Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
권호 표지

Study on Estimation of Relative Conception Rate in Hanwoo Bull

한우 씨수소의 상대적 수정능 추정에 관한 연구

  • 이성수 (농협중앙회 한우개량사업소) ;
  • 노승희 (농협중앙회 한우개량사업소) ;
  • 박노형 (국립한경대학교 낙농학과) ;
  • 원유석 (농협중앙회 한우개량사업소)
  • Received : 2010.02.03
  • Accepted : 2010.03.03
  • Published : 2010.03.31
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Abstract

The conception rate of cow is a major factor in farm management. The environment of farm and management of cow are the best influencing factors on conception rate, and the fertility of bull is the second influencing factor. In Hanwoo bull, however, the informations limited to performance and carcass traits have been offered to Hanwoo farmer. Therefore, this study analysed the estimated relative conception rates (ERCR) for estimation of fertility of bulls, using the 8,892 mating data with 116 heads of prove bull to produce progeny. Mean of least square means of conception rate after first insemination was 50.95% in bull herds. On the standard of this mean, ERCRs after first insemination of each bull were analysed. Values ranged from -26.1% to +21.0%, the difference was 47.1%. Among 116 heads of bull analysed, KPN582 showed the highest ERCR as 21.0%, KPN550 (18.3%), KPN656 (16.7%), KPN632 (15.8%), KPN690 (14.9%) were gone behind, but KPN621 was the lowest as -26.1%, KPN680 (-21.3%), KPN674 (-16.2%), KPN569 (-15.9%), KPN699 (-14.9%) were succeeded. If ERCRs of Hanwoo bull will be offered to Hanwoo farmer, it will be worthwhile.

Keywords

References

  1. Bonnann JM, Totir LR, Kachman SD, Fernando RL, and Wilson DE. 2006. Pregnancy rate and first-service conception rate in Angus heifers. J. Anim. Sei. 84:2022-2025. https://doi.org/10.2527/jas.2005-615
  2. Clay JS, McDaniel BT and Brown CH. 2004. Variances of and correlations among progeny tests for reproductive traits of cows sired by AI bulls. J. Dairy Sci. 87:2307-2313. https://doi.org/10.3168/jds.S0022-0302(04)70052-1
  3. Dearborn DD, Koch RM, Cundiff LV, Gregory KE and Dikerson GE. 1973. An analysis of reproductive traits in beef cattle. J. Anim. Sci. 36:1032-1040.
  4. DRMS-Bull Fertility Summary. May 2004. http://www.dnns.org/ sire.htm.
  5. Morris CA and Cullen NG. 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. https://doi.org/10.1016/0301-6226(94)90291-7
  6. Murray BB, Scheffer LR, and Burnside EB. 1983. Heritability of nonreturn rate of Canadian Holstein-Friesian bulls. Can. J. Anim. Sci. 63:39-48. https://doi.org/10.4141/cjas83-005
  7. Mwansa PB, Kemp RA, Crews DH, Kastelic Jr JP, Bailey DRC and Coulter GR. 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. https://doi.org/10.4141/A99-135
  8. Nadarajah K, Burnside EB and Scheffer LR. 1988. Genetic parameters for fertility of dairy bulls. J. Dairy Sci. 71 :2730- 2734. https://doi.org/10.3168/jds.S0022-0302(88)79866-5
  9. Stalhammer EM, Janson L and Philipsson J. 1994. Genetic studies on fertility in A.I. bulls. II. Environmental and gcnctic effects on non-return rates of young bulls. Anim. Rcprod. Sci. 34:193-207. https://doi.org/10.1016/0378-4320(94)90016-7
  10. Thallmann RM, Cundiff LV, Gregory KE and Koch RM. 1999. Germplasm evaluation in beef cattle-cycle IV: Postweaning growth and puberty of heifers. J. Anim. Sci. 77: 2651-2659.
  11. Weigel KA. Prospects for improving reproductive performance through gcnetic selection. 2006. Animal Reproduction Science 96:323-330. https://doi.org/10.1016/j.anireprosci.2006.08.010