Comparison of the effects of two pre-synchronization protocols (G6G and PG-3-G) on some reproductive performance parameters in Holstein cows
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Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Amaç: Bu çalışmada postpartum 28-40 günler arasında uygulanan G6G ve PG3-G ön senkronizasyon protokollerinin Holstein ineklerde bazı üreme parametreleri üzerindeki etkilerinin belirlenmesi amaçlanmıştır. Gereç ve Yöntem: G6G grubundaki ineklere (n=35) 0. gün PGF2?, 2. gün GnRH, 8. gün GnRH, 15. gün PGF2?, ikinci PGF2? uygulamasından sonraki 56. saatte GnRH uygulaması yapıldı ve bunu takiben 16-18. saatte zamanlı suni tohumlama işlemi uygulandı. PG-3-G grubundaki ineklere (n=35) ise 0. gün PGF2?, 3. gün GnRH, 10. gün GnRH, 17. gün PGF2?, ikinci PGF2? uygulamasından sonraki 56. saatte GnRH uygulaması yapıldı ve bunu takiben 16-18. saatte zamanlı suni tohumlama işlemi uygulandı. Bulgular: G6G ve PG-3-G gruplarında arz oranı (%100 ve %100), ilk tohumlamada gebe kalma oranları (%42.9 ve %51.4), doğum ilk tohumlama aralığı (53.5 ve 54.0 gün), doğum gebe kalma aralığı (54.1 ve 53.7 gün), buzağılama aralığı (334.1 ve 333.7 gün) parametrelerinde gruplar arasında istatistiksel olarak farklılık bulunmadı. Protokol başlangıcında inekler siklik ve nonsiklik olmalarına göre değerlendirildiğinde ilk tohumlamada gebe kalma oranları nonsiklik ineklerde ve siklik ineklerde sırasıyla %64,7 ve %41,5 olarak tespit edildi. Yapılan istatistiksel analizde gruplar arasındaki farkın önemli olma eğiliminde olduğu görüldü (p=0,098). Öneri: Sonuç olarak postpartum erken dönemde başlatılan ön senkronizasyon protokolleri ile gönüllü bekleme süresini takip eden erken dönemde %100 arz oranı sağlanmıştır. Ön senkronizasyon protokolleri buzağılama aralığını 400 günden aşağı çekerek etkisini bariz şekilde ortaya koymuştur. Östrüs takibine gerek duyulmadan zaman ve iş gücünden tasarruf edilebileceği, nonsiklik ineklerde de uygun gebelik oranına ulaşılabileceği kanısına varılmıştır
Aim: The present study was aimed to determine effects of G6G and PG-3-G presynchronization protocols on some reproductive parameters in Holstein cows between postpartum 28-40 days. Materials and Methods: Cows in the G6G group (n=35) were treated with PGF2? on day (d) 0, GnRH on days 2 and 8, and PGF2? on day 15. The injection of last GnRH was applied 56 hours after the second PGF2? injection and then timed artifical insemination (TAI) was performed 16-18 hours later. Cows in the PG-3-G group (n=35) were treated with PGF2? on day 0, GnRH on day 3 and 10, and PGF2? on day 17. The injection of last GnRH and TAI were applied as they were done for G6G group. Results: There were no statistical differences between the G6G and PG-3-G groups in terms of submission rate (100% and 100%), the first-service pregnancy per artificial insemination (P/AI) (42.9% and 51.4%), calving to first insemination interval (53.5 and 54.0 d), calving to conception interval (54.1 and 53.7 d), calving interval (334.1 and 333.7 d) were determined. When the data analyzed according to the protocol at the beginning of cows to be "cyclic" and "noncyclic", P/AI were found to be 64.7% and 41.5%, respectively. The difference between the groups was tended to be significant (p=0.098). Conclusion: Start of presynchronization protocols in the early postpartum period, provides 100% SR after the voluntary waiting period. It is clearly shown that the presynchronization protocols reduces the calving interval less than 400 days. Time and labor cost could be saved as there would be no needs for oestrus detection and appropriate P/AI could also be achieved in non-cyclic cows.
Aim: The present study was aimed to determine effects of G6G and PG-3-G presynchronization protocols on some reproductive parameters in Holstein cows between postpartum 28-40 days. Materials and Methods: Cows in the G6G group (n=35) were treated with PGF2? on day (d) 0, GnRH on days 2 and 8, and PGF2? on day 15. The injection of last GnRH was applied 56 hours after the second PGF2? injection and then timed artifical insemination (TAI) was performed 16-18 hours later. Cows in the PG-3-G group (n=35) were treated with PGF2? on day 0, GnRH on day 3 and 10, and PGF2? on day 17. The injection of last GnRH and TAI were applied as they were done for G6G group. Results: There were no statistical differences between the G6G and PG-3-G groups in terms of submission rate (100% and 100%), the first-service pregnancy per artificial insemination (P/AI) (42.9% and 51.4%), calving to first insemination interval (53.5 and 54.0 d), calving to conception interval (54.1 and 53.7 d), calving interval (334.1 and 333.7 d) were determined. When the data analyzed according to the protocol at the beginning of cows to be "cyclic" and "noncyclic", P/AI were found to be 64.7% and 41.5%, respectively. The difference between the groups was tended to be significant (p=0.098). Conclusion: Start of presynchronization protocols in the early postpartum period, provides 100% SR after the voluntary waiting period. It is clearly shown that the presynchronization protocols reduces the calving interval less than 400 days. Time and labor cost could be saved as there would be no needs for oestrus detection and appropriate P/AI could also be achieved in non-cyclic cows.
Açıklama
Anahtar Kelimeler
Süt ineği, postpartum, ön senkronizasyon, G6G, PG-3-G, Dairy cow, postpartum, presynchronization
Kaynak
Eurasian Journal of Veterinary Sciences
WoS Q Değeri
Scopus Q Değeri
Cilt
36
Sayı
4
Künye
Dinç, D. A., Kutlu, M., (2020). Comparison of the effects of two pre-synchronization protocols (G6G and PG-3-G) on some reproductive performance parameters in Holstein cows. Eurasian Journal of Veterinary Sciences, 36 (4), 248-254. DOI: 10.15312/EurasianJVetSci.2020.305
