Bu öğeden alıntı yapmak, öğeye bağlanmak için bu tanımlayıcıyı kullanınız: http://hdl.handle.net/11452/28386
Başlık: Comparison of responses to Ovsynch between Holstein-Friesian and Swedish Red cows
Yazarlar: Çelik, Yakup
Okut, Hayrettin
Wiltbank, Milo Charles
Uludağ Üniversitesi/Veterinerlik Fakültesi/Klinik Bilimler Bölümü.
0000-0003-2817-3221
Keskin, Abdülkadir
Yılmazbaş, Gülnaz Mecitoğlu
Gümen, Ahmet
Karakaya, Ebru Bilen
AAH-1406-2021
AAG-4440-2019
AAH-3831-2021
24473229800
36457964000
6602393069
36457784500
Anahtar kelimeler: Ovsynch
Breed
Reproduction
Agriculture
Food science & technology
Friesia
Yayın Tarihi: 2010
Yayıncı: Elsevier
Atıf: Keskin, A. vd. (2010). "Comparison of responses to Ovsynch between Holstein-Friesian and Swedish Red cows". Journal of Dairy Science, 93(Suplement 1), 219-219.
Özet: The Ovsynch protocol was designed to synchronize ovulation, thereby allowing timed artificial insemination (TAI) of all cows without detection of estrus. However, the effectiveness of Ovsynch in different breeds of dairy cows has not been previously compared. The aim of this study was to compare the response to Ovsynch in cycling lactating Holstein-Friesian (HF) and Swedish Red (SR) dairy cows. A total of 495 cyclic cows (n=347 HF, n=148 SR) were housed together and treated with Ovsynch (GnRH - 7 d - PGF2α - 56h - GnRH - 16 to 18h - TAI). Ovulatory responses, synchronization rate, maximal follicle size at the time of AI, and percentage of pregnant cows per AI (P/AI at 31 and 62 d after AI) were compared between breeds. Ultrasonography was performed during Ovsynch at first GnRH, PGF2α, at time of AI, and 7 d after AI. Ovulatory response and synchronization rate were similar in HF versus SR cows (60.2 vs. 62.2%; 88.4 vs. 88.5%, respectively). Cows that ovulated to the first GnRH of Ovsynch had smaller follicle size at AI (15.9±0.1 vs. 16.4±0.2mm). Maximal follicle size at AI was greater for HF (16.4±2.2mm) than SR (15.5±2.3mm) cows. The P/AI was greater for SR than HF cows at the 62-d pregnancy diagnosis (56.1 vs. 46.1%). In addition, pregnancy loss between 31 and 62 d of pregnancy was greater in HF (10.1%) than SR (3.5%) cows. Fertility was less in HF cows during the hot season (57.7 in cold vs. 38.1% in the hot season), whereas such a decrease was not observed in SR (60.0 in cold vs. 53.5% in the hot season) cows. Thus, although the GnRH treatments of Ovsynch were equally effective in SR and HF cows, pregnancy outcomes (P/AI at d 62 and pregnancy survival) were greater in SR than HF cows, and P/AI in SR cows was not compromised during the hot season as was found for HF cows.
URI: https://doi.org/10.3168/jds.2010-3579
https://www.sciencedirect.com/science/article/pii/S0022030211001469
http://hdl.handle.net/11452/28386
ISSN: 0022-0302
Koleksiyonlarda Görünür:Scopus
TrDizin
Web of Science

Bu öğenin dosyaları:
Dosya Açıklama BoyutBiçim 
Keskin_vd_2010.pdf110.58 kBAdobe PDFKüçük resim
Göster/Aç


Bu öğe kapsamında lisanslı Creative Commons License Creative Commons