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Approximation of Multiple Trait Effective Daughter Contribution by Dairy Proven Bulls for MACE

젖소 국제유전능력 평가를 위한 종모우별 다형질 Effective Daughter Contribution 추정

  • Cho, Kwang-Hyun (National Institute of Animal Science, R.D.A.) ;
  • Choi, Tae-Jeong (National Institute of Animal Science, R.D.A.) ;
  • Cho, Chung-Il (National Institute of Animal Science, R.D.A.) ;
  • Park, Kyung-Do (Genomic Informatics Center, Hankyong National University) ;
  • Do, Kyoung-Tag (Genomic Informatics Center, Hankyong National University) ;
  • Oh, Jae-Don (Genomic Informatics Center, Hankyong National University) ;
  • Lee, Hak-Kyo (Genomic Informatics Center, Hankyong National University) ;
  • Kong, Hong-Sik (Genomic Informatics Center, Hankyong National University) ;
  • Lee, Joon-Ho (Genomic Informatics Center, Hankyong National University)
  • 조광현 (농촌진흥청 국립축산과학원) ;
  • 최태정 (농촌진흥청 국립축산과학원) ;
  • 조충일 (농촌진흥청 국립축산과학원) ;
  • 박경도 (국립한경대학교 유전정보연구소) ;
  • 도경탁 (국립한경대학교 유전정보연구소) ;
  • 오재돈 (국립한경대학교 유전정보연구소) ;
  • 이학교 (국립한경대학교 유전정보연구소) ;
  • 공홍식 (국립한경대학교 유전정보연구소) ;
  • 이준호 (국립한경대학교 유전정보연구소)
  • Received : 2013.07.15
  • Accepted : 2013.08.21
  • Published : 2013.10.31

Abstract

This study was conducted to investigate the basic concept of multiple trait effective daughter contribution (MTEDC) for dairy cattle sires and calculate effective daughter contribution (EDC) by applying a five lactation multiple trait model using milk yield test records of daughters for the Multiple-trait Across Country Evaluation (MACE). Milk yield data and pedigree information of 301,551 cows that were the progeny of 2,046 Korean and imported dairy bulls were collected from the National Agricultural Cooperative Federation and used in this study. For MTEDC approximation, the reliability of the breeding value was separated based on parents average, own yield deviation and mate adjusted progeny contribution. EDC was then calculated by lactation using these reliabilities. The average number of recorded daughters per sire by lactations were 140.57, 94.24, 55.14, 29.20 and 14.06 from the first to fifth lactation, respectively. However, the average EDC per sire by lactation using the five lactation multiple trait model was 113.49, 89.28, 73.56, 54.02 and 35.08 from the first to fifth lactation, respectively, while the decrease of EDC in late lactations was comparably lower than the average number of recorded daughters per sire. These findings indicate that the availability of daughters without late lactation records is increased by genetic correlation using the multiple trait model. Owing to the relatedness between the EDC and reliability of the estimated breeding value for sire, understanding the MTEDC algorithm and continuous monitoring of EDC is required for correct MACE application of the five lactation multiple trait model.

Keywords

EDC;MACE;Multiple trait model;Breeding value;Milk yield

Acknowledgement

Supported by : 농촌진흥청

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