Results 221 to 230 of about 1,472,050 (256)

Gene pseudogenization in fertility-associated genes in cheetah ( Acinonyx jubatus ), a species with long-term low effective population size

Peers JA, Nash WJ, Haerty W.
europepmc   +1 more source

FLUCTUATING POPULATION SIZE AND THE RATIO OF EFFECTIVE TO CENSUS POPULATION SIZE [PDF]

Evolution; International Journal of Organic Evolution, 1997
The effective size of a population (Ne) quantifies the rate at which genetic diversity is eroded by genetic drift (i.e., 112Ne per generation), a fundamental process of evolutionary change. Genetic diversity and its rate of decay have been linked with key components of population fitness (Allendorf and Leary 1987; Ralls et al. 1988; Briscoe et al. 1992;
Leonard Nunney, John A Vucetich
exaly   +3 more sources

THE EFFECTIVE SIZE OF A HIERARCHICALLY STRUCTURED POPULATION [PDF]

Evolution; International Journal of Organic Evolution, 1999
A knowledge of the effective size of a population (Ne ) is important in understanding its current and future evolutionary potential. Unfortunately, the effective size of a hierarchically structured population is not, in general, equal to the sum of its parts. In particular, the inbreeding structure has a major influence on Ne . Here I link Ne to Wright'
Leonard Nunney
exaly   +3 more sources

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Effective population size of a population with stochastically varying size

Journal of Mathematical Biology, 2009
For a Wright-Fisher model with mutation whose population size fluctuates stochastically from generation to generation, a heterozygosity effective population size is defined by means of the equilibrium average heterozygosity of the population. It is shown that this effective population size is equal to the harmonic mean of population size if and only if
Masaru Iizuka
exaly   +3 more sources

Effective Population Size

2022
AbstractWe expect heterozygosity to be lost at a rate of 1/2N per generation in an ideal population because of genetic drift where N is the census population size. The effective size of a population is the size of the ideal (Wright–Fisher) population that will result in the same amount of genetic drift as in the actual population being considered ...
Fred W. Allendorf, W. Chris Funk, Sally N. Aitken, Margaret Byrne, Gordon Luikart   +4 more
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The Effect of Mutation on Population Size

Nature, 1973
AFTER the work of Haldane1 and Muller2, much has been written about the genetic load caused by mutation. This mutational load had been defined as the fraction by which the mean fitness of a population subject to mutation differs from the fitness of the wild (non-mutant) genotype3. The operational definition of load is then
openaire   +2 more sources

The Effective Size of Fluctuating Populations

Theoretical Population Biology, 2001
We consider a Wright-Fisher model whose population size is an autocorrelated stochastic process. Our interest is in the effects of autocorrelated fluctuations of the population size on the effective size. We define the inbreeding effective size and the variance effective size and show that these effective sizes are the same for this model.
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Effective size of populations with overlapping generations

Theoretical Population Biology, 1972
Abstract General formulae are derived for the effective sizes (numbers) of random mating populations of constant size and sex ratio with overlapping generations. They are found to equal the effective sizes of populations with discrete generations which have the same number of individuals entering the population each generation and the same variance ...
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Genetic Effects of Population Size Reduction

Nature, 1968
How far do accidental sampling errors in small populations influence their genetic make-up ? Detailed pedigrees of the population of Tristan da Cunha have been used to give an answer to this question.
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Note on the Computation of Critical Effective Population Sizes

Journal of Computational Biology, 2007
This work extends the work of Whitlock in examining the critical effective population sizes from the fixation of both deleterious and beneficial mutations under drift and selection to prevent mutation breakdown of the population. The validity of approximations for the probability of fixation depends on the nature of the assumed distribution for the ...
Liqing Zhang 0002, Layne T. Watson
openaire   +2 more sources