Compared to the role of genetic drift, gene flow has a greater influence on the genetic diversity of both species examined. The elevated gene‐flow levels generally increase the genetic diversity in S. marmorata, whereas no obvious trend is evident across the various degrees of gene flow in H...
Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population, the population violates the Hardy-Weinberg assumptions, and evolution occurs. The Hardy-Weinberg Theorem thus...
Although many studies confirm long-term small isolated populations (e.g. island endemics) commonly sustain low neutral genetic variation as a result of genetic drift, it is less clear how selection on adaptive or detrimental genes interplay with random forces. We investigated sequence variation at ...
A factor that drives genetic change, including genetic drift, mutation, gene flow and natural selection. Fitness landscape The relationship of genotype and reproductive success. Often depicted in three dimensional space, in which the X and Y axes are the coordinates that describe all possible genetic...
This would result in a higher probability of genetic drift in the parasite gene pools and, as a consequence, a decrease in their genetic polymorphism. This study is a first attempt to estimate the biodiversity of anisakid parasites at both species and gene level, in an Antarctic ecosystem over...
But genetic diversity and adaptive variants held in marginal populations may be lost (1) when gene flow to environmentally central areas is impeded, (2) when genetic drift strongly affects populations with small effective population sizes or (3) if the populations go extinct as climate extremes ...
detected genetic differentiation originates from genetic drift, followed by the absence of inter-population gene flow, rather than solely natural selection. Overall, the results implicate that connectivity among populations might have been maximal during the glaciation periods and interrupted in the post-...
genetic drift, and thus an overall reduced fitness10. Issues related to small population size are of significant concern for large carnivores, which typically have far-ranging behavior and require extensive habitat connectivity to maintain viable populations11. Large carnivores naturally occur at lower ...
Small population sizes can accelerate local extinction risk owing to genetic drift and inbreeding depression effects [4]. This study measured Ne for the CP and GP populations; however, it could not be measured for the JC, PC, HC, and PHC populations. This is because the population size is ...
of buckwheat species also provides an idea about the various interactive processes including its long-term evolutionary history (changes in distribution pattern, habitat isolation, species variation and population structure) in addition to mating strategy, mutation, genetic drift, selection and gene flow....