heritability on day 80 and 120 ranged 0.42—0.64 and 0.25—0.39, 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 values 0.53 and 0.35 on day 80 and 120, respectively, from components of variance of full-sibs within sires and dams were precise and unbiased for the body weight. The study shows that the heritability in body weight of P. trituberculatus is moderate.
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| Key words: Portunus trituberculatus, Body weight, Heritability, Full-sib |
