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2003 Fiscal Year Final Research Report Summary

Construction of selection and mating systems for maximizing genetic diversity in animal populations with overlapping generations

Research Project

Project/Area Number 14560241
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied animal science
Research InstitutionKyoto Sangyo University

Principal Investigator

NOMURA Tetsuro  Kyoto Sangyo University, Faculty of Engineering, Professor, 工学部, 教授 (50189437)

Project Period (FY) 2002 – 2003
Keywordsgenetic diversity / animal population / overlapping generations / coancestry / selection / 集団の有効な大きさ
Research Abstract

Minimization of the average coancestry in a population has been theoretically proven to be the most efficient method to preserve genetic diversity. In the present study, based on a population genetic model, two selection methods to minimize the average coancestry in populations with overlapping generations were developed. For a given parental coancestry structure, the first method (OG) minimizes the average coancestry in the next generation, and the second method (LT) is designed to minimize the long-term accumulation of coancestry. The efficiencies of the two selection methods were examined by stochastic simulation. Compared to the method with random selection of parents, the annual effective population sizes under the two propose methods increased to 2-3 folds. The difference among the two selection methods was small in a population with short generation interval. For populations with long generation intervals, OG method showed a slightly larger annual effective size in an initial few years. However, in the proceeding years, LT method gave a 5-15% larger annual effective size than OG method. From these results, it is suggested that LT method would be preferred to OG method in most practical situations.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] T.Nomura: "Effective size of populations with unequal sex ratio and variation in mating success."Journal of Animal Breeding and Genetics. 118. 297-310 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Nomura: "Effective size of populations with heritable variation in fitness."Heredity. 89. 413-416 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Honda: "Gene dropping analysis of founder contributions in a closed Japanese Black cattle population."Animal Science Journal. 73. 105-111 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Honda: "Pedigree analysis of genetic subdivision in a population of Japanese Black cattle."Animal Science Journal. 73. 445-452 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Honda: "Monitoring of genetic diversity in the Japanese Black cattle population by the use of pedigree information."Journal of Animal Breeding and Genetics. (in press). (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Nomura: "Effective size of populations with unequal sex ratio and variation in mating success"Journal of Animal Breeding and Genetics. 118. 297-310 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Nomura: "Effective size of populations with heritable variation in fitness."Heredity. 89. 413-416 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Honda, T.Nomura, M.Fukushima, F.Mukai.: "Gene dropping analysis of founder contributions in a closed Japanese Black cattle population."Animal Science Journal. 73. 105-111 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Honda, T.Nomura, Y.Yamaguchi, F.Mukai.: "Pedigree analysis of genetic subdivision in a population of Japanese Black cattle."Animal Science Journal. 73. 445-452 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Honda, T.Nomura, Y Yamaguchi, F.Mukai.: "Monitoring of genetic diversity in the Japanese Black cattle population by the use of pedigree information."Journal of Animal Breeding and Genetics. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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