Abstract

The present investigation investigated the genetic structure of a monophyletic group of endemic species belongingto the Genista ephedroides species group: G. bocchierii, G. cilentina, G. demarcoi, G. dorycnifolia, G. ephedroides,G. gasparrinii, G. insularis, G. numidica, G. tyrrhena subsp. tyrrhena, G. tyrrhena subsp. pontiana and G. valsecchiae,all distributed in the western Mediterranean. Using seven plastid microsatellites, 16 populations (288individuals) were screened. Haplotype fixation was observed in particular for most of the Tyrrhenian taxa (i.e.G. bocchierii, G. cilentina, G. demarcoi, G. ephedroides, G. gasparrinii, G. insularis, G. tyrrhena subsp. tyrrhena andG. valsecchiae). However, although genetic diversity within populations was low [(hS = 0.132 (± 0.056)], a high levelof total plastid DNA diversity [hT = 0.866 (± 0.042)] was detected, and analysis of molecular variance indicated thatvariation is almost exclusively expressed among populations (95.25%). The plastid microsatellites identify two groupsof taxa, one including Sardinian taxa and populations of G. tyrrhena subsp. pontiana and the other including twosubgroups, one of which includes Sicilian/Aeolian elements and the other with G. numidica/G. cilentina andG. dorycnifolia. Results allow us to consider G. cilentina as originating by recent anthropogenic dispersal andG. tyrrhena subsp. pontiana as a possible stabilized hybrid between local plants and members of the Sardinian groupcontributing the maternal lineage. The evolutionary history of the group possibly results from the effects of ancientevents fostering geodispersal and range contraction, followed by more recent long-range dispersal or geodispersionover Pleistocenic land bridges.

Autore Pugliese

• Vendramin Giovanni Giuseppe

Tutti gli autori

• O. DE CASTRO; E. VÉLA; G.G. VENDRAMIN; R. GARGIULO; P. CAPUTO

Titolo volume/Rivista

Botanical journal of the Linnean Society

Anno di pubblicazione

2015

ISSN

1095-8339

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile