Iranian Journal of animal Science

Iranian Journal of animal Science

Effect of eCG, PGF2α and GnRH hormones on ewes' reproductive performance in breeding season

Document Type : Research Paper

Authors
Abolhassan Sadeghi Panah 1
Reza Masoudi 2
Hamid Reza Naeejian 3
Abbas Akbari-Sharif 4
1 Assistant Professor, Department of Animal Husbandry Management, Research Institute of Animal Science, Heydar-Abad, Karaj, Iran
2 Ph. D. Student, Department of Animal Science, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3 Former Graduate Student, Islamic Azad University, Science and Research Branch, Young Researchers Club and Elite, Tehran, Iran
4 Instructor, Breeding Sheep Station Zandi, Pishva, Varamin, Iran
10.22059/ijas.2015.55650
Abstract
The aim of this study was to determine the effects of eCG, PGF2α and GnRH hormone on improvement of reproduction performance of CIDR synchronized Zandi ewes in breeding season. 500 ewes with age of 2.5-4 years and same nutritional condition were selected for this study and received CIDR for 12 days. Then these ewes were assigned to five equal groups. First group received no hormone (control group). In the second group, ewes were injected 400 Iu of eCG at the time of CIDR removal. The ewes of third group received 400 IU of eCG and 1 ml PGF2α at the time of CIDR removal. The ewes of forth group received 400 IU of eCG at the time of CIDR removal and 1 ml GnRH in 14th day. The ewes of fifth group were received 400 IU of eCG and 1 ml PGF2α at the time of CIDR removal and 1 ml GnRH in 14th day. All ewes were inseminated 54 hours after CIDR removal. Results showed that heat rate was higher in hormone treated groups than control group (P<0.05), but the diffrences between treated groups were not significant. Groups receiving GuRHhad higher pregnancy rate, parturition rate and lambing rate than other groups (P<0.05). Pregnancy rate, parturition rate and lambing rate of eCG and PGF2α groups were higher than control group (P<0.05). In conclusion using of eCG injection at the time of CIDR removal and GnRH in the day of artificial insemination could improve reproductive efficiency in Zandi ewe in the breeding season.
Keywords
reproduction performance
Zandi ewe
eCG
PGF2α
GnRH
  1. Akif Cam, M. & Kuran, M. (2004). Effects of a single injection of hCG or GnRH agonist on day 12 post mating on fetal growth and reproductive performance of sheep. Animal Reproduction Science, 80, 81-90.
  2. Akoz, M., Ataman, M., Bulbul, M. & Dere, S. (2006). Induction of multiple births in Akkaraman cross-bred sheep synchronized with short duration and different doses of progesterone treatment combined with PMSG outside the breeding season. Bulltein of Veterinary Research Institute Pulway, 50, 97-100.
  3. Aral, F., Yavuzer, Ü. & Zonturlu, A.K. (2010). The effect of air pressure with cervical artificial insemination on the fertility of Awassi ewes synchronized with PGF2α. Kafkas University of Veterinary, 16, 37-41.
  4. Ashmawy, T. (2012). Effect of ovarian synchronization protocols, using GnRH and PGF2α, on ovarian response and reproductive traits of Rahmani ewes. Egypian Journal of Sheep and Goat Science, 7, 43-49.
  5. Ataman, M.B. & Aköz, M. (2006). GnRH-PGF2α and PGF2α-PGF2α synchronization in Akkaraman cross-bred sheep in the breeding season. Bulltein of Veterinary Research Institute Pulway, 50, 101-104.
  6. Evans, G and Maxwell, WMC (1987). Salmon`s artificial insemination of sheep and goats. Butterworths.
  7. Eppleston, J., Evans, G. & Roberts, E. (1991). Effect of time of PMSG and GnRH on the time of ovulation, LH secretion and reproductive performance after intrauterine insemination with frozen ram semen. Animal Reproduction Science, 26, 227-237.
  8. Fallah Rad, A.H. & Farzaneh, N. (2007). Effect of CIDR and different doses of PMSG on pregnancy and lambing rate out of breeding season in Baluchi ewes. Journal of Animal and Veterinary Advances, 6, 1167 - 1171.
  9. Godfrey, R., Collins, J., Hensley, E. & Wheaton, J. (1999). Estrus synchronization and artificial insemination of hair sheep ewes in the tropics. Theriogenology, 51, 985-997.
  10. Hackett, A.J., Robertson, H.A. & Wolynetz, M.S. (1981). Effects of PGF2α and PMSG on the reproductive performance of fluorogestone acetate-PMSG treated ewes. Journal of Animal Science, 53, 155 -159.
  11. Husein, M. & Haddad, S. (2006). A new approach to enhance reproductive performance in sheep using royal jelly in comparison with equine chorionic gonadotropin. Animal Reproduction Science, 93, 24-33.
  12. Karagiannidis, A., Varsakeli, S., Karatzas, G. & Brozos, C. (2001). Effect of time of artificial insemination on fertility of progestagen and PMSG treated indigenous Greek ewes, during non-breeding season. Small Ruminant Research, 39, 67-71.
  13. Kermani Moakhar, H., Kohram, H., Zareh Shahneh, A. & Saberifar, T. (2012). Ovarian response and pregnancy rate following different doses of eCG treatment in Chall ewes. Small Ruminant Research, 102, 63-67
  14. Langford, G.A. (1982). Influence of PMSG and Time of Aritificial Insemination on Fertility of Progestogen-Treated Sheep in Confinement. Journal of Animal Science, 54, 1205-1211.
  15. Mehmet, A., Bulbul, B. & Dere, S. (2007). Inducation of multiple births in Akkaraman cross-bred sheep synchronized with short duration and different doses of progesterone treatment combined with PMSG outside the breeding season. Bulltein of Veterinary Research Institute Pulway, 50, 97 - 100.
  16. Naqvi, S.M.K. & Gulyani, R. (1998). The effect of GnRH and FSH in conjucation with PMSG on the supeovulatory response in crossbred sheep in India. Tropical Animal Health Production, 30, 369 - 376.
  17. Turk, G., Gur, S., Sonmez, M., Bozkurt, T., Aksu, E.H. & Aksoy, H. (2008). Effect of exogenous GnRH at the time of artificial insemination on reproductive performance of Awassi ewes synchronized with progestagen-PMSG-PGF2alpha combination. Reproduction in Domestic Animal, 43, 308-313.
  18. Walker, S., Smith, D., Ancell, P. & Seamark, R. (1989). Time of ovulation in the south australian Merino ewe following synchronization of estrus. 2. Efficacy of GnRH treatment and its relevance to insemination programs utilizing frozen-thawed semen. Theriogenology, 31, 555-564.
  19. Zarkawi, M. (2001). Oestrous synchronisation and twinning rate of Syrian Awassi ewes treated with progestagen and PMSG during the breeding season. New Zealand Journal of Agricultur Research, 44, 159-163.
  20. Zonturlu, A., Aral, F., Ozyurtlu, N. & Yavuzer, U. (2008). Synchronization of estrus using FGA and CIDR intravaginal pessaries during the transition period in awassi ewes. Journal of Animal and Veterinary Advances, 7, 1093-1096.
  21. Zonturlu, A.K., Özyurtlu, N. & Kaçar, C. (2011). Effect of different doses PMSG on estrus synchronization and fertility in Awassi ewes synchronized with progesterone during the transition period. Kafkas University of Veterinary, 17.

 

Iranian Journal of animal Science
Volume 46, Issue 2 - Serial Number 2
Summer 2015
Pages 189-194

  • Receive Date 11 October 2014
  • Revise Date 02 February 2015
  • Accept Date 01 March 2015