Riccardo MORETTI, Andre Campelo ARAUJO, Weverton Jose Lima FONSECA, Paulo Luiz Souza CARNEIRO, Marcos Paulo Gonçalves de REZENDE, Johnny Iglesias Mendes ARAUJO, Carlos Henrique Mendes MALHADO, Barbara Machado CAMPOS, Riccardo BOZZI, Leonardo Gomes SITORSKI

Heritability and genetic correlations between weight gains in Murrah, Mediterranean, and Jaffarabadi buffaloes raised in Brazil, employing Bayesian inference

The request for products of buffalo origin (beef and milk) has been growing throughout the years, and to meet this demandit is necessary to obtain animals with high levels of performance guaranteed through generations. Thus, it is of paramount importanceto know the heritability of the desired traits in order to genetically improve the populations. The objective was to estimate the geneticparameters for weight gain from birth to weaning (BWGW) and from weaning to 12 months of age (WGW12) of Murrah (4675),Mediterranean (405), and Jaffarabadi (766) buffaloes raised in Brazil. Bayesian inference with the bi-trait model was used. The directheritability in the Mediterranean and the Jaffarabadi breeds presented low to moderate estimates whereas the Murrah breed wasmedium for the two traits considered. Heritability estimates for maternal effect were low for BWGW and decreased with advancingage but remained present until 12 months of age. The genetic correlations found between all traits indicate that selection for increasedweight gain at younger ages leads to increased weight gain at 12 months and it is thus possible to select at this age since the weight gainsare highly correlated in all breeds.

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