Preliminary researches regarding the conservation of endangered local cattle to be abandoned and the achieving of meat hybrids throughout the hybridization with Romanian breeds

Abstract

Studies were performed on first generation meat hybrids, from the Bălţată cu Negru Românească (BNR) dairy cattle, into four experimental groups of five animals /group, in relation to meat bulls breeds from which the frozen semen material used for cows artificial insemination, respectively: Group E1- Limousine (Li), E2 - Aberdeen Angus (AA), E3 - Blue Blanch Belgian (BBB) and E4 - Charolaise (CH). The hybrids obtained from the experimental groups were observed in terms of dynamic growth and development through biometric measurements and periodic weightings 3 months intervals until 12 months of age. Average Daily Gain (ADG) recorded different variations in report to age and breed: at six months old, between 418.52 ± 60.97 g (Group E3 -BBB) and 486.67 ± 108.66 g (Group E2 - AA), at 12 months old, between 997.22 g (Group E2 – AA) and 1311.11 g (Group E3 -BBB). Slaughter rate at 12 months showed variations in relation to breed and thermal regime, so in hot regime the values ranged between 56.62 % (BNR x AA) and 60.60 % (BNR x BBB) and in cold regime (to 24 hours) between 55.68 % (BNR x AA) and 59.73 % (BNR x BBB). Carcasses development indicators had values in most cases in favor of BNR x AA hybrids than BNR x BBB hybrids, with significant differences (P ≤ 0.01) regarding the width index (201.43 cm to 175.84 cm) and pulp development index (129.27 cm to 110.64 cm). From results analysis it can be concluded that in dangered local cattle, to be abandoned because of productive reform or not relevant point of view of milk production can be used in first generation for hybridization with meat breeds in obtaining meat hybrids with morphological features, slaughter rate and carcass structure from superior quality categories than the maternal breed.