Abstract

Pregnancy rate, maternal performance, cow weight and body condition of Angus (A), Pinzgauer (P), Red Poll (R), and Simmental (S) sired females were evaluated. Pregnancy rates of A, R and P were similar, averaging 92 ± 2%, and exceeded the 74 ± 4% pregnancy rate of S. Dystocia occurred less frequently in A (13 ± 4%) and R (13 ± 5%) than in P (24 ± 4%) and S (23 ± 4%). Calves from A were lighter at birth (38.1 ± .7 kg) than calves from
 P (42.6 ± .7 kg) and S (41.6 ± .7 kg). Calves from R were lighter at birth (39.8 ± .9 kg) than calves from P but not different from calves with A or S. Calves from A grew less rapidly from birth to weaning (ADG = 932 ± 14 g/d) and were lighter at 200 d (WWT = 225 ± 3 kg) than calves from P and S (ADG = 968 ± 14 and 994 ± 14 g/d, and WWT = 236 ± 3 and 240 ± 3, kg respectively). Calves from R grew less rapidly from birth to weaning (938 ±17 g/d) and were lighter at weaning (228 ± 4 kg) than calves from S and were not different from calves with A or P. Red Poll females weighed less (470 ± 2 kg) and S weighed more (534 ± 2 kg) than A (502 ± 2 kg) and, P (502 ± 2 kg). Red Poll carried less condition than A, S, or P, with S intermediate to A and P. Of the
 original A-sired females 66±6% were pregnant to calve when 7-yr-old compared with 47 ± 6%, 54 ± 6% and 38 ± 6% of P, R, and S, respectively.
 

M. D MacNeil, W. L Reynolds, J. J Urick

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 288–291, 1994
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