mutation pressure


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mutation pressure

gene frequency changes caused by mutations.
References in periodicals archive ?
The observed temporal changes in the means and among-line variances are consistent with a fairly high mutation pressure to new alleles with fairly small effects.
The first genetic model explicitly incorporating mutation pressure on the evolution of age-specific mortality patterns was developed by Charlesworth (1990).
If deleterious mutations have pleiotropic effects on both juvenile and adult age classes, mutation pressure will push adult mortality above its optimal value.
With these modes of propagation, progeny typically inherit the full load of deleterious mutations carried by their parents (with only a slight deviation from this for recently arisen mutations in selfers) as well as acquire new mutations, and this mutation pressure combined with random genetic drift leads to an expected progressive decline in fitness (Muller 1964; Felsenstein 1974; Haigh 1978; Pamilo et al.
For Osawa, the primal force driving code evolution is "directional mutation pressure.
Surprisingly, Osawa does not discuss the evolution of the mutation pressure at all, so we cannot know precisely why he thinks it varies so much between species or what forces are causing the evolution.
It is assumed that any bias in mutation pressure on t, t[prime], and p is negligibly small.
For very large K (at least on the order of billions) and weak mutation pressure (