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Robustness scores in fattening pigs based on routinely collected phenotypes: determination and genetic parameters
Journal of Animal Science ( IF 3.3 ) Pub Date : 2022-05-05 , DOI: 10.1093/jas/skac157
Guillaume Lenoir 1, 2, 3 , Loïc Flatres-Grall 3 , Nicolas C Friggens 1 , Ingrid David 2
Affiliation  

The objective was to determine operational proxies for robustness based on data collected routinely on farm that allow phenotyping of these traits in fattening pigs, and to estimate their genetic parameters. A total of 7256 pigs, from two Piétrain paternal lines (Pie and Pie NN), were tested at the AXIOM boar testing station (Azay-sur-Indre, France) in 2019-2021. During the fattening period (from 75 to 150 days of age), individual performance indicators were recorded (growth, backfat, loin depth, feed intake, feed conversion ratio) together with indicators such as insufficient growth, observable defect, symptoms of diseases and antibiotic and anti-inflammatory injections. These indicators were combined into three categorical robustness scores: R1, R2 and R3. Genetic parameters were estimated using an animal linear model. The robustness score R2 (selectable or not selectable animal) that combined information from status at testing and mortality had the highest heritability estimates of 0.08 ±0.03 for Pie NN line and a value of 0.09 ±0.02 for Pie line, compared to traits R1 and R3. The score R3 that combines information from the score R2 with antibiotic and anti-inflammatory injections presented slightly lower heritability estimates (0.05 ±0.02 to 0.07±0.03). Genetic correlations between R2 and R3 were high and favourable (0.93 ±0.04 to 0.95 ±0.03) and R2 and R3 can be considered as identical with regard to the confidence interval. These two robustness scores were also highly and favourably genetically correlated with initial body weight and average daily gain, and unfavourably correlated with daily feed intake (ranging from 0.73 ±0.06 to 0.90 ±0.08). Estimates of genetic correlations of R2 and R3 with backfat depth and raw feed conversion ratio (not standardized between starting and finishing weights) were moderate and unfavorable (0.20 ±0.13 to 0.46±0.20). A part of these genetic correlations, that are of low precision due to the number of data available, have to be confirmed on larger datasets. The results showed the interest of using routine phenotypes collected on farm to build simple robustness indicators that can be applied in breeding.

中文翻译:

基于常规收集的表型的育肥猪的健壮性评分:测定和遗传参数

目的是根据农场常规收集的数据确定稳健性的操作代理,允许对育肥猪的这些性状进行表型分析,并估计它们的遗传参数。2019-2021 年,在 AXIOM 公猪检测站(法国 Azay-sur-Indre)共检测了来自两个 Piétrain 父系(Pie 和 Pie NN)的 7256 头猪。在育肥期(75 至 150 日龄),记录个体性能指标(生长、背膘、腰部深度、采食量、饲料转化率)以及生长不足、可观察到的缺陷、疾病症状和抗生素等指标和消炎针。这些指标组合成三个类别稳健性得分:R1、R2 和 R3。使用动物线性模型估计遗传参数。与性状 R1 和 R3 相比,结合来自测试状态和死亡率的信息的稳健性评分 R2(可选择或不可选择的动物)对于 Pie NN 系具有最高的遗传力估计值,为 0.08 ±0.03,对于 Pie 系的值为 0.09 ±0.02 . 将评分 R2 中的信息与抗生素和抗炎注射相结合的评分 R3 的遗传力估计值略低(0.05 ±0.02 至 0.07±0.03)。R2 和 R3 之间的遗传相关性很高且有利(0.93 ±0.04 到 0.95 ±0.03),并且 R2 和 R3 可以被认为在置信区间方面是相同的。这两个稳健性得分也与初始体重和平均日增重高度且有利地遗传相关,并且与每日采食量不利地相关(范围从 0.73 ±0.06 到 0.90 ±0.08)。R2 和 R3 的遗传相关性与背膘深度和生料转化率(起始体重和结束体重之间未标准化)的估计值适中且不利(0.20 ±0.13 至 0.46±0.20)。由于可用数据的数量,这些遗传相关性的一部分精度较低,必须在更大的数据集上进行确认。结果表明,有兴趣使用在农场收集的常规表型来构建可应用于育种的简单稳健性指标。
更新日期:2022-05-05
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