Abstract
Effect of Genetic Drift versus Natural Selection on Clutch Traits in Two Populations of the Nigerian Local Chickens
Highlights
In natural populations, genetic drifts and natural selection do not act in isolation; both forces are always at play
The degree to which alleles are affected by drift or selection varies according to the population size, and the magnitude of drift on allelic frequencies per generation is larger in small populations [1]
Genetic drifts acts upon the genetic frequencies within a population without regard to their phenotypic effects presenting the sampled alleles for natural selection
Summary
Genetic drifts and natural selection do not act in isolation; both forces are always at play. Genetic drifts acts upon the genetic frequencies within a population without regard to their phenotypic effects presenting the sampled alleles for natural selection. It favors the spread of alleles where phenotypic effects increase survival and or reproduction of their carriers [3]. The Nigerian local chicken populations under rural farmers are more or less under natural influence Some of these farmers keep small population sizes in isolated areas precluding the introduction of new genes from other populations. These farmers most often dispose matured birds for economic reasons or in preparation for a new settlement thereby accelerating genetic drifts through random sampling. The aim of this study was to provide information on the variability of clutch traits as affected by genetic drift through random sampling and selection in the Nigerian local chickens in relation to the life style of their keepers
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