Inbreeding and Outbreeding Depression in Natural Populations of Chamaecrista fasciculata (Fabaceae)

@article{Fenster2000InbreedingAO,
  title={Inbreeding and Outbreeding Depression in Natural Populations of Chamaecrista fasciculata (Fabaceae)},
  author={Charles B. Fenster and Laura F. Galloway},
  journal={Conservation Biology},
  year={2000},
  volume={14}
}
Abstract: The deleterious consequences of inbreeding have been well documented. There are, however, few empirical studies that have examined the consequences of restoring heterozygosity and hence the fitness of inbred populations by conducting interpopulation crosses and measuring the performance of later‐generation hybrids under field conditions. We conducted interpopulation crosses of 100 m to 2000 km, which spans the range of Chamaecrista fasciculata ( Fabaceae) in eastern North America. We… 

Figures and Tables from this paper

Demographic consequences of inbreeding and outbreeding in Arnica montana: a field experiment

The observed higher survival of seedlings as compared with seeds suggests that it is better to plant individuals than to sow, and significant differences among populations for all measured fitness components suggest that reinforcement is best achieved using material from several populations.

Effects of inbreeding and interpopulation crosses on performance and plasticity of two generations of offspring of a declining grassland plant.

Investigation of the effects of selfing and of within and between population crosses on reproduction and the performance of two generations of offspring of the declining grassland plant Saxifraga granulata finds continuous inbreeding may drastically reduce the fitness of plants, but effects may be environment-dependent.

POPULATION DIFFERENTIATION IN THE BEETLE TRIBOLIUM CASTANEUM. I. GENETIC ARCHITECTURE

The view that genetic incompatibilities responsible for postzygotic isolation, an important component of speciation, may be a natural but serendipitous consequence of nonadditive genetic effects and structured populations is supported.

Outbreeding effects in an inbreeding insect, Cimex lectularius

It was found that outbreeding led to increased starvation resistance compared to inbred families, but this benefit was lost after two generations of outbreeding, and the consequences of these results are discussed.

Effects of crossing distance on performance of the native wildflower Lobelia siphilitica: Implications for ecological restoration1

Mixed support for the recommendation that restoration projects use seed collected from geographically proximate populations is found, and factors other than geographic distance, particularly climatic distance, need to be considered when selecting seed sources for ecological restoration projects.

Inbreeding depression and heterosis vary in space and time in the serpentinophyte perennial Minuartia smejkalii

A conservation approach is recommended in which between-population outbred plants are introduced into very small populations to maximise the benefits of heterosis in M. smejkalii, an endemic serpentinophyte perennial of limited size.

The consequences of mating over a range of parental genetic similarity in a selfing allopolyploid plant species

The F1 fitness consequences of mating over a range of (genetic) distances in the allohexaploid plant species Geum urbanum support low, if any, inbreeding depression and heterosis and attribute this to the peculiar state of quasi‐permanent heterozygosity in allopolyploids and frequent selfing.

Using mimulus as a model system to understand the role of inbreeding in conservation: Genetic and ecological approaches

The science and practice of conservation biology will benefit greatly by considering the potential interactions between inbreeding and phenotypic plasticity and their effects in the establishment and persistence of small populations.

Effects of outcrossing in fragmented populations of the primarily selfing forest herb Geum urbanum

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.
...

References

SHOWING 1-10 OF 37 REFERENCES

GENE FLOW IN CHAMAECRISTA FASCICULATA (LEGUMINOSAE) II. GENE ESTABLISHMENT

  • C. Fenster
  • Biology
    Evolution; international journal of organic evolution
  • 1991
It is likely that genetic drift plays a major role in determining the distribution of genetic variation in this population of the annual legume Chamaecrista fasciculata.

POPULATION DIFFERENTIATION IN AN ANNUAL LEGUME: GENETIC ARCHITECTURE

This study used a quantitative genetic design to quantify the contribution of epistasis to population divergence for fitness components of a native annual legume, Chamaecrista fasciculata, and concludes that the epistasis documented in this study reflects interactions among linked loci.

POPULATION DIFFERENTIATION IN AN ANNUAL LEGUME: LOCAL ADAPTATION

  • L. GallowayC. Fenster
  • Environmental Science, Biology
    Evolution; international journal of organic evolution
  • 2000
It is suggested that metapopulation processes and temporal environmental variation act together to reduce local adaptation, except over long distances, in the annual legume Chamaecrista fasciculata.

Hybrid Origins of Plant Species

Experimental, theoretical, and empirical studies of homoploid hybrid speciation suggest that it is feasible, although evolutionary conditions are stringent, and hybridization may be important as a stimulus for the genetic or chromosomal reorganization envisioned in founder effect and saltational models of speciation.

RELATIVE FITNESS OF SELFED AND OUTCROSSED PROGENY IN A SELF‐COMPATIBLE, PROTANDROUS SPECIES, SABATIA ANGULARIS L. (GENTIANACEAE): A COMPARISON IN THREE ENVIRONMENTS

  • M. R. Dudash
  • Environmental Science
    Evolution; international journal of organic evolution
  • 1990
The consequences of selfing were examined for a population of self‐compatible, protandrous, Sabatia angularis L., suggesting that inbreeding depression in S. angularis is strong enough to maintain outcrossing in the study population.

THE GENETIC INTERPRETATION OF INBREEDING DEPRESSION AND OUTBREEDING DEPRESSION

  • M. Lynch
  • Biology
    Evolution; international journal of organic evolution
  • 1991
A general expression is presented for the expected phenotype of an individual under the joint influence of inbreeding and crossbreeding, a simple function of the inbreeding coefficient, of source and hybridity indices ofCrossbreeding, and of specific forms of gene action.

Environmental Dependency of Inbreeding Depression: Implications for Conservation Biology

It is found that the rank fitness order of lineages differs between environments; lineages of high fitness in one environment may have low fitness in another environment; this change in rank is evident in a significant genotype-by-environment interaction for inbreeding depression for both females and males.

THE EFFECT OF NUCLEAR AND CYTOPLASMIC GENES ON FITNESS AND LOCAL ADAPTATION IN AN ANNUAL LEGUME, CHAMAECRISTA FASCICULATA

The contribution of nuclear and cytoplasmic genes to fitness components varied across sites and years, suggesting that experiments should be replicated and conducted under natural conditions to understand the influence of these genomes and their interactions to population differentiation.

GENE FLOW IN CHAMAECRISTA FASCICULATA (LEGUMINOSAE) I. GENE DISPERSAL

  • C. Fenster
  • Environmental Science
    Evolution; international journal of organic evolution
  • 1991
Both pollen and seed dispersal components of gene flow were examined in the annual plant Chamaecrista fasciculata (Leguminosae) and quantified in terms of Wright's neighborhood area to determine whether pollinations should be weighted differentially across the flowering season.

Mirror image flowers and their effect on outcrossing rate in Chamaecrista fasciculata (Leguminosae)

The results suggest that the contribution of enantiostyly to selfing is minimal and may be reduced if pollinators discriminate among the floral types.