Results 41 to 50 of about 1,499,816 (300)

The effective size of bryophyte populations

Journal of Theoretical Biology, 2009
Bryophytes with their dominant haploid stage conform poorly to the life cycles generally treated in population genetical models. Here we make a detailed analysis of what effective sizes bryophyte model populations have as a function of their breeding system.
Bengtsson, Bengt O., Cronberg, Nils
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Extensions of the Coalescent Effective Population Size [PDF]

Genetics, 2009
Abstract We suggest two extensions of the coalescent effective population size of Sjödin  et al. (2005) and make a third, practical point. First, to bolster its relevance to data and allow comparisons between models, the coalescent effective size should be recast as a kind of mutation effective size.
John, Wakeley, Ori, Sargsyan
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Effective Population Size in a Continuously Distributed Population [PDF]

Evolution, 1995
An individual-based simulation model was created to examine genetic variability, time until fixation and spatial genetic structure in a continuously distributed population. Previous mathematical models for continuously distributed populations have the difficulty that the assumption of independent reproduction and independent dispersal of offspring ...
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Assessing the genetic diversity in small farm animal populations*

Animal, 2011
Genetic variation is vital for the populations to adapt to varying environments and to respond to artificial selection; therefore, any conservation and development scheme should start from assessing the state of variation in the population.
M.A. Toro, T.H.E. Meuwissen, J. Fernández, I. Shaat, A. Mäki-Tanila   +4 more
doaj   +1 more source

POPULATION STRUCTURE AND EFFECTIVE SIZE OF A LIZARD POPULATION [PDF]

Evolution, 1965
Sewall Wright, R. A. Fisher, and others have shown the influence of population size on the fluctuation in gene frequencies but have disagreed on the explanation for it. The ratio of the effective population number to the actual number is a measure of the extent to which parents make unequal contributions to succeeding generations.
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On the Meaning and Existence of an Effective Population Size [PDF]

Genetics, 2005
Abstract We investigate conditions under which a model with stochastic demography or population structure converges to the coalescent with a linear change in timescale. We argue that this is a necessary condition for the existence of a meaningful effective population size.
P, Sjödin, I, Kaj, S, Krone, M, Lascoux, M, Nordborg   +4 more
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Linking individual phenotype to density-dependent population growth: the influence of body size on the population dynamics of malaria vectors [PDF]

, 2011
Understanding the endogenous factors that drive the population dynamics of malaria mosquitoes will facilitate more accurate predictions about vector control effectiveness and our ability to destabilize the growth of either low- or high-density insect ...
Killeen, G.F., Knols, B.G.J., Heather M. Ferguson, Knols, Bart G. J., Dickson W. Lwetoijera, Lwetoijera, D.W., Lwetoijera, Dickson W., Killeen, Gerry, Killeen, Gerry F, Takken, W., Ferguson, Heather M., Ferguson, H.M., Gerry F. Killeen, Lwetoijera, Dickson W, Takken, Willem, Ferguson, H. M., Tanya L. Russell, Lwetoijera, D. W., Knols, Bart G.J., Killeen, Gerry F., Russell, T.L., Russell, Tanya L, Russell, Tanya L., Knols, B. G. J., Bart G. J. Knols, Knols, Bart G J, Willem Takken, Ferguson, Heather M   +27 more
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Population genomics of American mink using genotype data

Frontiers in Genetics, 2023
Understanding the genetic structure of the target population is critically important to develop an efficient genomic selection program in domestic animals.
Guoyu Hu, Duy Ngoc Do, Ghader Manafiazar, Alyson A. Kelvin, Mehdi Sargolzaei, Mehdi Sargolzaei, Graham Plastow, Zhiquan Wang, Younes Miar   +8 more
doaj   +1 more source

Variance effective population size is affected by census size in sub‐structured populations

Molecular Ecology Resources, 2023
AbstractMeasurement of allele frequency shifts between temporally spaced samples has long been used for assessment of effective population size (Ne), and this ‘temporal method’ provides estimates of Ne referred to as variance effective size (NeV). We show that NeV of a local population that belongs to a sub‐structured population (a metapopulation) is ...
Nils Ryman, Linda Laikre, Ola Hössjer
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Effective Population Size and Population Subdivision in Demographically Structured Populations [PDF]

Genetics, 2002
Abstract A fast-timescale approximation is applied to the coalescent process in a single population, which is demographically structured by sex and/or age. This provides a general expression for the probability that a pair of alleles sampled from the population coalesce in the previous time interval.
Valérie, Laporte, Brian, Charlesworth
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