| 应用动物模型对罗氏沼虾育种估计的差别分析 |
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| 引用本文： | 罗坤,孔杰,栾生,杨国梁,王军毅,张宇飞.应用动物模型对罗氏沼虾育种估计的差别分析[J].海洋水产研究,2008,29(3). |
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| 作者姓名： | 罗坤 孔杰 栾生 杨国梁 王军毅 张宇飞 |
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| 作者单位： | 1. 农业部海洋渔业资源可持续利用重点开放实验室,中国水产科学研究院黄海水产研究所,青岛266071
2. 浙江南太湖淡水水产种业有限公司,湖州,313001 |
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| 基金项目： | 农业部优势农产品重点技术示范推广项目 |
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| 摘 要： | 为准确评估罗氏沼虾的育种值,利用罗氏沼虾106个家系中2628尾个体的体重资料,分别考虑日龄、性别和雌虾出池时是否抱卵等因素,设计了4种单性状动物模型,应用BLUP法估计个体的体重育种值。4种模型所估计的体重遗传力差别较大,遗传力范围在0.02～0.13之间。分析表明,家系混养前日龄与家系出池体重测定值存在极显著的相关(r=0.434,P<0.01),说明家系混养前日龄对混养后家系个体的体重有显著影响,提示在动物模型设计时,应该考虑家系混养前日龄作协变量;在考虑性别效应、雌虾出池时的抱卵效应,并以家系混养前日龄为协变量,获得的育种值估计较其他模型更为准确。实验还对育种值选择与表型值选择的效率进行了比较。结果表明,依据育种值选择与依据表型值选择的结果存在着较大差异,两种选择方法选取的前53个家系育种值的平均值分别为0.70和0.58g,前者比后者提高20.7%,提示依据育种值的选择效率要高于表型值选择效率。
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| 关 键 词： | 罗氏沼虾 育种值 BLUP 动物模型 |
Difference analysis of breeding value estimation for Macrobrachium rosenbergii by animal models |
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| LUO Kun,KONG Jie,LUAN Sheng,YANG Guo-liang,WANG Jun-yi,ZHANG Yu-fei.Difference analysis of breeding value estimation for Macrobrachium rosenbergii by animal models[J].Marine Fisheries Research,2008,29(3). |
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| Authors: | LUO Kun KONG Jie LUAN Sheng YANG Guo-liang WANG Jun-yi ZHANG Yu-fei |
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| Abstract: | For accurate estimation of the breeding value of Macrobrachium rosenbergii,four single trait animal models were designed involving factors such as day-age,sex and female egg-carrying effect,etc.Breeding values for body weight of 2 628 individuals in 106 M.rosenbergii families were estimated using linear unbiased prediction(BLUP)procedures.There was great difference between the heritability(ranged between 0.02 ~ 0.13)of body weight estimated by the four animal models.A highly significant correlation(r=0.434,P<0.01)was found between the family age before co-culture and the final body weight at harvest,indicating that the age of families significantly affected their weight gain during co-culture;and it was suggested that family age be considered as a covariate when an animal model was designed.The animal models using sex or egg-carrying effect as fixed variables and the family age as a covariate,obtained more accurate estimation of breeding values than the other models.Comparison of the efficiency of selection based on breeding value or phenotypic value revealed great difference:average breeding values of the two selection methods for the top 53 M.rosenbergii families were 0.70 g and 0.58 g,respectively,representing a 20.7% higher efficiency in the former.It was suggested that,the efficiency of breeding value-based selection was higher than that of phenotypic selection. |
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| Keywords: | Macrobrachium rosenbergii Breeding value BLUP Animal model |
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