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Genomic contributions in livestock gene introgression programmes.

Eileen Wall1, Peter M Visscher, Frédéric Hospital

  • 1Institute of Cell, Animal and Population Biology, Ashworth Laboratories, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JG, Scotland. eileen.wall@sac.ac.uk

Genetics, Selection, Evolution : GSE
|April 13, 2005
PubMed
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Genomic introgression programs were analyzed using simulation and analytical methods. Results show that the number of backcross generations and chromosome length influence genomic contributions and linkage drag.

Area of Science:

  • Animal breeding and genetics
  • Quantitative genetics

Background:

  • Marker-assisted introgression is crucial for transferring desirable genes between breeds.
  • Understanding genomic composition post-introgression is key for efficient breeding programs.

Purpose of the Study:

  • To analyze the genomic composition following marker gene introgression.
  • To evaluate the impact of breeding strategies on donor genome retention and linkage drag.

Main Methods:

  • Employed analytical and simulation methods to model genomic contributions.
  • Investigated the effects of backcross generations, chromosome length, and population structure.

Main Results:

  • Theoretical predictions closely matched simulation results for genomic contributions and linkage drag.

Related Experiment Videos

  • Obligate drag was influenced by population structure, with larger offspring groups reducing it.
  • Number of backcross generations and chromosome length affected genomic contributions.

    • Conclusions:

    • Developed a framework to predict genomic composition and genetic lag after introgression.
    • Findings inform optimal strategies for animal introgression programs regarding breeding parameters.