SELECTION AND INBREEDING DEPRESSION: EFFECTS OF INBREEDING RATE AND INBREEDING ENVIRONMENT

@inproceedings{Swindell2006SELECTIONAI,
  title={SELECTION AND INBREEDING DEPRESSION: EFFECTS OF INBREEDING RATE AND INBREEDING ENVIRONMENT},
  author={W. Swindell and J. L. Bouzat},
  year={2006}
}
Abstract The magnitude of inbreeding depression in small populations may depend on the effectiveness with which natural selection purges deleterious recessive alleles from populations during inbreeding. The effectiveness of this purging process, however, may be influenced by the rate of inbreeding and the environment in which inbreeding occurs. Although some experimental studies have examined these factors individually, no study has examined their joint effect or potential interaction. In the… Expand
Genetic variability and structure of jaguar (Panthera onca) in Mexican zoos
TLDR
The importance of maintaining an adequate level of genetic variation is emphasised and the implementation of standardised studbooks for jaguars in Mexico is proposed to avoid inbreeding and provide a population genetic characterisation that could serve as a basis for ex situ conservation programmes. Expand
Analysis of the effects of inbreeding on lifespan and starvation resistance in Drosophila melanogaster
TLDR
It is found that inbreeding reduced lifespan but had no effect on starvation resistance, which indicates highly trait specific consequences of inbreeding. Expand
Slow inbred lines of Drosophila melanogaster express as much inbreeding depression as fast inbred lines under semi-natural conditions
TLDR
The results show that contrary to expectations the slow inbred lines do not maintain higher average fitness than the fast inbreeding lines, and illustrate that although selection may be more efficient with slower rates of inbreeding this does not necessary lead to less inbreeding depression. Expand
Fitness costs associated with low genetic variation are reduced in a harsher environment in amphibian island populations
TLDR
It is suggested that natural thermal stress may mask fitness losses associated with low genetic variation in populations with strong population genetic structure and large variation in the amount of within-population genetic variation. Expand
Trait specific consequences of fast and slow inbreeding: lessons from captive populations of Drosophila melanogaster
TLDR
The effect of inbreeding and inbreeding rate in traits associated with fitness including heat, cold and desiccation stress resistance, egg-to-adult viability, development time, productivity, metabolic rate and wet weight under laboratory conditions was investigated. Expand
The influence of developmental diet on reproduction and metabolism in Drosophila
TLDR
The findings suggest that the observed differences in the adult physiology induced by early-life diet likely result from inevitable and general effects of nutrition on the development of reproductive and metabolic organs, rather than from adaptive mechanisms. Expand
Inbreeding depression in line 1 Hereford cattle population using pedigree and genomic information.
TLDR
Despite the high level of inbreeding in this study, its negative impact on growth performance was not as severe as expected, which may be attributed to the purging of the deleterious alleles due to natural or artificial selection over time. Expand
Analysis of mating system and genetic structure in the endangered, amphicarpic plant, Lewton’s polygala (Polygala lewtonii)
Polygala lewtonii is a federally endangered, amphicarpic plant with a mixed mating system and three types of flowers: (1) aboveground, chasmogamous flowers (i.e., open-pollinated; CH), (2)Expand
Protein kinase Cδ upregulation in microglia drives neuroinflammatory responses and dopaminergic neurodegeneration in experimental models of Parkinson's disease
TLDR
This study systematically investigated whether PKCδ contributes to the heightened microglial activation response following exposure to major proinflammatory stressors, including α-synuclein, tumor necrosis factor α (TNFα), and lipopolysaccharide (LPS). Expand
Inbreeding depression and purging in a haplodiploid: gender-related effects
TLDR
The hypothesis that, in haplodiploids inbreeding effects and genetic variation due to deleterious recessive alleles may depend on gender is supported. Expand
...
1
2
...

References

SHOWING 1-10 OF 23 REFERENCES
Effect of rate of inbreeding on inbreeding depression in Drosophila melanogaster
SummaryThis experiment was designed to study the relationship between rate of inbreeding and observed inbreeding depression of larval viability, adult fecundity and cold shock mortality in DrosophilaExpand
Intraspecific competition disadvantages inbred natterjack toad (Bufo calamita) genotypes over outbred ones in a shared pond environment
TLDR
The viabilities of natterjack toad Bufo calamita embryos and larvae from inbred and outbred populations and the significance of inbreeding with relatively cryptic effects, such as reduction in amphibian larval growth rate, is discussed with respect to population viability. Expand
Relationship between Population Size and Fitness
TLDR
This approach to estimating minimum viable population size provides estimates that are in general agreement with those from numerous other studies and strengthens the argument that conservation efforts should ultimately aim at maintaining populations of several thousand individuals to ensure long-term persistence. Expand
Heterosis × nutrition interaction in Drosophila melanogaster
TLDR
The relationship between heterozygosity and the expression of heterosis at two different nutrition levels was investigated using Drosophila melanogaster and a reasonable fit was given in most cases. Expand
Inbreeding and extinction: The effect of environmental stress and lineage
TLDR
Wild populations are more vulnerable to inbreeding than indicated by extrapolation from captive environments, and under inbreeding, extinction rates were significantly higher in all three stressful environments compared with the benign environment. Expand
Most species are not driven to extinction before genetic factors impact them.
TLDR
Differences in heterozygosity indicate lowered evolutionary potential, compromised reproductive fitness, and elevated extinction risk in the wild in threatened species. Expand
Quantitative genetic variation in an island population of the speckled wood butterfly (Pararge aegeria)
TLDR
Analysis of quantitative genetic variation for the Speckled Wood butterfly Pararge aegeria on the island of Madeira finds that the population seems resistant to inbreeding effects, which may be the result of purging of deleterious alleles. Expand
Temperature dependent larval resource allocation shaping adult body size in Drosophila melanogaster
TLDR
The data presented here offer an explanation of geographical variation in body size by showing that thermal evolution of resource allocation, specifically the ability to access glycogen storage, is the proximate mechanism responsible for the life‐history trade‐off between larval survival and adult size. Expand
Inbreeding effects in wild populations.
TLDR
This work reveals that levels of inbreeding depression vary across taxa, populations and environments, but are usually substantial enough to affect both individual and population performance. Expand
Effects of population structures and selection strategies on the purging of inbreeding depression due to deleterious mutations.
  • J. Wang
  • Medicine, Biology
  • Genetical research
  • 2000
TLDR
Compromising between the effectiveness of purging, and the risk of extinction and inbreeding coefficient, the breeding scheme with equal within- and between-line selection and crossing alternatively with full-sib mating is generally the most desirable scheme for purging deleterious mutations. Expand
...
1
2
3
...