Genetic diversity and local population structure in Ambrosina bassii (Araceae, Ambrosineae), a Mediterranean relict species

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Abstract

The effects of habitat fragmentation on the genetic structure of Ambrosina bassii are analyzed. The species, whose reproductive biology is mostly unknown, is the only representative of its genus and tribe and it is endemic to the central Mediterranean area. The selected study area was the island of Sicily, in which wild populations show a wide morphological variability and ecological amplitude. Patterns of within- and among-population genetic diversity in eleven Sicilian populations, occurring in six disjunct areas, were examined by means of allozyme electrophoresis. High levels of genetic diversity were found as shown by the mean expected heterozygosity (He = 0.263), the percentage of polymorphic loci (P95=65.3), the mean number of alleles per locus (A = 2.0). Genetic differentiation between populations was relatively low (mean FST= 0.091 and Nm= 1.98). A very weak correlation exists between genetic distances and geographic distances between populations. Despite its restricted and fragmented geographical range, A. bassii showed (i) high levels of genetic diversity, mainly within populations; (ii) no genetic differentiation between populations and morphotypes.
Lingua originaleEnglish
pagine (da-a)737-746
Numero di pagine10
RivistaBiochemical Systematics and Ecology
Volume37
Stato di pubblicazionePublished - 2009

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Araceae
relict species
Electrophoresis
Isoenzymes
population structure
genetic differentiation
genetic variation
Population
habitat fragmentation
reproductive biology
morphotype
allozyme
wild population
heterozygosity
genetic structure
population genetics
electrokinesis
allele
Sicily
loci

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

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title = "Genetic diversity and local population structure in Ambrosina bassii (Araceae, Ambrosineae), a Mediterranean relict species",
abstract = "The effects of habitat fragmentation on the genetic structure of Ambrosina bassii are analyzed. The species, whose reproductive biology is mostly unknown, is the only representative of its genus and tribe and it is endemic to the central Mediterranean area. The selected study area was the island of Sicily, in which wild populations show a wide morphological variability and ecological amplitude. Patterns of within- and among-population genetic diversity in eleven Sicilian populations, occurring in six disjunct areas, were examined by means of allozyme electrophoresis. High levels of genetic diversity were found as shown by the mean expected heterozygosity (He = 0.263), the percentage of polymorphic loci (P95=65.3), the mean number of alleles per locus (A = 2.0). Genetic differentiation between populations was relatively low (mean FST= 0.091 and Nm= 1.98). A very weak correlation exists between genetic distances and geographic distances between populations. Despite its restricted and fragmented geographical range, A. bassii showed (i) high levels of genetic diversity, mainly within populations; (ii) no genetic differentiation between populations and morphotypes.",
keywords = "Ambrosina bassii, Araceae, Island Sicily, fragmentation, Disjunct populations, Genetic structure, Allozymes",
author = "Raimondo, {Francesco Maria} and Anna Geraci and Angelo Troia",
year = "2009",
language = "English",
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pages = "737--746",
journal = "Biochemical Systematics and Ecology",
issn = "0305-1978",
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TY - JOUR

T1 - Genetic diversity and local population structure in Ambrosina bassii (Araceae, Ambrosineae), a Mediterranean relict species

AU - Raimondo, Francesco Maria

AU - Geraci, Anna

AU - Troia, Angelo

PY - 2009

Y1 - 2009

N2 - The effects of habitat fragmentation on the genetic structure of Ambrosina bassii are analyzed. The species, whose reproductive biology is mostly unknown, is the only representative of its genus and tribe and it is endemic to the central Mediterranean area. The selected study area was the island of Sicily, in which wild populations show a wide morphological variability and ecological amplitude. Patterns of within- and among-population genetic diversity in eleven Sicilian populations, occurring in six disjunct areas, were examined by means of allozyme electrophoresis. High levels of genetic diversity were found as shown by the mean expected heterozygosity (He = 0.263), the percentage of polymorphic loci (P95=65.3), the mean number of alleles per locus (A = 2.0). Genetic differentiation between populations was relatively low (mean FST= 0.091 and Nm= 1.98). A very weak correlation exists between genetic distances and geographic distances between populations. Despite its restricted and fragmented geographical range, A. bassii showed (i) high levels of genetic diversity, mainly within populations; (ii) no genetic differentiation between populations and morphotypes.

AB - The effects of habitat fragmentation on the genetic structure of Ambrosina bassii are analyzed. The species, whose reproductive biology is mostly unknown, is the only representative of its genus and tribe and it is endemic to the central Mediterranean area. The selected study area was the island of Sicily, in which wild populations show a wide morphological variability and ecological amplitude. Patterns of within- and among-population genetic diversity in eleven Sicilian populations, occurring in six disjunct areas, were examined by means of allozyme electrophoresis. High levels of genetic diversity were found as shown by the mean expected heterozygosity (He = 0.263), the percentage of polymorphic loci (P95=65.3), the mean number of alleles per locus (A = 2.0). Genetic differentiation between populations was relatively low (mean FST= 0.091 and Nm= 1.98). A very weak correlation exists between genetic distances and geographic distances between populations. Despite its restricted and fragmented geographical range, A. bassii showed (i) high levels of genetic diversity, mainly within populations; (ii) no genetic differentiation between populations and morphotypes.

KW - Ambrosina bassii, Araceae, Island Sicily, fragmentation, Disjunct populations, Genetic structure, Allozymes

UR - http://hdl.handle.net/10447/44639

M3 - Article

VL - 37

SP - 737

EP - 746

JO - Biochemical Systematics and Ecology

JF - Biochemical Systematics and Ecology

SN - 0305-1978

ER -