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首页> 外文期刊>Turkish Journal of Veterinary and Animal Sciences >Estimates of Genetic Parameters for Direct and Maternal Effects with Six Different Models on Birth and Weaning Weights of Turkish Merino Lambs
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Estimates of Genetic Parameters for Direct and Maternal Effects with Six Different Models on Birth and Weaning Weights of Turkish Merino Lambs

机译:六种不同模式对土耳其美利奴羊羔出生和断奶体重的直接和母体影响的遗传参数估计

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摘要

The aim was to estimate the genetic parameters for birth and weaning weights of Turkish Merino lambs by separating direct genetic, maternal genetic and maternal permanent environmental effects Data and pedigree information of the Turkish Merino sheepused in this study were collected at the Marmara Animal Breeding Research Institute from 1995 to 2001. Variance components for birth and weaning weights were estimated by the REML technique. Six different animal models were fitted by including or excluding maternal effects. Depending on the model, h_d~2 varied from 0.092 to 0.327 for birth weight and from 0 057 to 0.120 for weaning weight. Estimates of m~2 ranged from 0.101 to 0.271 for birth weight and from 0 to 0.083 for weaning weight. The maternal permanent environmental effect was significant for both traits. When fitted in models, estimates of r_(am) were high and negative for birth and weaning weights. In conclusion, maternal effects on birth and weaning weights of Turkish Merino lambs were significant and may be taken into consideration in any selection program on this breed.
机译:目的是通过分离直接遗传,母体遗传和母体永久环境影响来评估土耳其美利奴羊羔的出生和断奶体重的遗传参数。本研究中使用的土耳其美利奴羊的数据和家谱信息是在马尔马拉动物育种研究所收集的从1995年到2001年。通过REML技术估算出生体重和断奶体重的方差分量。通过包括或不包括母体效应来拟合六种不同的动物模型。根据模型的不同,h_d〜2的出生体重从0.092到0.327不等,而断奶体重从057到0.120不等。出生体重的m〜2估计值在0.101至0.271之间,而断奶体重的估计值在0至0.083之间。产妇的永久性环境影响对这两个性状均具有重要意义。当拟合模型时,r_(am)的估计值高,出生和断奶体重为负。总之,母体对土耳其美利奴羔羊羔的出生和断奶体重的影响很大,在该品种的任何选择计划中都可以考虑。

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