Spitzer J C, Hopkins F M, Webster H W, Kirkpatrick F D, Hill H S
Department of Animal Science, College of Agricultural Sciences, Clemson University, SC 29634.
J Am Vet Med Assoc. 1988 Nov 1;193(9):1075-9.
Yearling beef bulls were subjected to a breeding soundness examination (BSE) at completion of performance testing programs at 4 locations over 5 years. Of 862 bulls, 80.1% were classified as satisfactory potential breeders, 7.3% as questionable potential breeders, and 12.7% as unsatisfactory potential breeders. Year (P less than 0.01), location (P less than 0.01), and breed (P less than 0.01) affected the percentage of bulls classified as satisfactory; age of the bulls did not affect this percentage. Adjusted mean scrotal circumference (SC) measurements were 31, 33.2, and 34.8 cm for bulls classified as unsatisfactory, questionable, and satisfactory (P less than 0.01), respectively. Of 109 bulls classified as unsatisfactory, 2.8% were so classified because of poor semen quality alone; 41.3% had no ejaculate in 4 separate electroejaculation attempts. Other abnormalities in these 109 bulls included reproductive tract infections (22%), persistent penile frenulum (16.5%), testicular abnormalities (8.3%), fibropapilloma (1.8%), hernia (1.8%), aplastic epididymis (1.8%), penile abnormalities (1.8%), pendulous sheath (0.9%), and eye abnormalities (0.9%). Age had a significant effect on SC in bulls at 3 locations and on percentage of normal cells, primary abnormalities, and secondary abnormalities as well as BSE score at 1 location. Percentage of primary and secondary abnormalities as well as SC were different across years at 2 locations, and percentage of normal and motile cells as well as BSE score were different across years at 1 location. Breed effects were significant for SC, percentage of primary abnormalities, and BSE score at 3 locations and for percentage of normal and motile cells at 1 location.
在5年时间里，对4个地点完成性能测试计划的一岁肉牛公牛进行了繁殖健全性检查（BSE）。在862头公牛中，80.1%被归类为合格的潜在种公牛，7.3%为有疑问的潜在种公牛，12.7%为不合格的潜在种公牛。年份（P<0.01）、地点（P<0.01）和品种（P<0.01）影响被归类为合格的公牛百分比；公牛年龄不影响该百分比。被归类为不合格、有疑问和合格的公牛的调整后平均阴囊周长（SC）测量值分别为31、33.2和34.8厘米（P<0.01）。在109头被归类为不合格的公牛中，2.8%仅因精液质量差而被如此归类；41.3%在4次单独的电刺激采精尝试中没有射精。这109头公牛的其他异常包括生殖道感染（22%）、持续性阴茎系带（16.5%）、睾丸异常（8.3%）、纤维乳头瘤（1.8%）、疝气（1.8%）、附睾发育不全（1.8%）、阴茎异常（1.8%）、阴囊下垂（0.9%）和眼部异常（0.9%）。年龄对3个地点的公牛的SC以及1个地点的正常细胞百分比、原发性异常、继发性异常和BSE评分有显著影响。2个地点的原发性和继发性异常百分比以及SC在不同年份有所不同，1个地点的正常和活动细胞百分比以及BSE评分在不同年份有所不同。品种效应在3个地点对SC、原发性异常百分比和BSE评分以及1个地点对正常和活动细胞百分比具有显著意义。
