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应用重复力模型估计虹鳟生长性状的遗传力和育种值
引用本文:王炳谦,刘宗岳,高会江,白秀娟,谷伟,范兆廷.应用重复力模型估计虹鳟生长性状的遗传力和育种值[J].水产学报,2009,33(2):182-187.
作者姓名:王炳谦  刘宗岳  高会江  白秀娟  谷伟  范兆廷
作者单位:1. 中国水产科学研究院黑龙江水产研究所,黑龙江,哈尔滨,150070
2. 东北农业大学动物科技学院,黑龙江,哈尔滨,150030
摘    要:采用单性状重复观测值动物模型(重复力模型)对中国水产科学研究院黑龙江水产研究所渤海冷水性鱼类试验站5个品系后代的4026尾虹鳟 (Onchorynchus mykiss) 的生长性状(体重、体长和肥满度)进行了遗传参数和育种值的估计,并对各个性状的表型和遗传趋势进行预测。在此模型中考虑了年份-季节固定效应、父本固定效应和母本固定效应;随机效应有个体的加性效应和个体永久环境效应。结果表明:该5个品系虹鳟及后代体重的遗传力为0.35,体长为0.10、肥满度为0.34。个体间的育种值差异较大,仅排名前20位相差近10倍;从不同评定方法的秩相关来看,用综合育种值法与单个性状方法之间存在极显著的相关,其相关度分别为0.998, 0.877, 0.85. -0.071, -0.064和-0.13。用综合育种值对虹鳟个体的选择价值的评定和名次排列, 以及与单个性状的评定名次有着一定程度上的差别。体重、体长和肥满度性状,其表型趋势与遗传趋势基本一致的品系,均可通过表型值进行选择。

关 键 词:虹鳟  生长性状  遗传参数  育种值  重复力模型
收稿时间:2008/7/15 0:00:00
修稿时间:2008/9/17 0:00:00

Estimation of genetic parameters for growth traits in rainbow trout (Oncorhynchus mykiss) with different models
WANG Bingqian,LIU Zongyue,GAO Huijiang,BAI Xiujuan,GU Wei and FAN Zhaoting.Estimation of genetic parameters for growth traits in rainbow trout (Oncorhynchus mykiss) with different models[J].Journal of Fisheries of China,2009,33(2):182-187.
Authors:WANG Bingqian  LIU Zongyue  GAO Huijiang  BAI Xiujuan  GU Wei and FAN Zhaoting
Affiliation:Heilongjiang River Fishery Research Institute
Abstract:Quantitative genetic analyses were performed to study the potential to bteed for improved body weight, body length, and condition factor in rainbow trout (Oncorhynchus mykiss) at different growth stage. In this study, samples were obtained from BaoHai Cold Water Fish Experimental Station of Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, based on 4026 hybrid individuals from the reciprocal crossing among the 5 strains between 2004 and 2006. Genetic parameters and breeding values of growth traits in rainbow trout were estimated with repeatability animal model. The fixed effects, which were included the year season, dam and sire strain, the permanent environment effects and the animal additive genetic effects were calculated. The phenotypic and genetic trends of growth trait in the rainbow trout were also analyzed. Growth traits were estimated utilizing Restricted Maximum Likelihood methods with a two generation pedigree. Results for heritability estimates for body length, body weight, and condition factor were 0.35, 0.10, and 0.34, respectively. The ranks of all kinds of one trait estimated breeding values were greatly different from comprehensive estimated breeding value. And all the genetic evaluation methods also had significant correlations, which were 0.998, 0.877, 0.85, -0.071, -0.064 and -0.13. The genetic and phenotypic tendency of body length, body weight and condition factor was similar, so the selection of phenotypic value is more suitable in the study population.
Keywords:rainbow trout  genetic parameter  EBV  repeatability animal model  MTDFREML
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