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Journal of Animal Science Abstract - Animal Genetics

Technical note: Updating the inverse of the genomic relationship matrix1


This article in JAS

  1. Vol. 91 No. 6, p. 2583-2586
    Received: Nov 6, 2012
    Accepted: Mar 7, 2013
    Published: November 25, 2014

    2 Corresponding author(s):

  1. K. Meyer 2,
  2. B. Tier and
  3. H.-U. Graser
  1. Animal Genetics and Breeding Unit3, University of New England, Armidale New South Wales 2351, Australia


A computing strategy to update the inverse of the genomic relationship matrix when new genotypes become available is described. It is shown that re-using results of previous computations can result in substantial reductions in computing time required. For instance, when the number of individuals increased by about 1% for matrices larger than 15,000, the time required for updating was less than 7% of that used for direct inversion from scratch.

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