Systematics/Phytogeography / Taxonomie/ Section
Grundmann, Michael , Rumsey, Fred , Squirrell, Jane , Russell, Stephen J. , Ansell, Stephen , Hollingsworth, Pete , Schneider, Harald , Vogel, Johannes C. .
Molecular phylogeny of bluebells, Hyacinthoides (Aspearagaceae).
The genus Hyacinthoides (Hyacinthaceae), closely related to Scilla, consists of nine currently accepted species, distributed across Western Europe and North Africa. Here we provide the first molecular phylogeny that includes all species. Sixty-seven accessions representing seven outgroup taxa and the entire natural distribution range of each Hyacinthoides taxon were analysed using c. 4200 bp of chloroplast DNA sequence, derived from five non-coding regions: atpB-rbcL, psbH-trnH, trnCD, trnG, trnL-trnF. Two well supported clades were recovered by phylogenetic analyses. Clade I comprised three species (H. aristidis, H. lingulata, and H. italica) from North Africa and the Maritime Alps of Italy and France. Clade II comprised six species from Western Europe and North Africa, arranged as two sub-clades, firstly (IIa) grouping H. flahaultiana, H. mauritanica and H. reverchonii, and secondly (IIb) H. cedretorum, H. hispanica, H. paivae, and H. non-scripta. Southern Moroccon specimens of H. flahaultiana are sister to H. reverchonii, which together are sistergroup to Northern Moroccan-Portuguese specimens of H. mauritanica. Within clade IIb, both H. cedretorum and H. paivae are nested within H. hispanica. Taxa within this clade are distinguished by their derived bell-shaped flowers, with the exception of H. paivae, which has reverted to an open-stellate arrangement. Root-tip squashes confirmed the North African H. cedretorum to be a tetraploid (n=32), derived from a widespread lineage of the diploid Iberian H. hispanica. The lack of sequence diversity is compatible with a hypothesis of a single origin of polyploidy. In contrast to the genetically highly structured H. hispanica, H. non-scripta was almost uniform across its range from Northern Spain to Great Britain, a feature supporting a scenario of a Pleistocene bottleneck.
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1 - Natural History Museum, Department of Botany, Cromwell Road, London, SW7 5BD, England
2 - Natural History Museum, Botany, Cromwell Road, London, SW7 5BD, united kingdom
3 - Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh, EH3 5LR, UK
4 - Royal Botanic Garden Edinburgh, 20A Inverleith Road, Edinburgh, EH3 5LR, UK
5 - Natural History Museum, Cromwell Road, London, SW7 5BD, UK
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM