Induction of fertile estrus in prepuberal gilts by treatment with a combination of pregnant mare's serum gonadotropin and human chorionic gonadotropin.
Induction of fertile estrus in prepuberal gilts by treatment with a combination of pregnant mare's serum gonadotropin and human chorionic gonadotropin.
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通过联合使用怀孕马血清促性腺激素和人绒毛膜促性腺激素治疗，诱导青春期前后备母猪发情。
DOI：
10.2527/jas1989.6751148x
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发表时间：
1989
影响因子：
3.3
通讯作者：
M. Brauer
中科院分区：
文献类型：
--
作者：
J. Britt;B. N. Day;S. Webel;M. Brauer
在北卡罗来纳州、伊利诺伊州和密苏里州进行了10项试验，涉及678头假定的青春期前后备母猪（5.5 - 7.5月龄），以评价联合给予400 IU妊娠母马血清促性腺激素和200 IU人绒毛膜促性腺激素（P. G. 600）。被认为是青春期前的后备母猪接受了P.G. 600或在从肥育设施移动到用于繁殖的围栏的当天不处理（对照）。每天用成年公猪进行发情检测，连续28 d;发情期的母猪自然交配。用PG治疗。600增加了7 d内发情率（57.5vs40.9%）和28 d内发情率（72.9vs59.5%），平均发情间隔从10.4d缩短到7.5d（P <0.05）。产仔率（78.5 +/- 3.1%）、活产（8.6 +/- .2）或死产（.26 +/- .06）猪数和断奶猪数（8.0 +/- .2）不受给药影响。每个农场体重超过中位数的后备母猪发情时间更早，发情时检测到的数量更多，但重后备母猪和轻后备母猪之间没有其他生殖性状差异。总的来说，结果表明，P.G. 600对诱导初情期前母猪的可育性发情有一定作用。
Ten trials involving 678 presumed prepuberal gilts (5.5 to 7.5 mo old) were conducted in North Carolina, Illinois and Missouri to evaluate the reproductive performance of gilts given a combination of 400 IU of pregnant mare's serum gonadotropin and 200 IU of human chorionic gonadotropin (P. G. 600). Gilts that were presumed to be prepuberal received P. G. 600 or no treatment (control) on the day of movement from finishing facilities to pens for breeding. Detection of estrus, with the aid of mature boars, was conducted daily for 28 d; gilts in estrus were mated naturally. Treatment with P. G. 600 increased the percentage in estrus within 7 (57.5 vs 40.9%) or 28 d (72.9 vs 59.5%); average interval to estrus was reduced (P less than .05) from 10.4 to 7.5 d. Farrowing rate (78.5 +/- 3.1%), number of pigs born alive (8.6 +/- .2) or dead (.26 +/- .06) and number of pigs weaned (8.0 +/- .2) were unaffected by treatment. Gilts that were heavier than the median for each farm were in heat sooner and more were detected in heat, but no other reproductive traits differed between heavy and light gilts. Overall, the results reveal that P. G. 600 was useful for induction of fertile estrus in prepuberal gilts.