Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
권호 표지

Relationships of Scrotal Circumference of Hanwoo Sire to Semen Characteristics and Conception Rate of Artificial Insemination in Farm

한우 씨수소의 고환 둘레와 정액 성상 및 농가 인공수정 수태율과의 관계

  • 이성수 (농협중앙회 한우개량사업소) ;
  • 노승희 (농협중앙회 한우개량사업소) ;
  • 박노형 (국립한경대학교 낙농학과) ;
  • 원유석 (농협중앙회 한우개량사업소)
  • Received : 2009.10.12
  • Accepted : 2010.02.18
  • Published : 2010.03.31
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Abstract

The relationships of scrotal circumference (SC) to semen characteristics and the conception rate (70 days-nonreturn rate) of artificial insemination in farm were studied with 137 heads of bull in Hanwoo. The average and range of SC were $38.27{\pm}3.90$ cm and 26.0~52.5 cm, respectively. Hanwoo bulls were classified with SC, divided into 34 cm below group, 34~39 cm group, and 39 cm over group. The 5,487 semen records of 43 heads of bull from July. 1. 2007 to June. 30. 2008. were used to determine the relationships between SC and semen characteristics. The semen concentration and total sperm number of each group were 11.18, 16.68, and $17.4{\times}10^8/ml$, and 69.83, 101.64 and $114.40{\times}10^8$/ejaculate. The bulls with 34 cm or more SC were higher than the bulls with 34 cm below in semen concentration and total sperm number (p<0.01). But between SC and semen volume have no significant relationship (p>0.05). The 9,862 mating records of 44 farm with 137 heads of bull were used to determine the relationships between SC and conception rate. The conception rate of 1st artificial insemination were 73.31, 74.16, and 77.33 % in each group. Also SC was positively correlated with pregnancy rate (r=0.12, p=0.17). These results indicate that SC correlates positively with semen characteristics, and maybe with pregnancy rate in Hanwoo.

Keywords

References

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