FIXATION PROBABILITIES AND FIXATION TIMES IN A SUBDIVIDED POPULATION
نویسندگان
چکیده
منابع مشابه
Fixation Probabilities and Times
Within a population, any allele must ultimately persist or be lost. If, sometime in the future, all members of the population are descendants of the allele, then that allele is said to have fixed within the population. If, sometime in the future, no members of the population are descendants of the allele, then that allele is said to have been lost. Using mathematical models, the probability of ...
متن کاملFixation indices in subdivided populations.
Without restricting the evolutionary forces that may be present, the theory of fixation indices, or F-statistics, in an arbitrarily subdivided population is developed systematically in terms of allelic and genotypic frequencies. The fixation indices for each homozygous genotype are expressed in terms of the fixation indices for the heterozygous genotypes. Therefore, together with the allelic fr...
متن کاملFixation probability and time in subdivided populations.
New alleles arising in a population by mutation ultimately are either fixed or lost. Either is possible, for both beneficial and deleterious alleles, because of stochastic changes in allele frequency due to genetic drift. Spatially structured populations differ from unstructured populations in the probability of fixation and the time that this fixation takes. Previous results have generally mad...
متن کاملEffect of dominance on heterozygosity and the fixation probability in a subdivided population.
Under the assumptions of a subdivided population and the presence of dominance for fitness, the expected sum of heterozygosity in the total population during the lifetime of mutant was investigated. It was shown analytically and by computer simulations that in the island model the effect of dominance on the expected sum of heterozygosity decreases as the migration rate decreases and is lost alm...
متن کاملFixation probabilities for simple digraphs
The problem of finding birth–death fixation probabilities for configurations of normal andmutants on an N-vertex graph is formulated in terms of a Markov process on the 2N-dimensional state space of possible configurations. Upper and lower bounds on the fixation probability after any given number of iterations of the birth–death process are derived in terms of the transition matrix of this proc...
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ژورنال
عنوان ژورنال: Evolution
سال: 1981
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.1981.tb04911.x