Molecular phylogenetic evidence for the geographic origin and classification of Canary Island Lotus (Fabaceae: Loteae)
Molecular phylogenetic analyses of Macaronesian Lotus and related genera were conducted to assess their biogeographic history and taxonomy. Macaronesian Lotus, which are typically classified within one of two subgenera, Lotus subgenus Pedrosia or L. subg. Rhyncholotus, are diagnosed by the presence...
Saved in:
Published in | Molecular phylogenetics and evolution Vol. 32; no. 1; pp. 123 - 138 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier Inc
01.07.2004
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Molecular phylogenetic analyses of Macaronesian
Lotus and related genera were conducted to assess their biogeographic history and taxonomy. Macaronesian
Lotus, which are typically classified within one of two subgenera,
Lotus subgenus
Pedrosia or
L. subg.
Rhyncholotus, are diagnosed by the presence of a forked or toothed style and differences in corolla morphology. Maximum parsimony and Bayesian analyses of internal transcribed spacer sequences identify a well-supported northwest African-Cape Verde Island clade that includes all members of
Lotus subgenus
Pedrosia
+
L. subg.
Rhyncholotus. There is modest support for two independently nested clades containing the Canary Island species and two non-Canarian species,
Lotus assakensis from Africa and
Lotus azoricus endemic to the Azores. Biogeographic reconstruction based on a parsimony topology unequivocally identifies an African origin for the Canary Island group with subsequent back dispersal to the African continent and a single dispersal event to the Azores. A phylogeographic assessment of colonization and diversification patterns suggests that geographic isolation via interisland colonization of ecologically similar habitats is the primary mode of species diversification in Canary Island
Lotus. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 1055-7903 1095-9513 |
DOI: | 10.1016/j.ympev.2003.11.018 |