Urick J J, MacNeil M D, Reynolds W L
ARS, Fort Keogh Livest and Range Res. Lab., U.S. Department of Agriculture, Miles City, MT 59301.
J Anim Sci. 1991 Feb;69(2):490-7. doi: 10.2527/1991.692490x.
Postweaning growth, feed consumption and carcass characteristics of 259 individually fed F1 Angus-, Red Poll-, Pinzgauer-, Simmental- and Tarentaise-sired steers from Hereford dams were compared. Average daily gain to 382 d of age for Simmental-sired steers exceeded (P less than .05) the ADG for Red Poll, Angus and Pinzgauer, which were not different. Tarentaise-sired steers were intermediate in growth rate. Simmental-sired steers required less (P less than .05) feed per kilogram of gain than Red Poll- and Angus-sired steers to reach either 382 d of age or 400 kg. Feed conversion (FC) by Simmental, Pinzgauer and Tarentaise-sired steers did not differ (P greater than .05), nor did FC by Red Poll- and Angus-sired steers to reach 382 d or 400 kg. Angus-sired steers required less ME per kilogram of gain to reach 12.7 mm of carcass backfat than did Red Poll-, Pinzgauer- or Tarentaise-sired steers, which were similar. Simmental-sired steers were intermediate in feed conversion to 12.7-mm fat depth and did not differ from the other breed groups. Rankings of breed groups for traits indicative of lean tissue growth were similar to rankings for live animal growth traits. At age- and weight-constant endpoints, Angus-sired steers had more (P less than .05) fat cover and marbling than did steers sired by the other breeds. At these endpoints, Red Poll-sired steers also had more (P less than .05) fat cover than did Pinzgauer-, Simmental- and Tarentaise-sired steers, which were similar.
比较了259头由赫里福德母牛所生、单独饲养的F1代安格斯、红波尔、平茨高尔、西门塔尔和塔朗泰斯公牛断奶后的生长情况、采食量和胴体特征。西门塔尔公牛到382日龄的平均日增重超过（P＜0.05）红波尔、安格斯和平茨高尔公牛，后三者之间无差异。塔朗泰斯公牛的生长速度居中。西门塔尔公牛达到382日龄或400千克体重时，每千克增重所需的饲料量比红波尔和安格斯公牛少（P＜0.05）。西门塔尔、平茨高尔和塔朗泰斯公牛的饲料转化率（FC）无差异（P＞0.05），红波尔和安格斯公牛达到382日龄或400千克体重时的饲料转化率也无差异。安格斯公牛达到12.7毫米胴体背膘厚度时，每千克增重所需的代谢能比红波尔、平茨高尔或塔朗泰斯公牛少，后三者之间相似。西门塔尔公牛在达到12.7毫米脂肪深度时的饲料转化率居中，与其他品种组无差异。在表明瘦肉组织生长的性状方面，品种组的排名与活体生长性状的排名相似。在年龄和体重恒定的终点时，安格斯公牛的脂肪覆盖和大理石花纹比其他品种的公牛多（P＜0.05）。在这些终点时，红波尔公牛的脂肪覆盖也比平茨高尔、西门塔尔和塔朗泰斯公牛多（P＜0.05），后三者之间相似。
