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Journal of Animal Science, Vol 70, Issue 4 1045-1048, Copyright © 1992 by American Society of Animal Science

JOURNAL ARTICLE

Simple and rapid inversion of additive relationship matrices incorporating parental uncertainty

T. R. Famula
Department of Animal Science, University of California, Davis 95616-8521.

Animals bred in pastoral systems are often part of multiple-sire groups, introducing uncertainty into pedigrees. Genetic evaluation of sires and dams in such instances is complicated by the uncertainty of parenthood. This article defines a simple and rapid algorithm to compute the inverse of a numerator relationship matrix under uncertain parenthood. The algorithm can accommodate inbreeding and uncertainty of parenthood on both paternal and maternal sides of the pedigree.


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R. L. Sapp, W. Zhang, J. K. Bertrand, and R. Rekaya
Genetic evaluation in the presence of uncertain additive relationships. I. Use of phenotypic information to ascertain paternity
J Anim Sci, October 1, 2007; 85(10): 2391 - 2400.
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Copyright © 1992 by the American Society of Animal Science.