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    叶健, 胡晓湘, 边成, 曾谨勇, 张承华, 郑恩琴, 蔡更元, 刘德武, 王爱国, 吴珍芳. 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[J]. 华南农业大学学报, 2017, 38(1): 1-4. DOI: 10.7671/j.issn.1001-411X.2017.01.001
    引用本文: 叶健, 胡晓湘, 边成, 曾谨勇, 张承华, 郑恩琴, 蔡更元, 刘德武, 王爱国, 吴珍芳. 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[J]. 华南农业大学学报, 2017, 38(1): 1-4. DOI: 10.7671/j.issn.1001-411X.2017.01.001
    shu
    YE Jian, HU Xiaoxiang, BIAN Cheng, ZENG Jinyong, ZHANG Chenghua, ZHENG Enqin, CAI Gengyuan, LIU Dewu, WANG Aiguo, WU Zhenfang. Estimation of genetic parameters of major growth traits and existing problems in breeding of Large White pigs[J]. Journal of South China Agricultural University, 2017, 38(1): 1-4. DOI: 10.7671/j.issn.1001-411X.2017.01.001
    Citation: YE Jian, HU Xiaoxiang, BIAN Cheng, ZENG Jinyong, ZHANG Chenghua, ZHENG Enqin, CAI Gengyuan, LIU Dewu, WANG Aiguo, WU Zhenfang. Estimation of genetic parameters of major growth traits and existing problems in breeding of Large White pigs[J]. Journal of South China Agricultural University, 2017, 38(1): 1-4. DOI: 10.7671/j.issn.1001-411X.2017.01.001
    shu

    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

    Estimation of genetic parameters of major growth traits and existing problems in breeding of Large White pigs

      摘要
    • 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 estimate genetic parameters of growth traits of Large White pigs in Wens Group, and study the effects of change in method for measuring backfat (A to B ultrasonic) and variation in final body mass (age at 100 kg to age at 115 kg body mass) on pig breeding.
      Method Single/multi-trait animal model and DMU software were used to estimate genetic variance and variance of common litter effects for age at 100 kg body mass (AGE) and backfat thickness at 100 kg body mass (BF). We evaluated the pearson and spearman correlations between estimated breeding value (EBV) from newly measured individuals in 2016 and EBV from normal genetic evaluation under the condition of 100 kg final body mass (AGE-100) or B ultrasonic (BF-B).
      Result The estimates of heritabilities were 0.21 and 0.41, the common litter effects were 0.27 and 0.15 for AGE and BF respectively, and the single-model and multi-model were generally consistent. Under the condition of AGE-100 or BF-B, the pearson correlations were 0.96 and 0.94, the spearman correlations were 0.96 and 0.92 for EBV from newly measured individuals and EBV from normal genetic evaluation respectively, and the single-model and multi-model were generally consistent.
      Conclusion Change in method for measuring backfat has a smaller effect on breeding than compared change in final body mass. The correction formula should be re-selected.

       

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