c8.12.10 – Phylogeography and conservation perspectives of an endangered macaronesian endemic: Picconia azorica (Tutin) Knobl. (Oleaceae)

Fineschi S*, Ferreira R, Bagnoli F, Simeone MC

Collocazione: c8.12.10 – Tipo Comunicazione: Poster
8° Congresso SISEF *
Sessione 12: “Poster” *

Contatto: Silvia Fineschi (s.fineschi@ipp.cnr.it)

Abstract: Picconia azorica is an endemic species of the Azorean archipelago. In this work we analysed the genetic diversity of P. azorica and the congeneric species P. excelsa from Canary and Madeira islands. Plastid DNA sequence analysis and molecular markers (RFLP and SSR) were used for this purpose. Phylogenetic data suggest the monophyly of Picconia and support a late Miocene divergence of the two species. Three polymorphic cpSSR loci allowed the identification of five different haplotypes in P. azorica. Uniqueness and relictuality of lineages are presented and discussed. Picconia azorica intra-specific diversity patterns revealed low genetic diversity and a weak genetic structure, which could result from long-lasting ecological stability and efficient interisland seed movement that have been severely affected in recent times. The species survival is at risk, and we suggest management practices focusing on ex situ and in situ conservation units based on eco-genetic data. Additional measures contributing to mild erosion of the gene pool and to remove barriers to seed dispersal are indicated.

Parole chiave: Picconia, Phylogeography, Azores, Phylogeny, Conservation

Citazione: Fineschi S, Ferreira R, Bagnoli F, Simeone MC (2011). Phylogeography and conservation perspectives of an endangered macaronesian endemic: Picconia azorica (Tutin) Knobl. (Oleaceae) . 8° Congresso Nazionale SISEF, Rende (CS), 04 – 07 Ott 2011, Contributo no. #c8.12.10