Characterization of Biological Types of Cattle I. Dystocia and Preweaning Growth

Environmental and Genetic Effects on Preweaning Performance of Calves From First-Cross Cows. Ii. Growth Traits

“…The paired comparisons of terminal sire breeds provided by these data gave rankings of Chi > C (2.5Vo), Chi > S (4.27o) and Chi > L (11.47o) for birth weight (P < 0.0001) and Chi : C : S > L by 67o (P < 0.0001) for all postweaning growth traits measured (Table 4). For the C, S and L terminal sires the results agree with those reported by Smith et al (1976 Notter et al (1978) and Gaskins and Anderson (1980 …”

Individual and Maternal Additive and Heterotic Effects on 205-Day Weight in Beef Cattle

“…The individual direct effect of the Limousin was less (P<.01) than that of the Simmental, but similar to those of the Charolais and the Chianina. Smith et al (1976) found that Limousinsired calves weighed significantly less at 200 d than Charolais-and Simmental-sired calves, which were similar. The individual additive effect of the Gelbvieh was significantly less than those of the previously mentioned breeds and was greater (P<.01) than those of the Tarentaise, Shorthorn, Polled Hereford and Angus breeds, which were similar.…”

“…The Polled Hereford maternal additive effect was less (P<.01) than that of the Shorthorn and Hereford. Numerous reports have documented the maternal superiority of the Angus over the Hereford breed of dam (Gregory et al, 1965(Gregory et al, , 1978a(Gregory et al, , 1979Smith et al, 1976). Notter et al (1978) observed no significant differences in weaning weights of calves out of Hereford-Charolais and Angus-Charolais cross cows.…”

The effect of Charolais and Hereford sires and straightbred and crossbred dams on pre-weaning growth of calves

“…The incidence of dystocia in Charolais sired calves due to high BW has been well recognized by a number of authors (Laster et al, 1973;Smith et al, 1976). Pahnish et al (1969) reported that the Charolais as breed of sire produced heavier calves at birth than the Charolais as breed of dam.…”