Holstein ırkı ineklerde target breeding ve presynch-ovsynch senkronizasyon yöntemlerinin postpartum ilk tohumlamada gebe kalma oranı üzerine etkisi
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Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Veterinerlik Fakültesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Amaç: Sunulan çalışmada Holstein ırkı ineklerde target breeding ve presynchovsynch senkronizasyon protokollerinin ilk tohumlamadaki gebe kalma oranı üzerine etkilerinin belirlenmesi amaçlanmıştır. Gereç ve Yöntem: Çalışmada postpartum 30-35. günler arasında olan ve 2,5-6 yaşlı 160 sağlıklı Holstein ırkı inek kullanıldı. İneklere ilk olarak rektal ve ultrasonografik muayene yapıldı ve genital sisteminde herhangi bir sorun tespit edilmeyen hayvanlar çalışmaya dahil edildi. Çalışmada hayvanlar 3 gruba ayrıldı. Birinci Grup (Target breeding, n=60) ineklere 14 gün arayla 3 kez PGF2? enjeksiyonu yapıldı. Üçüncü PGF2? enjeksiyonundan sonra 72. saate kadar östrus gösteren hayvanlar tohumlandı. Östrus göstermeyen hayvanlar ise 80. saatte sabit zamanlı olarak tohumlandı. İkinci Grup (Presynch-Ovsynch, n=50) ineklere ise 14 gün arayla iki kez PGF2? enjeksiyonu yapıldı ve ikinci PGF2? enjeksiyonundan 12 gün sonra Ovsynch protokolüne başlandı. Üçüncü Grup (Kontrol, n=50) ineklere ise herhangi bir uygulama yapılmadı. Postpartum ilk tohumlama günü ve gebe kalma oranları kayıt altına alındı. Tohumlama sonrası ineklerin gebelik muayeneleri 30. günde ultrasonografi ile yapıldı. Bulgular: Target breeding, presynch-ovsynch ve kontrol grubunda gebe kalma oranları sırasıyla; %36,66 (22/60), %32,0 (16/50) ve %24,0 (12/60) olarak belirlendi (p>0.05). Target breeding grubunda son PGF2? enjeksiyonundan sonra 72 saat içerisinde 38 (%63,33; 38/60) inekte östrus gözlemlendi. Östrus gösterdiği tespit edilip tohumlanan ve östrus göstermeden sabit zamanlı tohumlanan ineklerin gebelik oranları sırasıyla %42,10 (16/38) ve %27,27 (6/22) bulundu. Öneri: Target breeding ve presynch-ovsynch gruplarında ilk tohumlama sonrası gebe kalma oranları istatistiksel olarak artmamasına rağmen bu gruplarda kontrol grubuna göre daha yüksek gebe kalma oranları elde edilmiştir. Sonuç olarak bu senkronizasyon protokollerinin ilk servis periyodunda olumlu etkisinin olabileceği ancak daha fazla hayvan sayısı ile yeni çalışmaların yapılması gerektiği düşünülmektedir
Aim: The aim of this study was to determine the effect of target breeding and presynch-ovsynch synchronization protocols on the conception rate in the first insemination in Holstein breed cows. Materials and Methods: Study material was consisted of 160 healthy Holstein cows within 30-35 days postpartum and 2.5-6 year of age. The cows were first examined by rectally and ultrasonographically and animals without any problems in the genital system were included in the study. The animals were divided into 3 groups. Group 1 (Target breeding, n = 60) cows were injected with PGF2? three times at 14 days intervals. After the third injection of PGF2?, animals showing estrus up to 72 hours were inseminated. Animals that did not show estrus were inseminated in fixed time at 80th hour. In the second group (Presynch-Ovsynch, n = 50) cows were injected with PGF2? twice 14 days apart and Ovsynch protocol was started 12 days following the second PGF2? injection. Cows in the third group (Control, n = 50) did not receive any treatment. Postpartum first insemination day and conception rates were recorded. Pregnancy examinations of cows were performed by ultrasonography on the 30th day following insemination. Results: Pregnancy rates in target breeding, presynch-ovsynch and control groups were as 36.66% (22/60), 32.0% (16/50) and 24.0% (12/60), respectively (p>0.05). In the target breeding group, estrus was observed in 38 (63.33%; 38/60) cows within 72 hours following the last injection of PGF2?. Pregnancy rates were 42.10% (16/38) and 27.27% (6/22) in inseminated cows by showing estrus and fixed-time inseminated cows without showing estrus, respectively. Conclusion: Although the conception rates after the first insemination did not increase statistically in the target breeding and presynch-ovsynch groups, higher conception rates were obtained in these groups compared to the control group. In conclusion, it is thought that these synchronization protocols may have a positive effect in the first service period however; further studies with more animals are needed.
Aim: The aim of this study was to determine the effect of target breeding and presynch-ovsynch synchronization protocols on the conception rate in the first insemination in Holstein breed cows. Materials and Methods: Study material was consisted of 160 healthy Holstein cows within 30-35 days postpartum and 2.5-6 year of age. The cows were first examined by rectally and ultrasonographically and animals without any problems in the genital system were included in the study. The animals were divided into 3 groups. Group 1 (Target breeding, n = 60) cows were injected with PGF2? three times at 14 days intervals. After the third injection of PGF2?, animals showing estrus up to 72 hours were inseminated. Animals that did not show estrus were inseminated in fixed time at 80th hour. In the second group (Presynch-Ovsynch, n = 50) cows were injected with PGF2? twice 14 days apart and Ovsynch protocol was started 12 days following the second PGF2? injection. Cows in the third group (Control, n = 50) did not receive any treatment. Postpartum first insemination day and conception rates were recorded. Pregnancy examinations of cows were performed by ultrasonography on the 30th day following insemination. Results: Pregnancy rates in target breeding, presynch-ovsynch and control groups were as 36.66% (22/60), 32.0% (16/50) and 24.0% (12/60), respectively (p>0.05). In the target breeding group, estrus was observed in 38 (63.33%; 38/60) cows within 72 hours following the last injection of PGF2?. Pregnancy rates were 42.10% (16/38) and 27.27% (6/22) in inseminated cows by showing estrus and fixed-time inseminated cows without showing estrus, respectively. Conclusion: Although the conception rates after the first insemination did not increase statistically in the target breeding and presynch-ovsynch groups, higher conception rates were obtained in these groups compared to the control group. In conclusion, it is thought that these synchronization protocols may have a positive effect in the first service period however; further studies with more animals are needed.
Açıklama
Anahtar Kelimeler
İlk servis periyodu, senkronizasyon, gebelik oranı, inek, First service period, synchronization, pregnancy rate, cow
Kaynak
Eurasian Journal of Veterinary Sciences
WoS Q Değeri
Scopus Q Değeri
Cilt
36
Sayı
1
Künye
Alkan, K. K., Alkan, H., (2020). Holstein ırkı ineklerde target breeding ve presynch-ovsynch senkronizasyon yöntemlerinin postpartum ilk tohumlamada gebe kalma oranı üzerine etkisi. Eurasian Journal of Veterinary Sciences, 36 (1), 36-41. DOI: 10.15312/EurasianJVetSci.2020.257
