牛临时断奶与马绒毛膜促性腺激素在阴道内孕酮固定时间人工授精后的方案比较

Q4 Veterinary

Archives of Veterinary Science Pub Date : 2021-06-29 DOI:10.5380/AVS.V26I2.75408

André Luiz Bastos de Souza, M. S. Segui, L. E. Kozicki, V. Pedrosa, Rafaela Talini, R. R. Weiss, Natalia Santana Siqueira Lara

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引用次数: 0

摘要

本研究的目的是比较犊牛临时断奶(TW)和马绒毛膜促性腺激素(eCG)两种方案的生殖效率，以及定时人工授精(TAI)方案的发情和排卵同步。试验将534头产牛分为3组:方案组(TW8G)第8天临时断奶;N = 225);第9天临时断奶组(TW9G;n = 139)和马绒毛膜促性腺激素组(eCGG, n = 170)。TW8G在第0天(d0)接受含黄体酮的阴道内装置(P4;0.558g) +雌二醇苯甲酸酯(EB;2毫克,im)。在第8天，用P4 + PGF (0.075mg, im) +雌二醇(EC 0.5 mg, im) +去除小牛48小时。10日，进行了TAI，幼崽回到了它们的母亲身边。TW9G接受与TW8G相同的治疗方案，除了P4装置的移除(发生在9日)和d11，进行TAI，小牛回到他们的母亲身边。eCGG的治疗方案与TW8G相同，但在第8天接受心电图(300IU, im)，第9天接受苯甲酸雌二醇治疗，第10天接受TAI治疗。妊娠诊断更改为在第45天完成。对未怀孕的母牛(TAI后)在观察发情(常规AI)的情况下再次人工授精。传统人工智能中剩下的空牛和公牛一起待了45天。TAI后的PR分别为47.1 (TW8G)、40.2 (TW9G)和51.7% (GeCG)，而常规AI后的PR为19.3%;31.3%和26.8%。繁殖季末，TW8G、TW9G和eCGG的PR分别为95.1、90.6和92.3%。结果表明，不同应用方案在定时人工授精的生殖效率上无显著差异;在肉牛的繁殖期可实施TW或eCG。

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COMPARAÇÃO ENTRE PROTOCOLOS COM DESMAME TEMPORÁRIO VERSUS GONADOTROFINA CORIÔNICA EQUINA APÓS TRATAMENTO COM PROGESTERONA INTRAVAGINAL VISANDO A INSEMINAÇÃO ARTIFICIAL EM TEMPO FIXO EM VACAS BOS TAURUS INDICUS

The aim of the study was to compare the reproductive efficiency of two protocols with temporary weaning (TW) of calves and one using equine chorionic gonadotropin (eCG), the synchronization of estrus and ovulation in timed artificial insemination (TAI) protocol. A total of 534 multiparous cows were distributed into three groups: temporary weaning on day 8 of the protocol group (TW8G; n = 225); temporary weaning on day 9 group (TW9G; n = 139) and equine chorionic gonadotropin group (eCGG, n = 170). TW8G received on day zero (d0) an intravaginal device with progesterone (P4; 0.558g) + estradiol benzoate (EB; 2mg, im). On d8, the device was removed with P4 + PGF (0.075mg, im) + estradiol cypionate (EC 0.5 mg, im) + removal of the calf for 48 hours. On d10, TAI was performed, and the calves returned to their mothers. The TW9G was subjected to the same protocol as the TW8G, except for the removal of the device with the P4, which occurred on the 9th, and on the d11, TAI was performed, and the calves returned to their mothers. eCGG was subjected to the same protocol as TW8G, except that on d8 it received eCG (300IU, im), on d9 estradiol benzoate and TAI on d10. The pregnancy diagnosis was made change for done at d45. The non-pregnant cows (post TAI) were re-inseminated under the observation for estrus observation (conventional AI). The remaining empty cows from conventional AI remained with the bull for another 45 days. PR after TAI was 47.1 (TW8G), 40.2 (TW9G) and 51.7% (GeCG), while PR after conventional AI was 19.3%; 31.3% and 26.8%. PR at the end of the breeding season resulted in 95.1, 90.6, and 92.3% respectively for TW8G, TW9G and eCGG. It was concluded that there was no difference in reproductive efficiency in the timed artificial insemination between the applied protocols; the use of TW or eCG can be implemented in the breeding season of beef cows.

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来源期刊

Archives of Veterinary Science Veterinary-Veterinary (all)

CiteScore

0.30

自引率

0.00%

发文量

审稿时长

90 weeks

期刊介绍： O periódico ARCHIVES OF VETERINARY SCIENCE (AVS) é publicado trimestralmente, sob orientação do seu Corpo Editorial, com a finalidade de divulgar artigos completos e de revisão relacionados à ciência animal sobre os temas: clínica, cirurgia e patologia veterinária; sanidade animal e medicina veterinária preventiva; nutrição e alimentação animal; sistemas de produção animal e meio ambiente; reprodução e melhoramento genético animal; tecnologia de alimentos; economia e sociologia rural e métodos de investigação científica. A publicação dos artigos científicos dependerá da observância das normas editoriais e dos pareceres dos consultores “ad hoc”.