GnRH and prostaglandin- based synchronization protocols as alternatives to progestogen- based treatments in sheep

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cg.authorship.typesCGIAR and developing country instituteen_US
cg.contributor.affiliationInternational Center for Agricultural Research in the Dry Areasen_US
cg.contributor.affiliationEcole Nationale de Medecine Veterinaire, Tunisiaen_US
cg.contributor.affiliationInstitut National de la Recherche Agronomique de Tunisieen_US
cg.contributor.affiliationDebre Berhan Agricultural Research Center, Ethiopiaen_US
cg.contributor.crpLivestock and Fishen_US
cg.creator.identifierMourad Rekik: 0000-0001-7455-2017en_US
cg.creator.identifierAynalem: 0000-0001-5914-0487en_US
cg.creator.identifierBarbara Rischkowsky: 0000-0002-0035-471Xen_US
cg.howPublishedFormally Publisheden_US
cg.identifier.doihttps://doi.org/10.1111/rda.12761en_US
cg.isijournalISI Journalen_US
cg.issn1439-0531en_US
cg.issue6en_US
cg.journalReproduction in Domestic Animalsen_US
cg.subject.ilriGENETICSen_US
cg.subject.ilriANIMAL BREEDINGen_US
cg.subject.ilriLIVESTOCKen_US
cg.subject.ilriSHEEPen_US
cg.subject.ilriSMALL RUMINANTSen_US
cg.volume51en_US
dc.contributor.authorRekik, Mouraden_US
dc.contributor.authorHaile, Aynalemen_US
dc.contributor.authorAbebe, A.en_US
dc.contributor.authorMuluneh, D.en_US
dc.contributor.authorGoshme, Shenkuteen_US
dc.contributor.authorBen Salem, I.en_US
dc.contributor.authorHilali, M. El-Dineen_US
dc.contributor.authorLassoued, N.en_US
dc.contributor.authorChanyalew, Y.en_US
dc.contributor.authorRischkowsky, Barbara A.en_US
dc.date.accessioned2016-09-02T09:52:34Zen_US
dc.date.available2016-09-02T09:52:34Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/76910en_US
dc.titleGnRH and prostaglandin- based synchronization protocols as alternatives to progestogen- based treatments in sheepen_US
dcterms.abstractThe study investigated, for cycling sheep, synchronizing protocols simultaneously to the standard “P” protocol using progestogens priming with intravaginal devices and gonadotropin. In November 2014, 90 adult Menz ewes were assigned to either the “P” protocol, “PGF” treatment where oestrus and ovulation were synchronized using two injections of prostaglandin 11 days apart or a “GnRH” treatment where the ewes had their oestrus and ovulation synchronized with GnRH (day 0)–prostaglandin (day 6)–GnRH (day 9) sequence. The ewes were naturally mated at the induced oestrus and the following 36 days. Plasma progesterone revealed that 92% of the ewes were ovulating before synchronization and all, except one, ovulated in response to the applied treatments. All “P” ewes exhibited oestrus during the 96‐hr period after the end of the treatments in comparison with only 79.3% and 73.3% for “PGF” and “GnRH” ewes, respectively (p < .05). Onset and duration of oestrus were affected by the hormonal treatment (p < .05); “GnRH” ewes showed oestrus earliest and had the shortest oestrous duration. Lambing rate from mating at the induced oestrus was lower for “P” than for “PGF” ewes (55.6% and 79.3%, respectively; p < .05). The same trait was also lower for “P” than for “PGF” and “GnRH” ewes (70.4%, 89.7% and 86.7%, respectively; p < .05) following the 36‐day mating period. Prostaglandin and GnRH analogue‐based protocols are promising alternatives for both controlled natural mating and fixed insemination of Menz sheep after the rainy season when most animals are spontaneously cycling.en_US
dcterms.accessRightsLimited Accessen_US
dcterms.audienceScientistsen_US
dcterms.available2016-08-26en_US
dcterms.bibliographicCitationRekik, M., Haile, A., Abebe, A., Muluneh, D., Goshme, S., Ben Salem, I., Hilali, M. El-Dine., Lassoued, N., Chanyalew, Y. and Rischkowsky, B. 2016. GnRH and prostaglandin-based synchronization protocols as alternatives to progestogen-based treatments in sheep. Reproduction in Domestic Animals. 51(6): 924-929.en_US
dcterms.extentp. 924-929en_US
dcterms.issued2016-12en_US
dcterms.languageenen_US
dcterms.licenseCopyrighted; all rights reserveden_US
dcterms.publisherWileyen_US
dcterms.subjectprostaglandinsen_US
dcterms.subjectsynchronizationen_US
dcterms.subjectsheepen_US
dcterms.typeJournal Articleen_US

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