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Jia R, Chen X, Zhu Z, Huang J, Yu F, Zhang L, Ogura A, Pan J. Improving ovulation in gilts using anti-inhibin serum treatment combined with fixed-time artificial insemination. Reprod Domest Anim 2020; 56:112-119. [PMID: 33152153 DOI: 10.1111/rda.13854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 10/31/2020] [Accepted: 11/03/2020] [Indexed: 11/28/2022]
Abstract
For successful batch farrowing, porcine oestrus and ovulation must be synchronized using fixed-time artificial insemination (FTAI). However, exogenous gonadotropins, which are currently used in FTAI, negatively affect gilt ovulation. Here, we aimed to improve sexually mature gilt superovulation efficiency using passive immunization against inhibin during FTAI. Altrenogest-treated gilts were challenged with 10 ml anti-inhibin serum (AIS group, n = 6), 1,000 IU pregnant mare serum gonadotropin (PMSG group, n = 6), or 10 ml goat serum (control group, n = 6). Gilts in the AIS and PMSG groups were inseminated according to the FTAI protocol, and gilts in the control group were inseminated during natural oestrus. When PMSG was replaced by AIS during FTAI of gilts, ovulation rate and embryos recovered were significantly greater in the AIS group as compared to the other two groups (p < .05). Especially the average number of 6-8-cell embryos in the AIS group was significantly higher than that in the PMSG group (p < .01). Moreover, the blastocyst number in the AIS group was significantly higher than that in the PMSG group and the control group (p < .05). But there was no significant difference in the blastocyst number between the PMSG group and the control group (p > .05). Besides, plasma levels of estradiol-β (E2) and progesterone (P4) were significantly greater in the AIS group as compared to the other two groups on Day 23 and D 27, respectively (p < .01). In summary, we devised an improved high-yield FTAI protocol for sexually mature gilts using AIS; this protocol had a greater superovulation efficiency than the FTAI using PMSG.
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Affiliation(s)
- Ruoxin Jia
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China.,Department of Reproduction, the Third of Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Xiaoyu Chen
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China
| | - Zhiwei Zhu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China.,Ningbo Kuangdai Livestock Husbandry Technology Co. Ltd., Ningbo, China
| | - Jing Huang
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China.,Ningbo Kuangdai Livestock Husbandry Technology Co. Ltd., Ningbo, China
| | - Fuxian Yu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China
| | - Liang Zhang
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China
| | - Atsuo Ogura
- RIKEN Bioresource Research Center, Tsukuba, Japan
| | - Jianzhi Pan
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, China.,Ningbo Kuangdai Livestock Husbandry Technology Co. Ltd., Ningbo, China
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