Inbreeding depression and low between-population heterosis in recently diverged experimental populations of a selfing species
It is concluded that relatively large population effective sizes prevented fixation of a high genetic load and that local adaptation was limited in these recently diverged populations and that the use of neutral markers should be complemented with information about the presence of local adaptation in the subdivided population.
Loss of genetic diversity and increased embryonic mortality in non‐native lizard populations
- BiologyMolecular ecology
Loss of genetic diversity was accompanied by higher embryonic mortality in non‐native populations, suggesting that introduced populations are sufficiently inbred to jeopardize long‐term viability, but there was no statistical correlation between population‐level genetic diversity and average embryonic mortality.
Population history and the differential consequences of inbreeding and outcrossing in a plant metapoplation
The findings show that isolation and historical variation in population size likely contribute substantial variation in past inbreeding and the consequences of future inbreeding across the metapopulation of the plant Silene latifolia.
Inbreeding, heterozygosity and fitness in a reintroduced population of endangered African wild dogs (Lycaon pictus)
- Biology, Environmental ScienceConservation Genetics
Findings within the sample population indicated that molecular metrics were not robust predictors in models of fitness based on breeding pack formation, dominance, reproductive success or lifespan of individuals, suggesting some deleterious effects of inbreeding.
Effects of outcrossing in fragmented populations of the primarily selfing forest herb Geum urbanum
- Environmental ScienceEvolutionary Ecology
Frequent selfing is expected to purge (sub)lethal alleles and mitigate inbreeding depression, at least if the load of mildly deleterious mutations has not accumulated through genetic drift in populations with a small effective size.
Inbreeding and population dynamics: implications for conservation strategies
- Biology, Environmental Science
The study by Reed, Nicholas & Stratton (2007) focuses on whether inbreeding levels, within several populations of wolf spiders that differ in life history, negatively impact population dynamics and increase the risk of extinction.
A Threefold Genetic Allee Effect
- Biology, Environmental ScienceGenetics
It is concluded that self-incompatibility systems do not necessarily prevent small populations from suffering from inbreeding depression and drift load and may exacerbate the challenge of finding suitable mates.
Trapped in the extinction vortex? Strong genetic effects in a declining vertebrate population
- BiologyBMC Evolutionary Biology
The results demonstrate strong genetic effects in a rapidly declining population, emphasizing the importance of genetic factors for the persistence of small populations.
Biological Sciences: Population Biology Consistent scaling of inbreeding depression in space and time
It was discovered that inbred individuals had lower survival probabilities and produced fewer recruiting offspring than non-inbred individuals and inbreeding depression, measured as the decline in fitness related traits per unit inbreeding, did not vary appreciably among populations or with time.
Genomic and fitness consequences of inbreeding in an endangered carnivore
- BiologyMolecular ecology
The results have implications in conservation biology as they demonstrate that inbreeding depression can effectively be detected in the wild by a genomic approach and demonstrate the important link between genetic variation and fitness as well as the transient nature of genetic rescue.
SHOWING 1-10 OF 142 REFERENCES
Do Plant Populations Purge Their Genetic Load? Effects of Population Size and Mating History on Inbreeding Depression
Regression analyses suggest that purging is most likely to ameliorate ID for early traits, but these declines are typically modest (5–10%).
Inbreeding Depression and Genetic Rescue in a Plant Metapopulation
- Biology, Environmental ScienceThe American Naturalist
It is suggested that population connectivity through pollen‐mediated gene flow may have substantial effects on the persistence of isolated colonies and on the spatial structure of a metapopulation in general.
INBREEDING DEPRESSION IN CONSERVATION BIOLOGY
- Environmental Science, Biology
In three recent cases, introductions into populations with low fitness appeared to restore fitness to levels similar to those before the effects of genetic drift, and the Speke's ...
Inbreeding and extinction in a butterfly metapopulation
- Environmental Science, BiologyNature
The effect of inbreeding on local extinction in a large metapopulation of the Glanville fritillary butterfly is studied and it is found that extinction risk increased significantly with decreasing heterozygosity, an indication of inmarriage.
Inbreeding depression influences lifetime breeding success in a wild population of red deer (Cervus elaphus)
- Environmental Science, BiologyProceedings of the Royal Society of London. Series B: Biological Sciences
It is shown that heterozygosity is positively associated with male and female adult LBS in a wild population of red deer on the Isle of Rum, Scotland, the first time that inbreeding depression and/or heterosis have been detected for a trait highly correlated with overall fitness in both sexes in aWild population.
Selection against inbred song sparrows during a natural population bottleneck
- Biology, Environmental ScienceNature
It is reported that song sparrows that survived a severe population bottleneck were a non-random subset of the pre-crash population with respect to inbreeding, and that natural selection favoured outbred individuals, suggesting that inbreeding depression was expressed in the face of an environmental challenge.
Microsatellite heterozygosity, fitness and demography in natterjack toads Bufo calamita
Investigation of variation in the number of tandem dinucleotide repeats at eight polymorphic microsatellite loci in 38 natterjack toad, Bufo calamita, populations that varied in census size, degree of isolation and distance from the distributional range edge indicated that larval growth rates were positively and strongly correlated with expected heterozygosity across the micros satellite loci.
EFFECTS OF DIFFERENT LEVELS OF INBREEDING ON PROGENY FITNESS IN PLANTAGO CORONOPUS
- Biology, MedicineEvolution; international journal of organic evolution
The results were consistent with the view that mutation to mildly deleterious alleles is the primary cause of inbreeding depression, and evidence for synergistic epistasis was detected for the probability of flowering, but not for total seed production.
Immigration and the ephemerality of a natural population bottleneck: evidence from molecular markers
- BiologyProceedings of the Royal Society of London. Series B: Biological Sciences
Results show that immigration at levels that are hard to measure in most field studies can lead to qualitatively very different genetic outcomes from those expected from mutations only, and suggest that future theoretical and empirical work on bottlenecks and metapopulations should address the impact of immigration.
Does inbreeding affect the extinction risk of small populations?: predictions from Drosophila
- Biology, Environmental Science
It is shown that inbred populations have a significantly higher short‐term probability of extinction than non‐inbred populations, even for low levels of inbreeding, and that the extinction probability increases with increasing inbreeding levels.