Pregnancy rate and first-service conception rate in Angus heifers

Journal of Animal Science

Volumn 84, Issue 8, 2006, Pages 2022-2025

  Bormann, J Minick ^a   Totir, L R ^b   Kachman, S D ^c   Fernando, R L ^b   Wilson, D E ^b  

^a KANSAS STATE UNIVERSITY   (United States)

^b IOWA STATE UNIVERSITY   (United States)

^c UNIVERSITY OF NEBRASKA LINCOLN   (United States)

Author keywords

Beef cattle; Fertility; Genetics; Pregnancy

Indexed keywords

ANIMAL; ARTICLE; BREEDING; CATTLE; FEMALE; FERTILITY; GENETICS; MALE; PHYSIOLOGY; PREGNANCY;

ANIMALS; BREEDING; CATTLE; FEMALE; FERTILITY; MALE; PREGNANCY; PREGNANCY, ANIMAL;

ANIMALIA;

EID: 33748414026     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/jas.2005-615     Document Type: Article

References (19)

1. American Angus Association. 2004. Angus trait heritabilities and genetic correlations. Available: http://www.angus.org/sireeval/heritabilities.html Accessed Mar. 13, 2004.
2. American Angus Association. 2003. AHIR average adjusted weights and measurements by year. Available: http://www.angus.org/sireeval/ahir_ave.html Accessed Dec. 23, 2003.
3. Dearborn, D. D., R. M. Koch, L. V. Cundiff, K. E. Gregory, and G. E. Dickerson. 1973. An analysis of reproductive traits in beef cattle. J. Anim. Sci. 36:1032-1040.
4. Doyle, S. P., B. L. Golden, R. D. Green, and J. S. Brinks. 2000. Additive genetic parameter estimates for heifer pregnancy and subsequent reproduction in Angus females. J. Anim. Sci. 78:2091-2098.
5. Doyle, S. P., R. D. Green, B. L. Golden, G. L. Mathiews, C. R. Cornstock, and D. G. LeFever. 1996. Genetic parameter estimates for heifer pregnancy rate and subsequent rebreeding rate in Angus cattle. J. Anim. Sci. 74(Suppl. 1):117. (Abstr.)
6. Evans, J. L., B. L. Golden, R. M. Bourdon, and K. L. Long. 1999. Additive genetic relationships between heifer pregnancy and scrotal circumference in Hereford cattle. J. Anim. Sci. 77:2621-2628.
7. Gianola, D. 1979. Heritability of polychotomous characters. Genetics 93:1051-1055.
8. Gianola, D., and J. L. Foulley. 1983. Sire evaluation for ordered categorical data with a threshold model. Genet. Sel. Evol. 15:201-223.
9. Hetzel, D. J. S., M. J. Mackinnon, R. Dixon, and K. W. Entwistle. 1989. Fertility in a tropical beef herd divergently selected for pregnancy rate. Anim. Prod. 49:73-81.
10. Kachman, S. D., and R. L. Fernando. 2002. Analysis of generalized linear mixed models with MATVEC. Proc. 7th World Congr. Genet. Appl. Livest. Prod. CDROM Commun. No. 28-04.
11. Martinez-Velazquez, G., K. E. Gregory, G. L. Bennett, and L. D. Van Vleck. 2003. Genetic relationships between scrotal circumference and female reproductive traits. J. Anim. Sci. 81:395-401.
12. Mathiews, G. L., R. D. Green, J. S. Brinks, B. L. Golden, R. M. Enns, and D. G. LeFever. 1995. Genetic parameters for conception rate to synchronized breeding in Angus cattle. Proc. West. Sec. Am. Soc. Anim. Sci. 46:217-219.
13. Morris, C. A., R. L. Baker, D. L. Johnson, A. H. Carter, and J. C. Hunter. 1987. Reciprocal crossbreeding of Angus and Hereford cattle 3. Cow weight, reproduction, maternal performance, and lifetime production. N. Z. J. Agric. Res. 30:453-467.
14. Morris, C. A., and N. G. Cullen. 1994. A note on genetic correlations between pubertal traits of males or females and lifetime pregnancy rate in beef cattle. Livest. Prod. Sci. 39:291-297.
15. Morris, C. A., J. A. Wilson, G. L. Bennett, N. G. Cullen, S. M. Hickey, and J. C. Hunter. 2000. Genetic parameters for growth, puberty, and beef cow reproductive traits in a puberty selection experiment. N. Z. J. Agric. Res. 43:83-91.
16. Mwansa, P. B., R. A. Kemp, D. H. Crews, Jr., J. P. Kastelic, D. R. C. Bailey, and G. H. Coulter. 2000. Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle. Can. J. Anim. Sci. 80:507-510.
17. Oehlert, G. W. 1992. A note on the delta method. Am. Stat. 46:27-29.
18. Thallman, R. M., L. V. Cundiff, K. E. Gregory, and R. M. Koch. 1999. Germplasm evaluation in beef cattle-Cycle IV: Postweaning growth and puberty of heifers. J. Anim. Sci. 77:2651-2659.
19. Toelle, V. D., and O. W. Robison. 1985. Estimates of genetic correlations between testicular measurements and female reproductive traits in cattle. J. Anim. Sci. 60:89-100.