@ARTICLE{TreeBASE2Ref17016, author = {R. Toby Pennington and Matthew T. Lavin and Helen Ireland and Bente B. Klitgaard and Jill Preston and J-M Hu}, title = {Phylogenetic relationships of basal papilionoid legumes based upon sequences of the chloroplast trnL intron.}, year = {2001}, keywords = {}, doi = {10.1043/0363-6445-26.3.537}, url = {http://www.jstor.org/stable/3093980}, pmid = {}, journal = {Systematic Botany}, volume = {26}, number = {}, pages = {537--556}, abstract = {The Swartzieae, Sophoreae, Dipterygeae, and Dalbergieae are considered the most basal tribes of the subfamily Papilionoideae (Leguminosae). Nucleotide sequences from the chloroplast trnL intron for the majority of genera of the tribes were analyzed cladistically together with placeholder representatives of more derived tribes. Preliminary results indicate radical changes are necessary for papilionoid classification because Swartzieae, Sophoreae, and Dalbergieae are polyphyletic. Their constituent genera are mixed in a series of monophyletic groups, many of which have never been proposed previously, and the relationships amongst which are poorly resolved. Some of these groups, such as the genistoid and dalbergioid clades, are species-rich because they contain major papilionoid radiations. In other cases, putatively basal genera form small clades with no derived taxa included. There is weak evidence that Bogunnia, Swartzia, Cyathostegia, Bocoa, and Atelia (all Swartzieae) may be the sister group to all other papilionoids, and that a large clade is congruent with a 50 kb inversion in the chloroplast large single copy (LSC) region.} }

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