大白猪主要生长性状的遗传参数估计及育种中存在问题的探讨

发布时间：2018-05-27 05:29

本文选题：猪 + 生长性状　；参考：《华南农业大学学报》2017年01期

【摘要】：【目的】分析温氏某育种场大白猪主要生长性状遗传参数,并探讨不同背膘测定方法的变化(从A超到B超)以及终测体质量的变化(从达100 kg体质量日龄到达115 kg体质量日龄)对育种的影响。【方法】利用DMU软件和单/多性状动物模型计算了达100 kg体质量日龄(AGE)和100 kg体质量背膘厚(BF)的加性方差和窝效应方差,计算各性状遗传力,并分别评估了在只有终测体质量100 kg左右(AGE-100)或只有B超(BF-B)情况下,2016年新测定个体估计育种值(EBV)与正常遗传评估EBV的泊松相关和秩相关。【结果】AGE和BF遗传力分别为0.21和0.41,窝效应分别为0.27和0.15,单/多性状模型基本保持一致;此外,在去除终测体质量115~130 kg内数据或A超测定数据的情况下,新终测个体EBV与正常情况计算EBV的泊松相关分别为0.96和0.94,秩相关分别为0.96和0.92,单/多性状模型基本保持一致。【结论】调整背膘测定方法比调整终测体质量对选种影响小,应该重新选择校正公式。
[Abstract]:[objective] to analyze the genetic parameters of main growth traits of large white pigs in a breeding farm, The effects of different backfat determination methods (from A ultrasound to B ultrasound) and final body mass (from 100kg body mass to 115kg body mass days) on breeding were also discussed. [methods] using DMU software and single body mass. The additive variance and litter effect variance of 100 kg body weight age (age) and 100 kg body weight backfat thickness (BF) were calculated by multiple trait animal model. To calculate the heritability of each trait, In the case of only 100 kg body mass measured by AGE-100 or only B ultrasound BF-B), the new estimated breeding value of individuals in 2016 was evaluated as Poisson correlation and rank correlation with normal genetic evaluation of EBV. [results] AGE and BF heritability scores were evaluated. The litter effect was 0.27 and 0.15 respectively, and the single / multiple trait model was basically consistent. In addition, in the case of removal of data within 115g of the final mass of the body or data from A-mode measurements, The Poisson correlation and rank correlation of EBV and EBV were 0.96 and 0.94, respectively. The single / multiple trait model was basically consistent. [conclusion] the adjusted backfat method has less influence on seed selection than adjusting the body mass of the final test, and the rank correlation is 0.96 and 0.92, respectively. The correction formula should be re-selected.
【作者单位】：华南农业大学动物科学学院/国家生猪种业工程技术研究中心;中国农业大学生物学院;广东温氏食品集团股份有限公司;中国农业大学动物科技学院;
【基金】：广东省科技计划项目(2015B020231010) 广东省现代农业产业技术体系生猪创新团队(2016LM1101;2016LM1104)
【分类号】：S828

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