杂谈猪的遗传改良——正确认识国外遗传评估体系对我国进口种猪的评估

发布时间：2018-05-19 19:46

本文选题：引种 + 杜洛克猪　；参考：《中国畜牧杂志》2017年10期

【摘要】：我国每年都从国外引进大量种猪。引种时供种方所提供的种猪遗传评估信息的真实性与加入国外遗传评估体系(如NSR)的有效性值得探讨。本研究以从美国引种并且又加盟美国NSR的某国家级核心育种场为例,针对达目标体重日龄、活体背膘厚、活体眼肌面积、估计瘦肉率等4个性状,进行了系统化的相关分析。结果表明:引种时NSR提供的遗传评估信息真实但用途不大。在达目标体重日龄上,NSR估计的育种值与自行估计值呈极显著负相关,意味着根据NSR的结果进行选择,结果可能背道而驰;其他性状均为极显著正相关。但是,因为选择指数由这些性状的育种值共同加权组合而成,1个性状的估计育种值存在问题,将导致整个指数不可靠,这意味着不能盲目进行跨国评估。造成这一结果的原因是遗传与环境的互作,但对此有必要做进一步分析。
[Abstract]:China imports a large number of pigs from abroad every year. The authenticity of the genetic assessment information provided by the donor and the effectiveness of joining the foreign genetic assessment system (such as NSRs) should be discussed. Taking a national core breeding farm introduced from the United States and joined the United States NSR as an example, a systematic correlation analysis was carried out for four traits, such as the age of reaching the target body weight, the backfat thickness of the living body, the area of the living eye muscle, and the estimation of the lean meat rate. The results showed that the genetic evaluation information provided by NSR at the time of introduction was true but not useful. There was a significant negative correlation between the estimated breeding value and the self-estimated value at the age of reaching the target body weight, which means that the selection based on the results of NSR may run in the opposite direction, and the other traits are highly significant positive correlation. However, because the selection index is combined by the breeding value of these traits, the estimation of breeding value of one trait has some problems, which will lead to the whole index being unreliable, which means that the transnational evaluation cannot be blindly carried out. The reason for this result is the interaction between heredity and environment, but it is necessary to make further analysis.
【作者单位】：上海交通大学农业与生物学院;上海市兽医生物技术重点实验室;
【基金】：资助项目:上海市生猪产业技术体系[沪农科产字(2014~2018)第6号] 浙江省地方猪种配套系选育与产业化—基于金华猪的配套系选育(2016C02054-2)
【分类号】：S828.2

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