Pregnancy rate to FTAI in Braford heifers submitted to J-Synch protocol
DOI:
https://doi.org/10.26605/medvet-v14n4-3589Palabras clave:
estrus, synchronization protocols, GnRH, tail-paint.Resumen
The objective of the present work was to evaluate the effect of J-Synch protocol on pregnancy rate (PR) of heifers artificially inseminated after detected estrus (DEAI) or at fixed-time (FTAI). Two hundred ninety-three Braford heifers were used. On day 0, all animals received 2.0 mg of estradiol benzoate administered intramuscularly (IM) and an intravaginal progesterone-releasing device (DIB, 0.5 g). Heifers were assigned to the following group: 1) J-Synch: on day 6, DIB devices were removed and 500 µg of d-Cloprostenol sodium (d-CS) was administered IM and paint was applied on tail base (tail-paint). On day 9 (60 h after DIB removal), heifers with ? 40% of the tail-paint rubbed off were inseminated. Those not showing estrus by 72 h after DIB removal received 100 µg of GnRH at that time and were FTAI. 2) Conventional: on day 7, DIB devices were removed, and 500 µg of d-CS and 0.5 mg of estradiol cypionate were administered IM and tail-paint. Forty-eight hours after DIB removal, heifers with the tail-paint rubbed off were DEAI. Those not showing estrus by 54 h after DIB removal were FTAI. Pregnancy rate was diagnosed by ultrasonography 30 days after FTAI in all heifers and did not differ between protocols (44.28% and 42.48%, P = 0.673). In both protocols, higher PR was observed in DEAI heifers (P = 0.047). In conclusion, the use of the J-Synch protocol generated similar PR to the Conventional protocol, allowing its use with the same efficiency. Furthermore, the DEAI generated better PR than the FTAI, regardless of the protocol used.Descargas
Citas
Bó, G.A.; de la Mata, J.J.; Baruselli, P.S.; Menchaca, A. Alternative programs for synchronizing and resynchronizing ovulation in beef cattle. Theriogenology, 86: 388-396, 2016.
Bó, G.A.; Huguenine, E.; de la Mata, J.J.; Núñez-Olivera, R.; Baruselli, P.S.; Menchaca, A. Programs for fixed-time artificial insemination in South American beef cattle. Animal Reproduction, 15: 952-962, 2018.
Bonotto, A.L.M.; Mion, B.; Bonotto, R.M.; Farias, C.O.; Rosa, F.S.; Schneider, A. Evaluation of the J-Synch protocol associated with eCG and estrous detection in beef heifers. Animal Reproduction, 14(3): 670, 2017.
Bridges, G.A.; Mussard, M.L.; Burke, C.R.; Day, M.L. Influence of the length of proestrus on fertility and endocrine function in female cattle. Animal Reproduction Science, 117: 208-215, 2010.
Cedeño, A.; Maingón, R.; Cedeño, J.; Guadalupe, C.; Morales, L.; Pinargote, L.; Figueroa, V.; Bó, G. Follicular and luteal characteristics and pregnancy rates in Bos indicus suckled cows treated with two oestradiol/progesterone-based protocols with a prolonged pro-oestrus. Reproduction, Fertility and Development, 32: 212-213, 2019.
Dadarwal, D.; Mapletoft, R.J.; Adams, G.P.; Pfeifer, L.F.M.; Creelman, C.; Singh, J. Effect of progesterone concentration and duration of proestrus on fertility in beef cattle after fixed-time artificial insemination. Theriogenology, 79: 859-866, 2013.
de la Mata, J.J.; Bó, G.A. Estrus synchronization and ovulation using protocols with estradiol benzoate and GnRH and reduced periods of insertion of a progesterone releasing device in beef heifers. Taurus, 55: 17-23, 2012.
de la Mata, J.J.; Ré, M.; Bó, G.A. Combination of oestrus detection and fixed-time artificial insemination in beef heifers following a shortened oestradiol-based protocol that provides for a lengthened proestrus. Reproduction, Fertility and Development, 27: 96-97, 2015.
de la Mata, J.J.; Núñez-Olivera, R.; Cuadro, F.; Bosolasco, D.; De Brun, V.; Meikle, A.; Bó, G.A.; Menchaca, A. Effects of extending the length of pro-oestrus in an oestradiol- and progesterone-based oestrus synchronisation program on ovarian function, uterine environment and pregnancy establishment in beef heifers. Reproduction, Fertility and Development, 30: 1541-1552, 2018.
Delgado, P.A.M.; Cuéllar, N.R.; Sánchez, C.M.G.; Rojas, E.C.C. Dinamica folicular en la vida reproductiva de la hembra bovina. Veterinária e Zootecnia, 5: 88-89, 2016.
Di Rienzo, J.A.; Casanoves, F.; Balzarini, M.G.; Gonzalez, L.; Tablada, M.; Robledo, C.W. InfoStat versión 2017. Argentina: Grupo InfoStat, FCA, Universidad Nacional de Córdoba. Available at: http://www.infostat.com.ar>. Accessed on: 26 August 2020.
Dominicis, O.; Madero, S.; Catalano, R.; Cabodevila, J.; Callejas, S. Efecto del tratamiento J-Synch sobre el porcentaje de preñez en vaquillonas para cría inseminadas a tiempo fijo. Revista Veterinaria, 30(2): 31-35, 2019.
Edwards, S.A.A.; Boe-Hansen, G.B.; Satake, N.; Chandra, K.; McGowan, M.R. A field investigation of a modified intravaginal progesterone releasing device and oestradiol benzoate based ovulation synchronisation protocol designed for fixed-time artificial insemination of Brahman heifers. Animal Reproduction Science, 160: 105-111, 2015.
Kastelic, J.P.; Curran, S.; Pierson, R.A.; Ginther, O.J. Ultrasonic evaluation of the bovine conceptus. Theriogenology, 29: 39-54, 1988.
Motta, J.C.; Colli, M.H.A.; Penteado, L.; Bayeux, B.M.; Mingoti, R.; Bo, G.; Lugo, L.; Rezende, R.G.; Baruselli, P.S. Pregnancy rate to FTAI in Nelore and crossbreed heifers submitted to J-Synch protocol (6 days). Animal Reproduction, 13 (3): 401, 2016.
Macmillan, K.; Gobikrushanth, M.; Sanz, A.; Bignell, D.; Boender, G.; Macrae, L.; Mapletoft, R.J.; Colazo, M.G. Comparison of the effects of two shortened timed-AI protocols on pregnancy per AI in beef cattle. Theriogenology, 142: 85-91, 2020.
Menchaca, A.; Nuñez-Olivera, R.; Cuadro, F.; Bo, G. Pregnancy rates in beef heifers synchronized with a shortened oestradiol-based treatment that provides for a prolonged proestrus. Reproduction, Fertility and Development, 27(1): 96, 2014.
Mion, B.; Bonotto, R.M.; Farias, C.O.; Rosa, F.S.; Pradiee, J.; Rovani, M.T.; Pegoraro, L.M.C.; Bonotto, A.L.M.; Pfeifer, L.F.M.; Schneider, A. J-Synch protocol associated with estrus detection in beef heifers and non-lactating cows. Medicina Veterinária, 13: 269-274, 2019.
Núñez-Olivera, R.; Cuadro, F.; Bosolasco, D.; de Brun, V.; de la Mata, J.; Brochado, C., Meikle, A.; Bó, G.A.; Menchaca, A. Effect of equine chorionic gonadotropin (eCG) administration and proestrus length on ovarian response, uterine functionality and pregnancy rate in beef heifers inseminated at a fixed-time. Theriogenology, 151: 16-27, 2020.
Reineri, P.S.; Piccardi, M.; Arroquy, J.; Fumagalli, A.; Coria, M.S.; Hernández, O.; Bó, G.; Palma, G.A. Hormones and monensin use to improve pregnancy rates in beef cows. Animal Reproduction, 15(1): 56-63, 2018.
Richards, M.W.; Spitzer, J.C.; Warner, M.B. Effect of varying levels of postpartum nutrition and body condition at calving on subsequent reproductive performance in beef cattle. Journal of Animal Science, 62(2): 300-306, 1986.
Rivera, H.; Lopes, H.; Fricke, P.M. Use of intravaginal progesterone-releasing inserts in a synchronization protocol before timed AI and for synchronization return to estrus in holstein heifers. Journal of Dairy Science, 88: 957-968, 2005.
Sá Filho, M.F.; Santos, J.E.; Ferreira, R.M.; Sales, J.N.; Baruselli, P.S. Importance of estrus on pregnancy per insemination in suckled Bos indicus cows submitted to estradiol/progesterone-based timed insemination protocols. Theriogenology, 76: 455-463, 2011.
Descargas
Publicado
Cómo citar
Número
Sección
Licencia
- A Revista de Medicina Veterinária permite que o autor retenha os direitos de publicação sem restrições, utilizando para tal a licença Creative Commons CC BY-NC-SA 4.0.
- De acordo com os termos seguintes:
- Atribuição — Você deve dar o crédito apropriado, prover um link para a licença e indicar se mudanças foram feitas. Você deve fazê-lo em qualquer circunstância razoável, mas de nenhuma maneira que sugira que o licenciante apoia você ou o seu uso.
- NãoComercial — Você não pode usar o material para fins comerciais.
- CompartilhaIgual — Se você remixar, transformar, ou criar a partir do material, tem de distribuir as suas contribuições sob a mesma licença que o original.
- Sem restrições adicionais — Você não pode aplicar termos jurídicos ou medidas de caráter tecnológico que restrinjam legalmente outros de fazerem algo que a licença permita.
