Evaluation of reproductive performance of primiparous beef heifers at two years old;Avaliação do desempenho reprodutivo de novilhas de corte primíparas aos dois anos de idade

Revista Brasileira de Zootecnia

Volumn 31, Issue 3 SUPPL, 2002, Pages 1388-1395

  da Rocha, Marta Gomes ^a   Lobato, José Fernando Piva ^b  

^a FEDERAL UNIVERSITY OF SANTA MARIA   (Brazil)

^b FEDERAL UNIVERSITY OF RIO GRANDE DO SUL   (Brazil)

Author keywords

Age at first calving; Beef heifers; Crossbreeding; Production systems

Indexed keywords

EID: 3543126159     PISSN: 15163598     EISSN: 18069290     Source Type: Journal    
DOI: 10.1590/S1516-35982002000600009     Document Type: Article

References (36)

1. BAILEY, C.M.; HANKS, D.R.; FOOTE, W.D. et al. Maternal characteristics of young dams representing Bos taurus and Bos indicus x Bos taurus breed types. Journal of Animal Science, v.66, n.5, p.1144-1152, 1988.
2. BERGMANN, J.A.G.; HOHENBOKEN, W.D. Prediction of fertility from calfhood traits of Angus and Simenthal heifers. Journal of Animal Science, v.70, n.8, p.2611-2621, 1992.
3. BUSKIRK, D.D.; FAULKNER, D.B.; IRELAND, F.A. Increased postweaning gain of beef heifers enhances fertility and milk production. Journal of Animal Science, v.73, n.4, p.937-946, 1995.
4. CACHAPUZ, J.M.S. O panorama setorial da bovinocultura de corte gaúcha no processo de integração do MERCOSUL. 2.ed. Porto Alegre: EMATER, 1995. 68p. (Série Realidade Rural, 7).
5. CARTER, A.H.; COX, E.H. Observations on yearling mating of beef cattle. In: NEW ZEALAND SOCIETY OF ANIMAL PRODUCTION, 33., 1973, Palmerston North. Proceedings. Palmerston North: New Zealand Society of Animal Production, 1973. p.94-113.
6. ELLIS, R.M. The relationship between percentage calving and weight at joining in yearling Hereford heifers. In: AUSTRALIAN SOCIETY OF ANIMAL PRODUCTION, 10., 1974, Sydney. Proceedings. Sydney: 1974. p.55-58.
7. FERREL, C.L. Effects of postweanig rate of gain on onset of puberty and productive performance of heifers of different breeds. Journal of Animal Science, v.55, n.6, p.1272-1284, 1982.
8. GREGORY, K.E.; LASTER, D.B.; CUNDIFF, L.V. et al. Heterosis and breed maternal and transmitted effects in beef cattle. II. Growth rate and puberty in females. Journal of Animal Science, v.47, n.5, p.1042-1053, 1978.
9. HALL, J.B.; SHILLO, K.K.; FITZGERALD, B.P. et al. Effects of recombinant bovine somatotropin and dietary energy intake on growth, secretion of luteinizing hormone, follicular development, and onset of puberty in beef heifers. Journal of Animal Science, v.72, n.3, p.709-718, 1995.
10. LASTER, D.B.; SMITH, G.M.; CUNDIFF, L.V. et al. 1979. Characterization of biological types of cattle (cycle II) II. Postweaning growth and puberty of heifers. Journal of Animal Science, v.48, n.3, p.500-507, 1979.
11. LOWMAN, B.G.; SCOTT, N.; SOMERVILLE, S. Condition scoring beef cattle. Edinburgh: East of Scotland College of Agriculture, 1973. 8p. (Bulletin, 6).
12. MAGALHÃES, F.R.; PEREIRA, P.A.; LOBATO, J.F.P. Influência da idade ao primeiro parto no desempenho reprodutivo de novilhas de corte. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 27., 1990, Campinas. Anais.Campinas: Sociedade Brasileira de Zootecnia, 1990. p.369.
13. McMILLAN, W.H.; McCALL, D.G. Are yearling heifer mating and more productive beef cows breeds a worthwhile use of winter feed In: NEW ZEALAND SOCIETY OF ANIMAL PRODUCTION, 51., 1991, Palmerston North. Proceedings. Palmerston North: New Zealand Society of Animal Production, 1991. p.265-269.
14. McMILLAN, W.H.; MORRIS, C.A.; McCALL, D.G. 1992. Modelling herd efficiency in liveweight-selected and control Angus cattle. In: NEW ZEALAND SOCIETY OF ANIMAL PRODUCTION, 52., 1992, Palmerston North. Proceedings. Palmerston North: New Zealand Society of Animal Production, 1992. p.145-147.
15. McSHANE, T.M.; SCHILLO, K.K.; BOLING, J.A. et al. Effects of recombinant DNA-derived somatotropin and dietary energy intake on development of beef heifers. I. Growth and puberty. Journal of Animal Science, v.67, n.8, p.2230-2237, 1989.
16. MIELITZ NETTO, C.G.A. Modernização e diferenciação na bovinocultura de corte brasileira. Campinas: Universidade Estadual de Campinas, 1994. 224p. Tese (Doutorado em Economia) - Universidade Estadual de Campinas, 1994.
17. MILAGRES, J.C.; DILLARD, E.V.; ROBINSON, O.W. Influences of age and early growth on reproductive performance of yearling Hereford heifers. Journal of Animal Science, v.48, n.5, p.1089-1095, 1979.
18. MORENO, J.A. Clima do Rio Grande do Sul. Porto Alegre: Secretaria da Agricultura, 1961. 42p. NATIONAL RESEARCH COUNCIL - N.R.C. Nutrient requirement of beef cattle. 7.ed. Washington, D.C.: 1996. 242p.
19. NUÑEZ-DOMINGUEZ, R.; CUNDIFF, L.V.; DICKERSON, G.E. et al. Lifetime production of beef heifers calving first at two vs. three years of age. Journal of Animal Science, v.69, n.9, p.3467-3479, 1991.
20. PATTERSON, D.J.; CORAH, L.R.; BRETHOUR, J.R. et al. Evaluation of reproductive traits in Bos taurus and Bos indicus crossbred heifers: relationship of age at puberty to length of the postpartum interval to estrus. Journal of Animal Science, v.70, n.5, p.1994-1999, 1992.
21. PATTERSON, D.J.; CORAH, L.R.; BRETHOUR, J.R. et al. Evaluation of reproductive traits in Bos taurus and Bos indicus crossbred heifers: effects of postweaning energy manipulation. Journal of Animal Science, v.69, n.6, p.2349-2361, 1991.
22. PATTERSON, D.J.; CORAH, L.R.; KIRACOFE, G.H. et al. Conception rate in Bos taurus and Bos indicus crossbred heifers after postweaning energy manipulation and synchronization of estrus with melengestrol acetate and fenprostalene. Journal of Animal Science, v.67, n.5, p.1138-1142, 1987.
23. PEREIRA NETO, O.A.; LOBATO, J.F.P. Efeitos da ordem de utilização de pastagens nativas melhorada no desenvolvimento e comportamento reprodutivo de novilhas de corte. Revista Brasileira de Zootecnia, v.27, n.1, p.60-65, 1998.
24. PÖTTER, L.; LOBATO, J.F.P.; MIELITZ NETTO, C.G. Produtividade de um modelo de produção para novilhas de corte primíparas aos dois, três e quatro anos de idade. Revista Brasileira de Zootecnia, v.27, n.3, p.613-615, 1998.
25. REYNOLDS, W.L.; URICK, J.J.; KNAPP, B.W. et al. Maternal breed of sire effects on postweaning performance of firstcross heifers and production of 2 year-old heifers characteristics. Journal of Animal Science, v.69, n.11, p.4368-4376, 1991.
26. RICE, L.E. Nutrition and the development of replacement heifers. Veterinary Clinics of North America. Food Animal Practice, v.7, n.1, p.27-42, 1991.
27. ROCHA, M.G. Desenvolvimento e características de produção e reprodução de fêmeas de corte primíparas aos dois anos de idade. Porto Alegre: Universidade Federal do Rio Grande do Sul, 1997. 244p. Tese (Doutorado em Zootecnia) -Universidade Federal do Rio Grande do Sul, 1997.
28. SAS INSTITUTE. Statistical analysis systems userś guide, 4.ed. Versão 6, Cary: 1989. 1042p.
29. SAWYER, G.D.; BARKER, D.J.; MORRIS, J. 1991a. Performance of young breeding cattle in commercial herds in the south-west of Western Australia I. Liveweight, body condition, conception and fertility in heifers. Australian Journal of Experimental Agriculture, v.31, n.4, p.431-441, 1991a.
30. SAWYER, G.D.; BARKER, D.J.; MORRIS, J. Performance of young breeding cattle in commercial herds in the south-west of Western Australia I. liveweight, body condition, conception and fertility in first calf heifers. Australian Journal of Experimental Agriculture, v.31, n.4, p.443-454, 1991b.
31. SHORT, R.E.; BELLOWS, R.A. Relationship among weight gains, age at puberty and reproductive performance in heifers. Journal of Animal Science, v.32, n.5, p.1964-1970, 1971.
32. STEEL, R.G.D.; TORRIE, J.H. Bioestadística; principios y procedimentos. Mexico: McGraw-Hill, 1980. 622p TOPPS, J.H. The relationship between reproduction and undernutrition in beef cattle. World Review of Animal Production, v.13, n.2, p.43-49, 1977.
33. VARNER, L.W.; BELLOWS, R.A.; CHRISTENSEN, D.S. A management system for wintering replacement heifers. Journal of Animal Science, v.44, n.2, p.165-171, 1977.
34. VERCOE, J.E.; FRISH, J.E. Animal breeding for improved productivity. In: NUTRITIONAL LIMITS TO ANIMAL PRODUCTION FROM PASTURES, 1981, St. Lucia. Proceedings. St. Lucia: CSIRO, 1982. p.327-342.
35. WERTH, L.A.; AZZAM, S.M.; NIELSEN, M.K. et al. Use of a simulation model to evaluate the influence of reproductive performance and management decisions on net income in beef production. Journal of Animal Science, v.69, n.8, p.4710-4721, 1991.
36. YOUNG, L.D.; LASTER, D.B.; CUNDIFF, L.V. et al. Characterization of biological types of cattle. IX. Postweaning growth and puberty of three-breed cross heifers. Journal of Animal Science, v.47, n.3, p.843-852, 1978.