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Optimising multi-tier open nucleus breeding schemes

Optimising multi-tier open nucleus breeding schemes 122 85 85 2 3 R. K. Shepherd B. P. Kinghorn Queensland Department of Primary Industries Rockhampton Mail Centre P.O. Box 6014 4702 Queensland Australia Department of Animal Science University of New England 2351 Armidale New South Wales Australia Summary The constant migration ( CM ) method and the ebv migration ( EBVM ) method of optimising the design of multi-tier open nucleus breeding schemes are presented and compared. The equation for the equilibrium rate of genetic gain of a three-tier open nucleus scheme is determined using the CM method. The major advantage of the EBVM method is the reduction in the number of parameters which have to be varied in order to locate the maximum equilibrium rate of genetic gain. For the CM method for the number of variable parameters is 5, 14, 27 and (2 n + 1) ( n - 1) for unrestricted male and female migration in schemes with 2, 3, 4 and n tiers respectively. The corresponding number of variable parameters for the EBVM method is 1, 2, 3 and n -1 respectively. A procedure is given for the EBVM method so as to accomodate variance loss due to selection and variance gain due to the mixing of groups with a different mean breeding value. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png TAG Theoretical and Applied Genetics Springer Journals

Optimising multi-tier open nucleus breeding schemes

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References (8)

Publisher
Springer Journals
Copyright
Copyright © 1992 by Springer-Verlag
Subject
Life Sciences; Biotechnology; Agriculture; Biochemistry, general; Plant Biochemistry; Plant Sciences; Plant Genetics & Genomics
ISSN
0040-5752
eISSN
1432-2242
DOI
10.1007/BF00222884
pmid
24197329
Publisher site
See Article on Publisher Site

Abstract

122 85 85 2 3 R. K. Shepherd B. P. Kinghorn Queensland Department of Primary Industries Rockhampton Mail Centre P.O. Box 6014 4702 Queensland Australia Department of Animal Science University of New England 2351 Armidale New South Wales Australia Summary The constant migration ( CM ) method and the ebv migration ( EBVM ) method of optimising the design of multi-tier open nucleus breeding schemes are presented and compared. The equation for the equilibrium rate of genetic gain of a three-tier open nucleus scheme is determined using the CM method. The major advantage of the EBVM method is the reduction in the number of parameters which have to be varied in order to locate the maximum equilibrium rate of genetic gain. For the CM method for the number of variable parameters is 5, 14, 27 and (2 n + 1) ( n - 1) for unrestricted male and female migration in schemes with 2, 3, 4 and n tiers respectively. The corresponding number of variable parameters for the EBVM method is 1, 2, 3 and n -1 respectively. A procedure is given for the EBVM method so as to accomodate variance loss due to selection and variance gain due to the mixing of groups with a different mean breeding value.

Journal

TAG Theoretical and Applied Genetics – Springer Journals

Published: Nov 1, 1992

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