Effect of growth and carcass traits on likelihood of early pregnancy in Nellore heifers raised at intensive nutritional plan
Resumo
This study evaluated the influence of the quantitative traits measured by real-time ultrasound (adjusted longissimus muscle area [AdjLMA], adjusted rump fat thickness [AdjRFT], and adjusted marbling [AdjMAR]) as well as age at first breeding [AFB] and adjusted weight [AdjWeight], on the probability of occurrence of early pregnancy (EP) in 55 Nellore heifers, and also performed an economic analysis. All calves received supplementation in creep-feeding (ad libitum), and at weaning (average age= 210 ± 30 days; average weight= 241 ± 33 kg) until first breeding by artificial insemination (May to November) all heifers were managed in the same group (two paddocks of 25 ha each evenly covered with Urochloa Marandu Grass) and received protein-energy supplementation (1% of average BW per animal/day). The quantitative variables were collected immediately after timed artificial insemination (average age= 392 ± 27 days; average weight= 431.90 kg), and the pregnancy diagnosis was completed at 30 days following insemination. For economic analysis, two systems were compared (age at first breeding at 13 and 24 months). The greater adjusted weight on the first breeding increased the probability of occurrence of early pregnancy, while the greater adjusted longissimus muscle area reduced. In addition, intensive meat production systems provide greater economic return throughout cow-calf operation.
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Referências
Association of Official Analytical Chemists [AOAC]. (1990). Official methods of analysis (15th ed.). Washington, DC: AOAC International.
Caetano, S. L., Savegnago, R. P., Boligon, A. A., Ramos, S. B., Chud, T. C. S., Lôbo, R. B., & Munari, D. P. (2013). Estimates of genetic parameters for carcass grow thand reproductive traits in Nellore cattle. Livestock Science, 155(1), 1-7. DOI: https://doi.org/10.1016/j.livsci.2013.04.004
Cardoso, R. C., Alves, B. R. C., Prezotto, L. D., Thorson, J. F., Tedeschi, L. O., Keisler, D. H., & Williams, G. L. (2014). Use of a stair-step compensatory gain nutritional regimen to program the onset of puberty in beef heifers. Journal of Animal Science, 92(7), 2942-2949. DOI: https://doi.org/10.2527/jas.2014-7713
Chiaia, H. L. J., Lemos, M. V. A., VenturinI, G. C., Aboujaoude, C., Berton, M. P., Feitosa, F. B., ... Baldi, F. (2015). Genotype × environment interaction for age at first calving, scrotal circumference, and yearling weight in Nellore cattle using reaction norms in multitrait random regression models. Journal of Animal Science, 93(4), 1503-1510. DOI: https://doi.org/10.2527/jas.2014-8217
Cunningham, M. J., Clifton, D. K., & Steiner, R. A. (1999). Leptin's actions on the reproductive axis: perspectives and mechanisms. Biology of Reproduction, 60(2), 216-222. DOI: https://doi.org/10.1095/biolreprod60.2.216
Day, M. L., & Nogueira, G. P. (2013). Management of age at puberty in beef heifers to optimize efficiency of beef production. Animal Frontiers, 3(4), 6-11. DOI: https://doi.org/10.2527/af.2013-0027
Endecott, R. L., Funston, R. N., Mulliniks, J. T., & Roberts, A. J. (2013). Joint Alpharma-Beef Species Symposium: implications of beef heifer development systems and lifetime productivity. Journal of Animal Science, 91(3), 1329-1335. DOI: https://doi.org/10.2527/jas.2012-5704
Ferraz, M. V. C., Polizel, D. M., Miszura, A. A., Oliveira, G. B., Bertoloni, A. V., Sartori, R., ... Pires, A. V. (2017). Genetics is the essential factor for the precocious puberty in Nellore heifers. Journal of Animal Science, 95(4), 153-154. DOI: https://doi.org/10.2527/asasann.2017.310
Foldager, J., & Sejrsen, K. (1987). Mammary gland development and milk production in dairy cows in relation to feeding and hormone manipulation during rearing. In A. Neimann-Sørensen, Research in cattle production: danish status and perspectives (p. 102-116). Frederiksberg, DK : Landhusholdningsselskabets Forlag.
Freitas, A. R., Souza, J. F., & Moreira, A. (2011). Predição da precocidade sexual em bovinos da raça Nelore por meio de componentes principais. Revista de Ciências Agrárias, 54(2), 153-158. DOI: https://doi.org/10.4322/rca.2012.009
Freund, R. J., & Littell, R. C. (2000). SAS® system for regression. Cary, NC: SAS Institute Inc.
Hansen, M., Lund, M. S., Pedersen, J., & Christensen, L. G. (2004). Genetic parameters for stillbirth in Danish Holstein cows using a Bayesian threshold model. Journal of Dairy Science, 87(3), 706-716.
Ladeira, M. M., Schoonmaker, J. P., Swanson, K. C., Duckett, S. K., Gionbelli, M. P., Rodrigues, L. M., & Teixeira, P. D. (2018). Nutrigenomics of marbling and fatty acid profile in ruminant meat. animal, 12(s2), s282-s294. DOI: https://doi.org/10.1017/S1751731118001933
Laureano, M. M. M., Boligon, A. A., Costa, R. B., Forni, S., Severo, J. L. P., & Albuquerque, L. G. (2011). Estimativas de herdabilidade e tendências genéticas para características de crescimento e reprodutivas em bovinos da raça Nelore. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 63(1), 143-152. DOI: https://doi.org/10.1590/S0102-09352011000100022
Menegassi, S. R. O. (2013). Manejo de sistemas de cria em pecuária de corte. Guaíba, RS: Agrolivros.
Morrison, D. G., Feazel, J. I., Bagley, C. P., & Blouin, D. C. (1992). Postweaning growth and reproduction of beef heifers exposed to calve at 24 or 30 months of age in spring and fall seasons. Journal of animal science, 70(3), 622-630. DOI: https://doi.org/10.2527/1992.703622x
National Research Council [NRC]. (2001). Nutrient requirements of dairy cattle. Washington, DC: National Academic Press.
Owens, F. N., Dubeski, P., & Hanson, C. F. (1993). Factors that alter the growth and development of ruminants. Journal Animal Science, 71(8), 3138-3150. DOI: https://doi.org/10.2527/1993.71113138x
Patterson, D. J., Corah, L. R., Brethour, J. R., Higgins, J. J., Kiracofe, G. H., & Stevenson, J. S. (1992). Evaluation of reproductive traits in Bos taurus and Bos indicus cross bred heifers: relations hip of age at puberty to leng tho fthe post partuminterval to estrus. Journal of Animal Science, 70(5), 1994-1999.
Perry, G. A. (2012). Harnessing basic knowledge of factors controlling puberty to improve synchronization of estrus and fertility in heifers. Journal of Animal Science, 90(4), 1172-1182.
Randel, R. D., & Welsh, T. H. (2013). Interactions of feed efficiency with beef heifer reproductive development. Journal of Animal Science, 91(3), 1323-1328. DOI: https://doi.org/10.2527/jas.2012-5679
Reis, R. A., Melo, G. M. P., Bertipaglia, L. M. A., & Oliveira, A. P. (2005). Otimização da utilização da forragem disponível através da suplementação estratégica. In R. A. Reis, G. R. Siqueira, & L. M. A. Bertipaglia (Eds.), Volumosos na produção de ruminantes (p.187-238). Jaboticabal, SP: FUNEP.
Rodrigues, A. D. P., Peres, R. F. G., Lemes, A. P., Martins, T., Pereira, M. H. C., Day, M. L., & Vasconcelos, J. L. M. (2013). Progesterone-based strategies to induce ovulation in prepubertal Nellore heifers. Theriogenology, 79(1),135-141. DOI: https://doi.org/10.1016/j.theriogenology.2012.09.018
Rodrigues, A. D. P., Peres, R. F. G., Lemes, A. P., Martins, T., Pereira, M. H. C., Carvalho, E. R., & Vasconcelos, J. L. M. (2014). Effect of interval from induction of puberty to initiation of a timed AI protocol on pregnancy rate in Nellore heifers. Theriogenology, 82(5), 760-766. DOI: https://doi.org/10.1016/j.theriogenology.2014.06.008
Statistical Analyses System [SAS]. (2013) - SAS/University edition, 9.4. Cary, NC: SAS Institute Inc.
Schafhäuser Jr., J., Mancio, A. B., Fontes, C. A. A., Torres, C. A. A., Paulino, M. F., & Cecon, P. R. (2004). Desempenho reprodutivo de novilhas com diferente grau de musculosidade. Revista da Faculdade de Zootecnia, Veterinária e Agronomia, 10(1), p. 2-19.
Schillo, K.K., Hall, J.B., & Hileman, S.M. (1992). Effects of nutrition and season on the onset of puberty in beef heifer. Journal Animal Science, 70(12), 3994-4005. DOI: https://doi.org/10.2527/1992.70123994x
Schubach, K. M., Cooke, R. F., Brandão, A. P., Schumaher, T. F., Pohler, K. G., Bohnert, D. W., & Marques, R. S. (2019). Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows. Journal of Animal Science, 97(10), 4171-4181.
Semmelmann, C. E. N., Lobato, J. F. P., & Rocha, M. G. D. (2001). Effect of feeding systems on weight gain and reproductive performance of Nellore heifers bred at the age of 17/18 months. Revista Brasileira de Zootecnia, 30(3), 835-843. DOI: https://doi.org/10.1590/S1516-35982001000300032
Short, R. E., Staigmiller, R. B., Bellows, R. A., & Greer, R. C. (1994). Breeding heifers at one year of age: biological and economic considerations. In M. J. Fields, & R. S. Sand (Eds.), Factors affecting calf crop (p. 55-68). London, UK: CRC Press.
Smith, J. K., & Greiner, S. P. (2013). Selection for marbling and the impact on maternal traits. Blacksburg, VA: Department of Animal and Poultry Sciences; Virginia Polytechnic Institute and State University.
Splan, R. K., Cundiff, L. V., & Van Vleck, L. D. (1998). Genetic parameters for sex-specific traits in beef cattle. Journal of Animal Science, 76(9), 2272-2278. DOI: https://doi.org/10.2527/1998.7692272x
Valadares Filho, S. C., Costa e Silva, L. F., Lopes, S. A. Prados L. F., Chizzotti M. L., Machado P. A. S., ... Furtado, T. (2016). BR-Corte 3.0. Cálculo de exigências nutricionais, formulação de dietas e predição de desempenho de zebuínos puros e cruzados. Viçosa, MG: UFV, DZO.
Valadares Filho, S. C., Machado, P. A. S., Furtado, T., Chizzotti, M. L., & Amaral, H. F. (2015). Tabelas brasileiras de composição de alimentos para ruminantes. Viçosa, MG: Editora UFV.
Vaz, R., Restle, J., Pacheco, P., Vaz, F., PascoaL, L., & Vaz, M. (2012). Ganho de peso pré e pós-desmame no desempenho reprodutivo de novilhas de corte aos quatorze meses de idade. Ciência Animal Brasileira, 13(3), 272-281. DOI: https://doi.org/10.5216/cab.v13i3.17527
Waldner, D. N., Dikeman, M. E., Schalles, R. R., Olson, W. G., Houghton, P. L., Unruh, J. A., & Corah, L. R. (1992). Validation of real-time ultrasound technology for predicting fat thicknesses, longissimus muscle are as, and composition of Brangus bulls from 4 months to 2 years of age. Journal of Animal Science, 70(10), 3044-3054. DOI: https://doi.org/10.2527/1992.70103044x
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