Resumo

SERENO, José Robson Bezerra et al. Age and weight estimate on the first breeding in the Brazilian Pantanal heifers. Pesq. agropec. bras. [online]. 2001, vol.36, n.12, pp. 1561-1565. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2001001200014.

The objective of this work was to estimate the age and live weight at the first breeding in the Nelore (N), Pantaneira (P), and crossbreeding Pantaneira x Nelore (PxN) heifers. A total of 98 females was used for treatments, 51, 24 and 23 from N, P and PxN heifers, respectively. The statistical analysis did not show any significant difference (P = 0.3595) to live weight in the first breeding among breeds. The variance analysis did not show any significant difference (P = 0.307) of age among breeds, showing 3.5, 3.4 and 3.2 years to P, N and ½PxN heifers, respectively.

Palavras-chave : animal breeding; crossbred race; animal genetic resources.