Reis Arícia Chaves Zanetti, Marques Daniele Botelho Diniz, da Silva Delvan Alves, da Silva Alessandra Alves, Carrara Eula Regina, Gaya Leila de Genova, Lopes Paulo Sávio, Brito Luiz F, Veroneze Renata
Federal University of Viçosa (UFV), Department of Animal Science, Viçosa, MG, Brazil.
Federal University of Viçosa (UFV), Department of Animal Science, Viçosa, MG, Brazil.
Poult Sci. 2025 May 16;104(8):105299. doi: 10.1016/j.psj.2025.105299.
This study aimed to investigate the impact of genotype-by-environment interaction (GEI) on body weight (BW) in meat quails. BW data from ten generations, recorded on 7 (BW7), 14 (BW14), 21 (BW21), 28 (BW28), 35 (BW35), and 42 (BW42) days after hatching were used for the analyses. A temperature and humidity index (THI) divided into two classes (less or equal than 68 - THI1 and greater than 68 -THI2) was used as the environmental descriptor. Variance components and genetic parameters, including heritability and genetic correlation estimates, were computed for BW considering these two classes of THI. The rank correlation coefficients and percentage of individuals in common in the top 1 % animals (classified by breeding values in THI2) for BW were calculated. Also, the top 10 % with at least 13 offspring and the pattern of the top 10 breeding value animals were analyzed across THI classes. The heritability estimates ranged from 0.22 (for BW42 at THI1) to 0.49 (for BW28 and BW35 at THI1). In addition, the genetic correlations ranged from 0.16 (for BW7 between THI1 and THI2) to 0.98 (to BW42 between THI1 and THI2). The genetic correlation between THI1 and THI2 was low for BW7 (0.16), moderate for the two following weeks, i.e., BW14 and BW21 (0.65 and 0.55, respectively), and high for BW28, BW35, and BW42 (0.94, 0.98, and 0.96, respectively). The rank correlations indicated reranking of younger birds (BW7, BW14, and BW21), reflecting variations in breeding values across THI classes. The quails kept their ranking position from 28 days onwards when comparing the evaluated THI classes. However, younger birds, before 28 days, exhibited reranking across the different THI ranges. This study reinforces the relevance of the effect of THI on animal performance, highlighting the need to consider them in analyses for selecting superior and more resilient animals.
本研究旨在调查基因型与环境互作（GEI）对肉鹌鹑体重（BW）的影响。分析使用了孵化后7天（BW7）、14天（BW14）、21天（BW21）、28天（BW28）、35天（BW35）和42天（BW42）记录的十代BW数据。温度湿度指数（THI）分为两类（小于或等于68——THI1和大于68——THI2）作为环境描述指标。考虑这两类THI，计算了BW的方差成分和遗传参数，包括遗传力和遗传相关估计值。计算了BW在前1%动物（按THI2中的育种值分类）中的等级相关系数和共同个体百分比。此外，还分析了至少有13只后代的前10%以及前10个育种值动物在不同THI类别的模式。遗传力估计值范围从0.22（THI1时的BW42）到0.49（THI1时的BW28和BW35）。此外，遗传相关范围从0.16（THI1和THI2之间的BW7）到0.98（THI1和THI2之间的BW42）。THI1和THI2之间的遗传相关对于BW7较低（0.16），在接下来的两周即BW14和BW21时中等（分别为0.65和0.55），对于BW28、BW35和BW42较高（分别为0.94、0.98和0.96）。等级相关表明幼鸟（BW7、BW14和BW21）的排名重新排序，反映了不同THI类别中育种值的变化。在比较评估的THI类别时，鹌鹑从28日龄起保持其排名位置。然而，28日龄之前的幼鸟在不同的THI范围内表现出重新排名。本研究强化了THI对动物性能影响的相关性，强调在选择优良和更具适应性动物的分析中需要考虑它们。
