02072naa a2200277 a 450000100080000000500110000800800410001902400540006010000220011424501060013626000090024252012550025165000170150665000170152365000180154065000240155865300270158265300220160965300240163165300180165570000210167370000140169470000230170870000180173177300450174921448502022-07-21       2022    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.livsci.2022.1050252DOI1 aDALTRO, D. dos S.  aReaction norm model to describe environmental sensitivity in Girolando cattle.h[electronic resource]  c2022  aThe 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.  aDairy cattle  aHeritability  aGado Leiteiro  aSeleção Genética  aEnvironmental gradient  aGenetic selection  aGradiente ambiental  aHerdabilidade1 aAMBROSINI, D. P.1 aNEGRI, R.1 aSILVA, M. V. G. B.1 aCOBUCI, J. A.  tLivestock Sciencegv. 263, 105025, 2022.