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The Effect of Migration on Maximum Opportunity for Selection

Published online by Cambridge University Press:  31 July 2008

Motofumi Masaki
Motofumi Masaki
Affiliation:
Center for Demographic and Population Genetics, School of Biomedical Sciences, University of Texas, Houston, USA
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Summary

The effect of migration on the maximum opportunity for selection is analysed using koseki data, the Japanese family registration records, of a village population in a small island. When selection intensity is divided into two components, migration greatly influences the variance of the mortality component of the original formula. The difference in selection intensity, with and without allowance for migration, is conspicuous in the recent cohort; the intensity, with a migration component, shows a consistent increase, whereas it declined in the original formula. The implications of this are discussed in the context of the genetic structure of a population of small size, changing rapidly over time.

Type
Research Article
Information
Journal of Biosocial Science , Volume 20 , Issue 3 , July 1988 , pp. 337 - 344
Copyright
Copyright © Cambridge University Press 1988

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