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| ANDRADE, J. P. N.; GOMEZ-LÉON, V. E.; ANDRADE, F. S.; CARVALHO, B. P.; LACOUTH, K. L.; GARCIA, F. Z.; JACOB, J. C. F.; SALES, J. N. S.; WILTBANK, M. C.; MELLO, M. R. B.. |
| The aim was to develop a program for resynchronization of ovulation (ReBreed21) that allowed reinsemination of non-pregnant Bos indicus heifers every 21 d using timed AI (TAI) without the need for detection of estrus. The Rebreed21 program begins 12 d after previous TAI (Day 0) by inserting an intravaginal P4 implant (Day 12) that is removed 7 d later (Day 19) combined with treatment with 300 IU of eCG. On Day 21, early pregnancy diagnosis (Doppler PD) is performed based on CL vascularity. Nonpregnant (NP) heifers immediately received AI combined with 100 mg of GnRH. The program is replicated 12 d after second TAI to produce a breeding season (BS) of 42 d with 3 potential TAIs. Two ex periments were conducted as a proof of concept for this rapid rebreeding... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: ReBreed21; Ressincronização; Resynchronization; Razas zebú; Vaquilla; Cruce de animales; Métodos de mejoramiento genético; Inseminación artificial; Ovulación; Reprodução Animal; Gado Zebu; Bos Indicus; Gado Nelore; Novilho; Inseminação Artificial; Ovulação; Zebu breeds; Nellore; Heifers; Animal breeding; Breeding methods; Artificial insemination; Ovulation. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1124659 |
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