从经济和福利的角度来看,将商业鹌鹑养殖业中的鸟类死亡率降至最低很重要。遗传和非遗传因素会影响鸟类的累积生存(CS)。因此,这项研究旨在调查非遗传因素对CSs的影响(从孵化到5(CS1),10(CS2),15(CS3),20(CS4),25(CS5),30(CS6),35(CS7),40(CS8),和45(CS9)天的年龄),并估算了鹌鹑杂交种群中CSs的遗传参数。数据集包括从70个父亲和72个水坝孵化的杂交小鸡的1794条记录。通过ASReml软件使用动物模型分析固定效应,通过吉布斯抽样对包括直接遗传效应在内的6个阈值动物模型进行拟合,采用贝叶斯方法对所有性状进行分析,母亲永久的环境影响,和母体的遗传效应。根据偏差信息标准选择每个性状的最佳拟合模型。舱口编号,舱口的月份,鸡组合对CSs有显著影响,但鸡的性别对CSs影响不显著。然而,女性的存活率高于男性(CS1除外)。有了最好的模型,最高和最低的直接遗传力估计为CS5(0.386)和CS3(0.250),分别。CS1、CS2、CS3和CS4性状的母系遗传效应显著,但母体永久性环境影响仅对CS1显著。CS1至CS4性状的母体遗传力范围估计为0.064至0.111,CS1的永久环境变异与表型变异的比率为0.021。结果表明,考虑到年轻年龄的母体遗传效应,可以通过纠正非遗传因素和遗传选择来提高鸟类的存活率。亮点:•在商业鹌鹑养殖业,从经济和福利的角度来看,鸟类死亡率很重要。•通过控制影响生存的遗传和非遗传因素,可以提高鹌鹑的生存,所以这些因素的知识是必要的。•杂交鸡的组合对累积存活性状具有显著影响。•杂种种群的累积生存性状具有相对较高的遗传多样性,所以这些性状的遗传选择可能是有效的。
Minimizing bird mortality in the commercial quail breeding industry is important from an economic and welfare perspective. Genetic and non-genetic factors can influence on the cumulative survival of the birds (CS). Accordingly, this
study aimed to investigate non-genetic factors on CSs (cumulative survival of the birds from hatch to 5 (CS1), 10 (CS2), 15 (CS3), 20 (CS4), 25 (CS5), 30 (CS6), 35 (CS7), 40 (CS8), and 45 (CS9) days of age), and estimation of the genetic parameters for CSs in crossbred population of quail. Data set included 1794 records from crossbred chicks hatched from 70 sires and 72 dams. The fixed effects were analyzed using an animal model by ASReml software, and all traits were analyzed using Bayesian method via Gibbs sampling by fitting of 6 threshold animal models including the direct genetic effect, the maternal permanent environmental effect, and the maternal genetic effect. The best fitted model for each trait was selected based on the deviance information criteria. Hatch number, the month of hatch, and combination of chickens showed a significant effect on CSs, but the sex of chickens does not have a significant effect on CSs. However, females have higher survival than males (except for CS1). With the best model, the highest and lowest direct heritability was estimated for CS5 (0.386) and CS3 (0.250), respectively. The maternal genetic effect was significant for CS1, CS2, CS3, and CS4 traits, but the maternal permanent environmental effect was significant only for CS1. The range of maternal heritability for CS1 to CS4 traits was estimated from 0.064 to 0.111, and ratio of the permanent environmental variance to phenotypic variance for CS1 was 0.021. The result showed that increasing of the birds\' survival could be performed by correcting non-genetic factors and genetic selection for CSs considering the maternal genetic effects in younger ages. HIGHLIGHTS: • In the commercial quail breeding industry, the bird mortality is important from an economic and welfare perspective. • Improving quail survival can be achieved by controlling the genetic and non-genetic factors affecting on survival, so knowledge of these factors is necessary. • The combination of crossbred chickens had a significant effect on cumulative survival traits. • The Cumulative survival traits in the crossbred population had relatively high genetic diversity, so genetic selection for these traits could be effective.