Comparison of fixed- time artificial insemination protocol for improving reproductive performance of crossbred beef cows
Keywords:
Fixed- time artificial insemination, reproductive performance, crossbred beef cowsAbstract
The objective of this study was to compare fixed-time artificial insemination protocol for improving reproductive performance of crossbred beef cows. Crossbred beef cows (n=40) were randomly assigned to receive 7-day Co-Synch + CIDR® and 9-day Co-Synch + CIDR® protocol. The results showed that the estrus response within 66 h were not different between the group (P > 0.05). However, diameter of the largest follicle at FTAI in 9-day Co-Synch + CIDR® group was significantly higher (14.6 vs. 11.4 mm; P < 0.05) than 7-day Co-Synch + CIDR® group. Ovulation rate and conception rate of crossbred beef cows were not different between the groups (P > 0.05). However, ovulation rate (75.0 vs. 60.0%) and conception rate (70.0 vs. 60.0%) in 9-day Co-Synch + CIDR® group tended greater than 7-day Co-Synch + CIDR®. In conclusion, cows synchronized with the 9-day Co-Synch + CIDR® protocol had greater diameter of the largest follicle at FTAI than those that received the 7-day Co-Synch + CIDR®, but did not affect conception rate.
References
Bo, G.A., Baruselli, P.S., & Martinez, M.F. (2003). Pattern and manipulation of follicular development in Bos indicus cattle. Animal Reproduction Science, 78, 307–326. https://doi.org/10.1016/S0378-4320(03)00097-6
Bridges, G.A., Helser, L.A., Grum, D.E., Mussard, M.L., Gasser, C.L., & Day, M.L. (2008). Decreasing the interval between GnRH and PGF2α from 7 to 5 days and lengthening proestrus increases timed AI pregnancy rates in beef cows. Theriogenology, 69, 843–851. https://doi.org/10.1016/j.theriogenology.2007.12.011
Bridges, G.A., Ahola, J.K., Brauner, C., Cruppe, L.H., Currin, J.C., Day, M.L., Gunn, P.J., Jaeger, J.R., Lake, S.L., Lamb, G.C., Marquezini, G.H.L., Peel, R.K., Radunz, A.E., Stevenson, J.S., & Whittier, W.D. (2012). Determination of the appropriate delivery of prostaglandin F2α in the five-day CO-Synch + controlled intravaginal drug release protocol in suckled beef cows. Journal of Animal Science, 90(13), 4814-22. http://dx.doi.org/10.2527/jas.2011-4880
Chawut, T. (2022). Optimization of conception rate of beef cows with fix time artificial insemination estrus synchronization by modified Co-synch. Prawarun Agriculture Journal, 19(2), 109-113. https://doi.nrct.go.th/admin/doc/doc_630605.pdf
Colazo, M.G., Gordon, M.B., Rajamahendran, R., Mapletoft, R.J., & Ambrose, D.J. (2009). Pregnancy rates to timed artificial insemination in dairy cows treated with gonadotrophin-releasing hormone or porcine luteinizing hormone. Theriogenology, 72, 262-270. https://doi.org/10.1016/j.theriogenology.2009.02.017
Cerri, R.L., Rutigliano, H.M., Chebel, R.C., & Santos, J.E.P. (2009). Period of dominance of the ovulatory follicle influences embryo quality in lactating dairy cows. Reproduction, 137, 813–823. https://doi.org/10.1530/REP-08-0242
Day, M.L., Mussard, M.L., Bridges, G.A., & Burke, C.R. (2010). Controlling the dominant follicle in beef cattle to improve estrous synchronization and early embryonic development. Society of Reproduction and Fertility supplement, 67(1), 405-419. https://pubmed.ncbi.nlm.nih.gov/21755687/
De Rensis, F., & Scaramuzzi, R.J. (2003). Heat stress and seasonal effects on reproduction in the dairy cow - a review. Theriogenology, 60(6), 1139-1151. https://doi.org/10.1016/S0093-691X(03)00126-2
Perry, G.A., Smith, M.F., Roberts, A.J., MacNeil, M.D., & Geary, T.W. (2007). Relationship between size of the ovulatory follicle and pregnancy success in beef heifers. Journal of Animal Science, 85, 684–689. https://doi.org/10.2527/jas.2006-519
Praveen Raj, M., Venkata Naidu, G., Srinivas, M., Raghunath, M., & Ananda Rao, K. (2018). Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis). Indian Journal of Animal Research, 52(6), 834-838. https://arccjournals.com/journal/indian-journal-of-animal-research/B-3302
Pursley, J.R., Silcox, R.W., & Wiltbank, M.C. (1998). Effect of time of artificial insemination on pregnancy rates, calving rates, pregnancy loss, and gender ratio after synchronization of ovulation in lactating dairy cows. Journal of Dairy Science, 81, 2139–2144. https://doi.org/10.3168/jds.S0022-0302(98)75790-X
Sajapitak, S., Yawongsa, A., & Arunvipas P. (2015). Estrus synchronization and fixed-time artificial insemination using combined progesterone and prostaglandin F2 alpha together with hCG, or GnRH in cross-bred Indu-Brazil beef cows. Journal of Kasetsart Veterinarians, 25(3), 115-122. https://kukr.lib.ku.ac.th/kukr_es/index.php?/BKN_VET/search_detail/result/371240
Santos, J.E.P., Narciso, C.D., Rivera, F., Thatcher, W.W., & Chebel, R.C. (2010). Effect of reducing the period of follicle dominance in a timed artificial insemination protocol on reproduction of dairy cows. Journal of Dairy Science, 93(7), 2976– 2988. https://doi.org/10.3168/jds.2009-2870
Whittier, W.D., Currin, J.F., Schramm, H., Holland, S., & Kasimanickam, R.K. (2013). Fertility in Angus cross beef cows following 5-day CO-Synch + CIDR or 7-day CO-Synch + CIDR estrus synchronization and timed artificial insemination. Theriogenology, 80(9), 963-9. http://dx.doi.org/10.1016/j.theriogenology.2013.07.019
Wongsangwan, C., Maitreejet, W., & Majarune, S. (2024). Time implant removal of progesterone device in fixed-time artificial insemination on reproductive performance of Kamphaeng Saen beef heifers. Khon Kaen Agriculture Journal SUPPL, 2, 639-646. https://ag2.kku.ac.th/kaj/PDF.cfm?filename=0010-08-KAJA- FP-PP(final)-prove.pdf&id=5073&keeptrack=9
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