Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Relationships Among Cow Daily Milk Yield, Calf Body Weight at Birth and 3 Month of Age and Preweaning Daily Gain in Hanwoo

한우 어미 소의 일일 산유량과 송아지의 생시체중, 3개월령 체중 및 포유기 일당증체량에 관한 상관 분석

  • Hwang, Jeong-Mi (Animal Genetic Improvement Division, National Institute of Animal Science) ;
  • Kim, Si-Dong (Animal Genetic Improvement Division, National Institute of Animal Science) ;
  • Choi, Jae-Gwan (Animal Genetic Improvement Division, National Institute of Animal Science) ;
  • Lee, Chae-Young (Ilsong Institute of Life Science, Hallym University) ;
  • Kim, Byung-Wan (Division of Animal Resource Science, College of Animal Life Sciences, Kangwon National University) ;
  • Kim, Jong-Bok (Division of Animal Resource Science, College of Animal Life Sciences, Kangwon National University)
  • 황정미 (농촌진흥청 축산과학원 축산자원개발부) ;
  • 김시동 (농촌진흥청 축산과학원 축산자원개발부) ;
  • 최재관 (농촌진흥청 축산과학원 축산자원개발부) ;
  • 이채영 (한림대학교 일송생명과학연구소) ;
  • 김병완 (강원대학교 동물생명과학대학) ;
  • 김종복 (강원대학교 동물생명과학대학)
  • Published : 2008.10.01
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Abstract

This study was conducted to investigate relationships among cow daily milk yield, calf body weight at birth and 3 month of age and calf preweaning daily gain. Cow daily milk yield(DMILK) of 90 days after postpartum measured by weigh-suckle-weight method, calf birth weight(BW), calf body weight at 3 month of age(WT3), and calf preweaning daily gain from birth to 3 month of age(PDG) were collected from June to November on 2002 and April to November on 2003. All traits studied were considered as cow traits and analysed by WOMBAT packages to obtain A-I REML(average information restricted maximum likelihood) estimates. Heritability estimate of daily milk yield uncorrected for cow-calf separation time(DMILK) was 0.39, which was not differ from 0.36 of heritability estimate corrected on the basis of 24 hour cow-calf separation time(CMILK). Heritability estimates for maternal genetic effects of BW, WT3 and PDG were respectively 0.28, 0.17 and 0.18. Genetic correlations between DMILK and maternal effect of BW, WT3 and PDG were respectively 0.59, 0.79 and 0.68. High genetic correlation coefficients of DMILK with WT3 and PDG indicate that selections for maternal breeding value for WT3 or PDG may be effective to enhance the cow’s milk production ability in Hanwoo.

본 연구는 암소의 산유량, 송아지의 생시 체중, 3개월령 체중 및 포유기 일당증체량들 간의 상관관계를 규명하기 위하여 실시하였다. 분석에 이용된 자료는 축산기술연구소 대관령지소(현 축산과학원 한우시험장)에서 2002년 6월부터 11월 사이에 128쌍 그리고 2003년 4월부터 11월 사이에 94쌍 등 총 222쌍의 암소와 포유중인 송아지로부터 조사하였는데 조사된 형질 중 암소의 산유량은 포유전후 체중차를 이용하여 추정하였다. 조사된 형질들은 모두 어미소 형질로 간주하여 분석을 하였는데 유전모수 추정은 A-I REML(average information restricted maximum likelihood) 추정치를 제공하는 Meyer(2006)의 WOMBAT package를 이용하여 실시하였다. 일일 산유량과 24시간 보정 산유량의 유전력은 각각 0.39와 0.36으로 두 추정치 간에 차이가 없었다. 어미소 형질로 간주하여 추정한 송아지의 생시체중, 3개월령 체중 및 포유기 일당증체량에 대한 유전력은 각각 0.28, 0.17 및 0.18로서 생시체중의 유전력은 3개월령 체중이나 포유기 일당증체량의 유전력에 비해 약간 큰 편이었으며 3개월령 체중과 포유기 일당증체량 간에는 유전력의 크기에서 차이가 없었다. 일일 산유량은 생시체중, 3개월령 체중 및 포유기 일당증체량에 대한 모체 효과 들과의 유전 상관계수가 각각 0.59, 0.79 및 0.68이었다. 일일산유량이 3개월령 체중이나 포유기 일당증체량의 모체효과 간에 높은 유전상관 관계가 있는 것으로 나타난 결과에 근거할 때 한우 집단에서 송아지의 포유기 일당증체량 또는 3개월령 체중의 모체 유전 효과에 대한 선발을 통해 암소들의 산유량에 대한 유전적 개량을 실현할 수 있을 것으로 판단된다.

Keywords

References

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