Produção de leite e intervalo entre partos em diferentes grupos genéticos de bubalinos leiteiros

The goal of the present work was to evaluate the effect of the racial composition of the animals on the interval between births (IEP) and the accumulated milk production at 305 days (PL305) and to estimate the heritability as well as the genetic correlation between PL305 and IEP of female buffaloes and their respective crossbred. Data from 139 females and born between 2007 to 2017 were used. The estimated heritability coefficients were 0.20 and 0.11 for PL305 and IEP, respectively. The genetic correlation between PL305 and IEP was moderate to high and negative (-0.658). Crossbred animals Murrah, Mediterrâneo and Jafarabadi had an effect on the traits analyzed. The PL305 might be used as a useful auxiliary trait in the selection aiming at decreasing IEP in crossbred buffalo females and for the improvement of lactation period and parturition interval in water buffaloes.