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

Risultato della ricerca: Article

9 Citazioni (Scopus)

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

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

Cita questo