Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Estimation of Genetic Trend on Racing Time of Thoroughbred Racehorses

더러브렛 경주마의 주파기록에 대한 유전적 개량량의 추정

  • Park, K.D. (National Institute of Animal Science) ;
  • Son, S.K. (National Institute of Animal Science) ;
  • Rho, S.H. (National Institute of Animal Science) ;
  • Cho, K.H. (National Institute of Animal Science) ;
  • Lee, Z.H. (National Institute of Animal Science) ;
  • Cho, B.W. (Pusan National University)
  • Published : 2008.02.01
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Abstract

The objective of this study was to estimate genetic trend on racing time of Thoroughbred racehorses in Korea, using a total of 209,725 racing records of 9,934 racehorses collection from January, 1990 to December, 2006. Phenotypic trends for all distances were negative at a rate of －0.148, －0.137, －0.137 and －0.139 second per race year for distances of 1,000m, 1,400m less than, 1,700m more than and overall dataset, respectively. Environmental trends were similar to phenotypic ones in all distances and trends in permanent environmental and jockey effects by race year were not found. Average genetic improvements for racing time were －0.037 and －0.030 second per race year at the 1,000m and overall dataset, respectively, which is low. But Genetic trends were decreased consistently. There is need to establish the genetic improvement program for quality of racehorses.

본 연구의 목적은 1990년 1월부터 2006년 12월사이에 경주한 9,934두의 주파기록, 총 209,725개를 이용하여 국내 더러브렛 경주마의 유전적 개량량을 추정하는데 있다. 주파기록에 대한 연간 표현형 개량량은 1,000m, 1,400m 이하, 1,700m 이상의 경주거리와 전체 자료에서 각각 －0.148초, －0.137초, －0.137초와 －0.139초였으며, 모든 경주거리에서 감소 추세를 나타내었다. 경주년도별 환경효과의 추세는 모든 경주거리에서 표현형 추세와 거의 일치하였으며, 영구환경효과와 기수효과의 추세는 거의 나타나지 않았다. 연간 유전적 개량량은 1,000 m와 전체 자료에서 각각 －0.037과 －0.030초로 다소 낮은 수치였으나 일괄적인 감소 추세를 나타내었다. 따라서 경주마의 질적 향상을 위한 개량계획을 설정하는 것이 시급한 과제라 생각된다.

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