Beef Cattle Production Efficiency Improvement Through Different Breeding Program in Khao Kor and Bueng Sam Phan District, Phetchabun Province
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Abstract
This study aimed to improve beef cattle production by implementing a seasonal breeding program that utilizes estrus synchronization with different hormones to enhance the conception rate and artificial insemination (AI) in Khao Kho and Bueng Sam Phan Districts. A total of 90 beef cattle were randomly selected from the two districts (45 from each district). These cattle were assigned to three treatments with 15 cattle per group. All selected cattle underwent fertility examinations and had a body condition score (BCS) of at least 2.50. The experimental design was a randomized complete block design (RCBD) with two districts as blocks. The experimental groups included group 1: natural estrus (control), group 2: induced estrus by hormone and scheduled the duration for artificial insemination (GnRH + PG) and group 3: induced estrus by hormone plus CIDR® and determine of the duration of artificial insemination (GnRH + PG + CIDR®). The results indicated that the treatments did not significantly affect reproductive efficiency, first-service conception, and the artificial insemination index in both districts (P> 0.05). However, the estrus synchronization programs did lead to a slightly higher first-service conception rate. Further research is recommended to develop estrus synchronization programs that can benefit beef cattle farmers.
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กรมปศุสัตว์. 2549. การดูแลสุขภาพโคเนื้อ. สำนักงานพัฒนาการปศุสัตว์และถ่ายทอดเทคโนโลยี
กรมปศุสัตว์. กรุงเทพฯ.
ชุติมา วงศ์สังวาลย์, วิสูตร ไมตรีจิตต์ และ สุธิษา มาเจริญ. 2567. เวลาในการถอดแท่ง progesterone ในโปรแกรมผสมเทียมแบบกำหนดเวลาต่อสมรรถภาพทางการสืบพันธุ์ในโคสาวพันธุ์กำแพงแสน.
วารสารแก่นเกษตร. 2024(ฉบับพิเศษ 2): 639-646.
Edmonson, A., I. Lean, L. Weaver, T. Farver and G. Webster. 1989. A body condition scoring chart for Holstein dairy cows. Journal of dairy science. 72: 68-78.
Ferre, L.B., M.N. Cervino, J. Jaeschke, M. Itterman, J. McLean, A. Aragon, A. Fernandez, M. Villa, N. Formia, M. Jaureguiberry, R. Rearte, M.E. Kjelland, M.G. Colazo, J.M. Thomas and R.L. Sota. 2025. Evaluation of GnRH- versus estradiol-based protocols for ovulation synchronization in postpartum Bos taurus grazing beef cows submitted to fixed-time artificial insemination. Theriogenology. 233(2025): 1–7.
Kaim, M., A. Bloch, D. Wolfenson, R. Braw-Tal, M. Rosenberg, H. Voet and Y. Folman. 2021. Effects of GnRH Administered to Cows at the Onset of Estrus on Timing of Ovulation, Endocrine Responses, and Conception. Journal of dairy science. 88(6): 2012-2021.
Kasimanickam, R., J. Hall, J. Currin and W. Whittier. 2008. Sire effect on the pregnancy outcome in beef cows synchronized with progesterone based Ovsynch and CO-Synch protocols. Animal Reproduction Science. 104(1): 1-8.
Melo, D.B., W.M. Jr. Coelho, T. Marques, C.S. Salman, I.M. Macedo, T. Castro, M.C.G. Menezes, H.F. Monteiro, R.F. Cotterman, A.J. Conley and F.S. Lima. 2024. Effect of 200 μg of gonadorelin hydrochloride at the first GnRH of a CO-Synch program on ovulation rate and pregnancies per artificial insemination in Holstein heifers. Journal of Dairy Science. 107(8): 6268-6277.
Moriel, P., P. Lancaster, G.C. Lamb, J.M.B. Vendramini and J.D. Arthington. 2017. Effects of post-weaning growth rate and puberty induction protocol on reproductive performance of Bos indicus-influenced beef heifers. Journal of Animal Science. 95(8): 3523–3531.
Novakovic, B., J. Nikitovic, M. Antic and M. Mergedus. 2020. Insemination Index and Fertilization Success in Holstein’s Cattle Race After Retention of The Placenta. Journal of Agricultural, Food and Environmental Sciences. 74(1): 46-55.
Ratzburg, K., K. Jorgensen-Muga, J. Murugesan, J. Kastelic, V. Kasimanickam and R. Kasimanickam. 2020. Presynchronization with CIDR, with or without GnRH, prior to COSynch in beef heifers. Theriogenology. 146(2020): 80-87
Rich, J.J.J., E.J. Northrop, E.L. Larimore and G.A. Perry. 2018. Influence of GnRH supplementation at CIDR removal on estrus expression and interval to estrus in beef cattle. Theriogenology. 119(2018): 76-79
Thomas, J.M., J.W.C. Locke, B.E. Bishop, J.M. Abel, M.R. Ellersieck, J.V. Yelich, S.E. Poock, M.F. Smith and D.J. Patterson. 2017. Evaluation of the 14-d CIDR-PG and 9-d CIDR-PG protocols for synchronization of estrus in Bos indicus-influenced and Bos taurus beef heifers. Theriogenology. 92: 190-196.
