Effects of PMSG Doses on Reproductive Performance of Kurdi Ewes Artificially Inseminated during Breeding Season
الموضوعات :
M. Nosrati
1
(Department of Animal Science, Faculty of Agriculture, Ferdowsi Universityof Mashhad, Mashhad, Iran)
M. Tahmorespoor
2
(Department of Animal Science, Faculty of Agriculture, Ferdowsi Universityof Mashhad, Mashhad, Iran)
M. Vatandoost
3
(Department of Animal Science, Faculty of Agriculture, PayameNoorUniversityof Bojnord, Iran)
M. Behgar
4
(Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, Karaj, Iran)
الکلمات المفتاحية: reproductive performance, estrus synchronization, Kurdi sheep, PMSG dosage,
ملخص المقالة :
This experiment was conducted to determine the reproductive performance of Kurdi ewes which were artificially inseminated (AI). In total 240 Kurdi ewes, weighing 49.5±2.5 kg were used in the trail. The ewes were allocated randomly to one of four groups (n=60/in each group). For synchronizing, controlled internal drug release (CIDR) was placed in the vagina of all individuals for 14 days. After removing the CIDR, pregnant mare's serum gonadotropin (PMSG) hormone was intramuscularly injected at the dosages of 300, 400, 500 and 600 IU in four groups of ewes. Cervical artificial insemination was performed after two days following CIDR withdrawal and hormone administration. The conception rates in groups I, II, III and IV were found as 63.7, 66.1, 65.8 and 67.9%, respectively. The mean litter size was significantly higher in groups II, III and IV (1.30, 1.34 and 1.46) than group I (1.11). The fecundity rate was lowest in group I (65.6%). Administration of 600 I.U PMSG resulted in the highest (58.9%) multiple births (P<0.05). These results suggest that 600 I.U. PMSG was more effective in increasing multiple births in the Kurdi ewes in breeding season.
Akoz M., Bulbul M., Ataman B. and Dere S. (2006). Induction of multiple births in Akkaraman cross-breed synchronized with short duration and different doses of progesterone treatment combined with PMSG outside the breeding season. Bull. Vet. Pulawy. 50, 97-100.
Ataman M.B., Akoz M. and Akman O. (2006). Induction of synchronized oestrus in Akkaraman cross-bred ewes during breeding and anestrus seasons: the use of short-term and long-term progesterone treatments. Rev. Med. Vet. 50, 257-260.
Avendano-Reyes L., Alvarez-Valenzuela F.D., Molina-Ramirez L., Rangel-Santos R., Correa-Calderon A., Rodriguez-Garcia J., Cruz-Villegas M., Robinson P.H. and Famula T.R. (2007). Reproduction performance of Pelibuey ewes in response to estrus synchronization and artificial insemination in Northwestern Mexico. J. Anim. Vet. Adv. 6, 807-812.
Boscos C.M., Samartzi F.C., Dellis S., Rogge A., Stefanakis A. and Krambovitis E. (2002). Use progestagen-gonadotrophin treatment in estrus synchronization of sheep. Theriogenology. 58, 1261-1272.
Dogan I.Z., Nur H., Gunay H., Sagirkaya M., Soylu K. and Sonmez C. (2005). Estrous synchronization during the natural breeding season in Anatolian black dose. J. vet. Med. Czech.50, 33-38.
DoganI., and Nur Z. (2006). Different estrous induction methods during the non-breeding season in Kivircik ewes. J. vet. Med. Czech.51, 133-138.
Evans A.C.O. (2003). Ovarian follicle growth and consequences for fertility in sheep. J. Anim. Vet. Adv. 78, 289-306.
Fallah Rad A.H. and Farzaneh N. (2007). Effect of CIDR and different dose of PMSG on pregnancy and lambing rate out of breeding season in Baluchi ewes. J. Anim. Vet. Adv. 6, 1167-1171.
Hashemi M., Safdarian M. and Kafi M. (2006). Estrous response to synchronization of estrus using different progesterone treatments outside the natural breeding season in ewes. Small. Rumin. Res. 65, 279-283.
Herman H.A. and Madden F.W. (1963). The artificial insemination of dairy and beef cattle: A handbook and laboratory manual. 9th Ed. Lucas Brothers, Columbia, Missouri.
Ince D. and Karaca O. (2009). Effects of oestrus synchronization and various doses of PMSG administration in Chios×Kivircik (F1) sheep on reproductive performances. J. Anim. Vet. Adv. 8, 1948-1952.
Karagiannidis A., Varsakeli S., Karatazas G. and Brozos C. (2001). Effect of the time of artificial insemination on fertility of progestagens and PMSG treated indigenous Greek ewes, during non-breeding season. Small. Rumin. Res. 39, 67-71.
KinghtsM., Baptiste Q.S., DixonA.B., Pate J.I., Marsh D.J., Insheep E.K. and Lewis P.E. (2003). Effects of a dosage of FSH, vehicle and time of treatment on ovulation rate and prolificacy in ewes during the anestrous season. Small. Rumin. Res. 50, 1-9.
Koyuncu M., Yerlikaya H. and Altincekic S.O. (2008). Effect of injection with dexamethasone and progestagens-PMSG on reproduction and rearing of lambs in semi-intensive condition. J. Biol. Sci. 11, 680-682.
Lamrani F., Benyounes A.,Sulon J.,Khaldi G., Rekik R., Bouraoui B.,Beckers J.F. and Tahar A. (2008). Effects of repeated use of PMSG on reproductive performances of the ouled djellal ewes. J. Anim. Vet. Adv. 2, 22-30.
Mazlum Z. (1971). Ticks of domestic animals in Iran: Geographic distribution, host relation, and seasonal activity. J. Vet.Facu. Uni. Theriol.27, 1-32.
Nassiry M.R., Eftekhar Shahrodi F., Tahmoorespur M. and Javadmanesh A. (2007). Genetic variability and population structure in Beta-lactoglobulin calpastatin and calpain loci in Iranain Kourdi sheep. J. Biol. Sci. 10, 1062-1067.
Özbey O. and Tatli P. (2001). İvesi koyunlarda flushing ve sinkronizasyon uygulamalamm döl verimi üzerine etkisi. UüVeteriner Fakültesi Dergisi. 20, 109-116.
Romano J.E. (1996). Comparison of fluorgestone and medroxyprogesterone intravaginal pessaries for estrus synchronization in dairy goats. Small. Rumin. Res. 22, 219-233.
Salehi R., Kohram H., Towhidi A., Kermani M.H. and Honarvar M. (2010). Follicular development and ovulation rate following different superovulatory treatments in Chall ewes. Accepted 31 May 2010, in press in Small Rum. Res.
SAS. (2004). User's Guide: Statistics. Version 9. Cary, NC, USA.
Scherf B. (2000). World Watch List for Domestic Animal Diversity. 3th Ed. Food and Agriculture Organization of the United Nations, Rome.
Simonetti L., Ramos G. and Gardon J.C. (2002). Effect of estrous synchronization and artificial insemination on reproductive performance of Merino sheep. Braz. J. Vet. Res. Anim. Sci. 39, 143-146.
Timurkan H. and Yildiz H. (2005). Synchronization of oestrus in Hamedani ewes: the use of different PMSG dose. Bull. Vet. Pulawy. 49, 311-314.
Ustuner B., GunayU., NurU.and UstunerU.(2007). Effects of long and short-term progestagens treatment combined with PMSG on oestrus synchronization and fertility in Awassi ewes during the breeding season. J. Acta vet. Brno.76, 391-397.
Wildeus S. (1999). Current concepts in synchronization of estrus: sheep and goats. J. Anim. Sci. 77, 1-14.
YavuzerU.(2005). The possibility of the twice-yearly lambing of Awassi sheep ewes without using hormones in an organic animal production system. Turk. J. Vet. Anim. Sci. 29, 27-30.
Yildiz S., Uzun M., Kaya M., Ucar O. and Genesiz O. (2004). Effects of rams and luteal or follicular phase ewes on preovulatory LH surge characteristics in ewes. Turk. J. Vet. Anim. Sci.28, 669-673.
Zeleke M., Greyling J.P.C., Schwalbach L.M.J., Muller T. and Erasmus J.A. (2005). Effects of PMSG dose on oestrous synchronization and fertility in Dorper ewes during transition period. Small. Rumin. Res. 56, 47-53.
