Paschal J C, Sanders J O, Kerr J L
Texas Agricultural Experiment Station, College Station 77843.
J Anim Sci. 1991 Jun;69(6):2395-402. doi: 10.2527/1991.6962395x.
Calving and weaning data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included calving and weaning records of F1 calves out of multiparous Hereford cows and sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. At calving, Angus-sired calves had shorter gestations and lower (more desirable) calving ease scores and were smaller than Bos indicus-sired calves. Among the Bos indicus crosses, Gir calves had the shortest gestations, lowest calving ease scores, lightest birth weights (P less than .05), and smallest cannon bone lengths and heart girths. Nellore calves had the longest gestations (P less than .05) and largest heart girths. Calves by Indu-Brazil sires had the highest calving ease scores, highest birth weights (P less than .05), and greatest cannon bone lengths (P less than .05). Gray Brahman- and Red Brahman-sired calves were similar and intermediate for all calving characters. At weaning, Angus-sired calves had gained slightly faster than the Gir crosses and weighed more but were shorter at the hip than Gir crosses. Gir calves gained the least preweaning, weighed the least, and were shortest at weaning of the Bos indicus crosses. The Nellore and Indu-Brazil crosses were intermediate in preweaning gain and weaning weight to the Gir and the Red and Gray Brahman but were tallest at weaning. Gray Brahman and Red Brahman calves gained the most and were heaviest at weaning but were not as tall as the Nellore and Indu-Brazil.
对由五个印度瘤牛品种和一个欧洲牛品种所生杂交犊牛的产犊和断奶数据进行了评估。数据包括多胎海福特母牛所生、由安格斯牛、灰色婆罗门牛、吉尔牛、印度 - 巴西牛、内洛尔牛和红色婆罗门牛公牛所育F1犊牛的产犊和断奶记录。产犊时，安格斯牛所生犊牛妊娠期较短，产犊难易度评分较低（更理想），且比印度瘤牛所生犊牛体型小。在印度瘤牛杂交品种中，吉尔牛犊牛妊娠期最短，产犊难易度评分最低，出生体重最轻（P小于0.05），管骨长度和胸围最小。内洛尔牛犊牛妊娠期最长（P小于0.05），胸围最大。印度 - 巴西牛公牛所生犊牛产犊难易度评分最高，出生体重最高（P小于0.05），管骨长度最长（P小于0.05）。灰色婆罗门牛和红色婆罗门牛所生犊牛在所有产犊性状方面相似，处于中间水平。断奶时，安格斯牛所生犊牛生长速度略快于吉尔牛杂交后代，体重更重，但臀部高度低于吉尔牛杂交后代。吉尔牛犊牛断奶前生长最慢，体重最轻，在印度瘤牛杂交品种中断奶时最矮。内洛尔牛和印度 - 巴西牛杂交后代断奶前生长速度和断奶体重处于吉尔牛与红色和灰色婆罗门牛之间，但断奶时最高。灰色婆罗门牛和红色婆罗门牛犊牛断奶前生长最快，断奶时最重，但不如内洛尔牛和印度 - 巴西牛高。
