Data/hora: 07/06/2024 18:22:30

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 21/07/2022
Data da última atualização: | 21/07/2022
Autoria: | DALTRO, D. dos S.; AMBROSINI, D. P.; NEGRI, R.; SILVA, M. V. G. B.; COBUCI, J. A.
Afiliação: | DARLENE DOS SANTOS DALTRO, Universidade Federal do Rio Grande do Sul; DIEGO PAGUNG AMBROSINI, Instituto Federal do Amapá; RENATA NEGRI, Universidade Federal do Rio Grande do Sul; MARCOS VINICIUS GUALBERTO B SILVA, CNPGL; JAIME ARAUJO COBUCI, Universidade Federal do Rio Grande do Sul.
Título: | Reaction norm model to describe environmental sensitivity in Girolando cattle.
Ano de publicação: | 2022
Fonte/Imprenta: | Livestock Science, v. 263, 105025, 2022.
DOI: | https://doi.org/10.1016/j.livsci.2022.105025
Idioma: | Inglês
Conteúdo: | The aim was to identify the effect of the genotype-environment interaction (GEI) for test-day milk yield (TMDY) in Girolando cows. Data were a total of 614,580 observations from 87,395 first-lactation cows between 2000 and 2014. The animal model (MA) and reaction standard hierarchical models were adjusted with homogeneous and heterogeneous variances in one step (MMRA1p-T-Ho and MMRA1p-T-He, respectively) and two steps (MMNR2pT-Ho and MMNR2p-T-He, respectively), both with Student?s t-distribution. These different models were compared using three goodness-of-fit criteria: deviance information criterion (DIC), deviance based on the Conditional Predictive Ordinate (CPO), and deviance based on the Bayes factors (BF). The MMRA1p-T-Ho, MMNR2p-T-Ho, and MMNR2p-T-He models presented the lowest values for the DIC (75,662.12), CPO (76,276.89), and BF (71,950.11), respectively, indicating good quality-of-fit. Estimates of mean posterior heritability were low to high (0.06 to 0.84) for TMDY. The genetic correlations along the environmental gradient for TDMY showed low to high values (-0.40 to 1.00). The results indicated a presence of GEI Girolando animals, suggesting the possibility of its inclusion in genetic evaluations performed in Brazil.
Palavras-Chave: | Environmental gradient; Genetic selection; Gradiente ambiental; Herdabilidade.
Thesagro: | Gado Leiteiro; Seleção Genética.
Thesaurus Nal: | Dairy cattle; Heritability.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (25728-1) - UPC - AP - DD -  -  -  - DIS