Systematics and biogeography ofLathyrus(Leguminosae) based on internal transcribed spacer and cpDNA sequence data

• DOI: 10.3732/ajb.92.7.1199
• Publication Date: 2008-02-29T22:42:44Z
• Authors: Gregory J. Kenicer; Tadashi Kajita; R. Toby Pennington; Jin Murata
• Keywords: Monophyly; Holarctic; Vicariance; Lineage (genetic); Molecular Phylogenetics

Lathyrus (Leguminosae; Papilionoideae) is the largest genus in tribe Fabeae and exhibits an intriguing extratropical distribution. We studied systematics biogeography of using sequence data, from accessions representing 53 species, for internal transcribed spacer plus 5.8S-coding region nuclear ribosomal DNA as well trnL-F trnS-G regions chloroplast DNA. Our results generally supported recent morphology-based classifications, resolving clades corresponding to sections Lathyrostylis, but question monophyly large, widespread section Orobus sensu Asmussen Liston. Sections Orobus, Aphaca, Pratensis form a predominantly northern Eurasian-New World clade. Within this clade, North American eastern Eurasian including both Holarctic species (L. palustris L. japonicus), transberingian clade relatively origin diversification. The South Notolathyrus group distant lineage should be reinstated distinct within reached New most probably through long-distance dispersal Eurasia. remaining are centered on Mediterranean region.