To increase the permanence of animals in dairy herds by decreasing involuntary slaughter contributes to the development of a sustainable production system. This sustainability is the result of reduced sanitary costs, increased productive life of females, and increased animal welfare. This study aims to estimate genetic parameters for productive lifespan (PL) and functional productive life (FPL) associated with the following economically important traits: milk (MY), fat (FY), and protein yields (PY); fat percentage (%F) and protein percentage (%P); age at first calving (AFC); and calving interval (CI) in dairy buffaloes. The productive lifespan was defined at 48 (PL48), 60 (PL60), and 72 (PL72) months of age. The (co) variance components were estimated using the multi-trait model and the Gibbs2F90 software. To determine the selection effects for FPL72, a deterministic simulation was performed to obtain the direct and indirect genetic gains. Selection indices were calculated, including or excluding FPL72, considering the...

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