Investigation of Reciprocal Cross Effects in F2 Nellore–Angus Calves

The objectives of this study were to analyze calf performance traits and sex ratio frequencies in reciprocal Bos indicus–Bos taurus F2 Nellore–Angus calves (n = 539). produced using Angus-sired (AN) Nellore-sired (NA) F1 sires dams, resulting four cross types. Calf weight analyzed mixed models. Deviations from 50% ratios tested against expected binomial thresholds. Dam type influenced Julian birth date (p < 0.05) with AN cows born 5 6 days earlier than NA cows. Sire dam affected parents approximately 2.5 kg heavier those parents; weaning did not differ for parent type. However, an interaction between sire types 0.038) where x 8 lighter other crosses. distribution at 0.036) 0.026) producing over 66% male calves. These results suggest differences due parental line descent typically observed among crosses can persist subsequent generations.