DUYGU BAKİ ACAR, MUHAMMED KÜRŞAD BİRDANE, Erhan ÖZENÇ, DENİZ YENİ, İSMET DOĞAN

Effectiveness of different progesterone analogues and GnRH on reproductive parameters in nulliparous Saanen goats at the end of the transition period

Çalışmada, geçiş döneminin sonundaki nullipar Saanen keçilerine uygulanan farklı östrus senkronizasyon protokollerinin reprodüktif parametreler üzerine etkilerinin karşılaştırılması amaçlandı. Çalışmada 71 adet nullipar Saanen keçisi kullanıldı ve keçiler rastgele 4 gruba ayrıldı: norgestomet implant + GnRH (Imp-G), norgestomet implant (Imp), FGA sünger + GnRH (Spo-G) ve FGA sünger (Spo). Progesteron tedavileri 11 gün süreyle uygulandı. Progesteron tedavilerinin son günü tüm keçilere 360 IU eCG ve 125 μg PGF2α yapıldı. Tedavilerin sonunda tüm keçiler fertil tekeler ile çiftleştirildi. Tedavi grupları arasında reprodüktif parametreler açısından istatistiksel bir farkın olmadığı belirlendi (P > 0.05). Tüm tedaviler değerlendirildiğinde keçilerin 29.2±0.36 saat içinde östrus gösterdiği saptandı. Sonuç olarak, yerel çevre şartlarında yetiştirilen ve geçiş sezonunun sonunda bulunan 7-9 aylık nullipar Saanen keçilerinde norgestomet implant ve FGA süngerin eCG ve PGF2α ile birlikte kullanılmasının östrus oranı, östrus başlangıcı, fekundite, prolifikasi ve fertilite oranları bakımından etkili olduğu; GnRH kullanımının ise fertilite parametrelerinde artış sağlamadığı belirlendi.

Geçiş döneminin sonundaki nullipar Saanen keçilerinde farklı progesteron analogları ve GnRH uygulamalarının reprodüktif parametreler üzerine etkinliği

The objective of this study was to compare the efficacy of different estrus synchronization protocols on reproductive parameters in nulliparous Saanen goats at the end of the transition period. In this experiment, 71 nulliparous Saanen does were used and divided into four treatment groups as norgestomet implant plus GnRH (Imp-G), norgestomet implant (Imp), FGA sponge plus GnRH (Spo-G), and FGA sponge (Spo). The progestagen treatments were administered for 11 days. At progestagen withdrawal, all does were injected with 360 IU of eCG and 125 μg of PGF2α. At the end of the treatments, all the does were joined with fertile bucks. There were no significant differences (P>0.05) in reproductive parameters among the treatments groups. Does were in estrus within 29.2±0.36 h for all the treatments combined. It was concluded that, the use of norgestomet implants and FGA sponges in combination with eCG and PGF2α were effective for estrus response, onset of estrus, fecundity, prolificacy, and fertility in nulliparous Saanen does at an age of 7-9 months under local conditions at the end of the transition period also GnRH was found to be ineffective in increasing the reproductive parameters.

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