A method for deriving the genetic matrix needed for selection across combinations of breeds

A method is described for deriving the genetic matrix G needed for breeders to select across breeds for any breeding objective. The matrix comprises partitions among selection criteria (G11), between selection criteria and the breeding objective traits (G12), and among the breeding objective traits...

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Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2020-09, Vol.137 (5), p.510-519
Main Authors: Barwick, Stephen A., Johnston, David J., Walmsley, Bradley J., Jeyaruban, M. Gilbert, Boerner, Vincent
Format: Article
Language:English
Subjects:
Animals
breed differences
Breeding
Breeding - statistics & numerical data
breeding objective
genetic evaluation
Genetic Variation - genetics
Genomics - statistics & numerical data
index
Phenotype
Polymorphism, Single Nucleotide - genetics
production system
Selection, Genetic - genetics
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Summary:A method is described for deriving the genetic matrix G needed for breeders to select across breeds for any breeding objective. The matrix comprises partitions among selection criteria (G11), between selection criteria and the breeding objective traits (G12), and among the breeding objective traits (G22). A weighting procedure is used to combine the G matrix of individual breeds with known breed differences. Between‐breed variances are added to the diagonals of the matrix. Selection across many breeds can be quite different from that across a subset of the breeds. The particular breeds, and the numbers of each breed, that the breeder is prepared to consider in selection changes the genetic matrix and the selection index that should be used.
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12480