Fluctuating selection
WebFeb 16, 2024 · Indeed, strong but fluctuating selection can generate a pattern of little change when averaged over longer time periods . Field studies that measure patterns of evolution over many years or decades are somewhat intermediate between immediate and geologic time scales and thus have the potential to illuminate how short-term selection … WebAug 30, 2024 · Specifically, fluctuating selection dynamics required high costs of infection to the hosts (C A > 0.6, depending on parasite fecundity) that induce strong parasite-mediated selection. However, very high costs led to host population dynamics that were mainly driven by temporal extinctions of the host and parasite genotypes.
Fluctuating selection
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WebUsing long-term individual-based data for a wild rodent population, we quantify the magnitude of fluctuating selection on body size. Subsequently, we estimate the … WebApr 12, 2024 · Plant pathogens are constantly evolving and adapting to their environment, including their host. Virulence alleles emerge, and then increase, and sometimes decrease in frequency within pathogen populations in response to the fluctuating selection pressures imposed by the deployment of resistance genes. In some cases, these strong …
WebJul 18, 2024 · Fluctuating selection: when the strength and/or direction of selection shifts over time. Frequency-dependent selection: wherefitness depends onthefrequency. the … WebTang & Huang - Fluctuating selection on floral colour 845 used followed by Tukey- Kramer' s tests to analyse the effects of pollination treatments, gynoecium colour and water level on seed production. A two-way ANOVA was performed to test variation in seed production of open-pollinated flowers with year and morph as factors.
WebJan 7, 2015 · The consequences of host-parasite coevolution are highly contingent on the qualitative coevolutionary dynamics: whether selection fluctuates (fluctuating selection … WebAug 2, 2024 · To compare the intensity of selection in fluctuating environment and its range of changes endured by our simulated populations fixing sexual and clonal …
Fluctuating selection is a mode of natural selection characterized by the fluctuation of the direction of selection on a given phenotype over a relatively brief period of evolutionary time. For example, a species of plant may come in two varieties: one which prefers wetter soil and one which prefers … See more The Red Queen hypothesis describes coevolutionary 'arms races' between antagonistic species (predators and prey, parasites and hosts, competitors with overlapping niches), emphasizing competition … See more • Frequency-dependent selection • Directional selection • Balancing selection See more
WebOct 1, 2008 · Using a perturbation method for processes with multiple time scales, we show that as the number of demes tends to infinity, the overall frequency converges to a … cib bufferWebMar 1, 2024 · Fluctuating selection must be strong to maintain a balanced polymorphism. The symmetric fluctuating selection model needs s > 2 / N and the random selection model needs σ α 1 − ρ α > 1 / N . Although the intensity of selection declines as the square root of the population size, we still need s > 0.0014 or σ α 1 − ρ α > 0.001 in a ... dgccrf shampooingWebDue to the particularity of the site selection of hydropower stations, the canyon wind with large fluctuations often occurs during the construction of the hydropower station, which will seriously affect the safety of construction personnel. Especially in the early stage of the construction of the hydropower station, the historical data and information on the canyon … cib business online hot lineWebAug 9, 2024 · In this Review, we explore our current knowledge of the composition and dynamics of phage communities in natural environments (for example, soil, ocean and the mammalian gut) based on the latest... cibby danyla photosWebDec 7, 2024 · Therefore, if fluctuating selection is responsible for maintaining both LLS and HLS-1 alleles of HKT1;1 at our mixed demes, then one possible agent of selection … cib businessesWebJul 1, 2011 · Fluctuating selection is likely in situations where host immune and phage infectivity phenotypes match up in a one-to-one "lock and key" type manner (Agrawal and Lively, 2002), and there is ... cib bracket 2023WebAug 1, 2014 · Increases in resistance and infectivity would be indicative of arms race dynamics, while nondirectional changes would be indicative of fluctuating selection dynamics (Lopez Pascua et al., 2014 ... cibc 1550 upper james hamilton