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A note on using biased parameter values and non-random mating to reduce rates of inbreeding in selection programmes

Published online by Cambridge University Press:  02 September 2010

B. Grundy ,
A. Caballero ,
E. Santiago  and
W. G. Hill
B. Grundy
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT
A. Caballero
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT
E. Santiago
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT
W. G. Hill
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT
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Abstract

The value of a parameter such as heritability (h2) or intra-dass correlation in best linear unbiased prediction (BLUP) with the animal model or a family selection index affects both the rate of response achieved and the rate of inbreeding. If in BLUP an estimate of h2 is used which is biased upwards above its actual value, the rate of inbreeding can be substantially reduced with little reduction in the rate of response. Further, by mating individuals from families in which many are selected to others from families with few selected (compensatory mating), rates of inbreeding can be further reduced without substantial effect on response.

Keywords

best linear unbiased predictiongeneticsinbreedingmating systemsselection index
Type
Research Article
Information
Animal Production , Volume 59 , Issue 3 , December 1994 , pp. 465 - 468
Copyright
Copyright © British Society of Animal Science 1994

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