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Interrelations between effective population size and other pedigree tools for the management of conserved populations

Published online by Cambridge University Press:  01 June 2000

ARMANDO CABALLERO  and
MIGUEL A. TORO
ARMANDO CABALLERO
Affiliation:
Departamento de Bioquímica, Genética e Immunología, Facultad de Ciencias, Universidad de Vigo, 36200 Vigo, Spain
MIGUEL A. TORO
Affiliation:
Departamento de Mejora, Genética y Biotecnología, INIA, Carretera de la Coruña Km. 7, 28040 Madrid, Spain
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Abstract

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Genetic parameters widely used to monitor genetic variation in conservation programmes, such as effective number of founders, founder genome equivalents and effective population size, are interrelated in terms of coancestries and variances of contributions from ancestors to descendants. A new parameter, the effective number of non-founders, is introduced to describe the relation between effective number of founders and founder genome equivalents. Practical recommendations for the maintenance of genetic variation in small captive populations are discussed. To maintain genetic diversity, minimum coancestry among individuals should be sought. This minimizes the variances of contributions from ancestors to descendants in all previous generations. The method of choice of parents and the system of mating should be independent of each other because a clear-cut recommendation cannot be given on the latter.

Type
Research Article
Information
Genetics Research , Volume 75 , Issue 3 , June 2000 , pp. 331 - 343
Copyright
© 2000 Cambridge University Press