Abstract
Microgeographic genetic variation in populations of a wetland macrophyte, Hibiscus moscheutos L. (Malvaceae), was investigated using allozyme polymorphism. The species is a self-compatible insect-pollinated perennial, and seeds are water dispersed (hydrochory). Six hundred plants were analyzed from eight brackish and two freshwater populations within the Rhode River watershed/estuarine system. The genetic structure of the populations was assessed by fixation indices and spatial autocorrelation analyses. The degree of genetic differentiation among sites and gene flow between all paired combinations of sites (M ) was analyzed using three hypothetical gene flow models. Fixation indices indicated almost complete panmixia within populations, and spatial autocorrelations showed that genotypes were randomly distributed within sites, most likely the result of water dispersal of seeds. Allele frequencies were significantly different among sites, and estimated FST indicated moderate genetic differentiation (_ = 0.062). Genetic differences between populations were mostly explained by a gene flow model that accounted for the location of populations relative to the tidal stream. The importance of hydrochory in affecting spatial genetic structure was thus suggested both within and among H. moscheutos populations.
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Claims 6
Claim · model-written summary
Fixation indices indicated almost complete panmixia within Hibiscus populations.
- Taxon
- Hibiscus moscheutos
_Hibiscus_moscheutos_-_Red_swamp_rose-mallow_flower_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=60)
Muenchhusia moscheutost0 - Outcome
- almost complete panmixia within populationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Hibiscus_moscheutos_-_Red_swamp_rose-mallow_flower_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=500)
Verbatim
e0“Fixation indices indicated almost complete panmixia within populations”
t0“Hibiscus moscheutos”
Claim · model-written summary
Genotypes were randomly distributed within Hibiscus sites.
- Taxon
- Hibiscus moscheutosMuenchhusia moscheutost0
- Outcome
- genotypes were randomly distributed within sitese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spatial autocorrelations showed that genotypes were randomly distributed within sites”
t0“Hibiscus moscheutos”
Claim · model-written summary
Allele frequencies differed significantly among Hibiscus sites.
- Taxon
- Hibiscus moscheutosMuenchhusia moscheutost0
- Outcome
- Allele frequenciese0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Allele frequencies were significantly different among sites”
t0“Hibiscus moscheutos”
Claim · model-written summary
Estimated FST indicated moderate genetic differentiation of 0.062.
- Taxon
- Hibiscus moscheutosMuenchhusia moscheutost0
- Outcome
- moderate genetic differentiatione0
- Value
- 0.062e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“estimated FST indicated moderate genetic differentiation (_ = 0.062)”
t0“Hibiscus moscheutos”
Claim · model-written summary
A gene flow model accounting for tidal stream location explained most genetic differences among populations.
- Taxon
- Hibiscus moscheutosMuenchhusia moscheutost0
- Outcome
- Genetic differences between populationse0
- Comparator
- location of populations relative to the tidal streame0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic differences between populations were mostly explained by a gene flow model that accounted for the location of populations relative to the tidal stream.”
t0“Hibiscus moscheutos”
Claim · model-written summary
The authors suggested water dispersal affects spatial genetic structure within and among Hibiscus populations.
- Taxon
- H. moscheutosMuenchhusia moscheutose0
- Outcome
- spatial genetic structuree0
- Qualifier
- hydrochorye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The importance of hydrochory in affecting spatial genetic structure was thus suggested both within and among H. moscheutos populations.”