TreeBASE Search-Matrices for study 14891

@ARTICLE{TreeBASE2Ref22525, author = {Siddharthan Surveswaran and Mei Sun and Guido Grimm and Sigrid Liede-Schumann}, title = {On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera}, year = {2014}, keywords = {: Asclepiadoideae, classification, Chloroplast DNA, India, phylogeny, rbcL, rps16, systematics, trnL, trnL-F}, doi = {}, url = {http://}, pmid = {}, journal = {Botanical Journal of the Linnean Society}, volume = {174}, number = {}, pages = {601?619}, abstract = {Phylogenetic structure of Asclepiadoideae (Apocynaceae) has been elucidated at the tribal and subtribal levels in the last two decades. However, to date the systematic positions of seven Asian genera, Cosmostigma, Graphistemma, Holostemma, Pentasachme, Raphistemma, Seshagiria, and Treutlera have not been investigated. In this study, we examine evolutionary relationships among these seven small enigmatic Asian genera and clarify their positions in the known phylogeny of Asclepiadoideae, using a combination of plastid sequences of rbcL, rps16, trnL and trnL-F regions. Cosmostigma and Treutlera are resolved as members of the non-Hoya clade of Marsdenieae (maximum parsimony bootstrap support value BSMP = 96, maximum likelihood bootstrap support value BSML = 98, Bayesian-inferred posterior probability PP = 1.0), Pentasachme as sister of Stapeliinae in Ceropegieae (BSMP = 64, BSML = 66, PP = 0.94). Graphistemma, Holostemma, Raphistemma, and Seshagiria all belong to the Asclepiadeae-Cynanchinae (BSMP = 97, BSML = 100, PP = 1.0). The study confirms the generally accepted tribal and subtribal structure of the subfamily. One exception is Eustegia minuta, which is here placed as sister to all Asclepiadeae (BSMP = 58, BSML = 76, PP = 0.99) and not as sister to (Marsdenieae+Ceropegieae). The low support and conflicting position indicate the need for a placement of the genus as an independent tribe. In Asclepiadeae, a sister group position of Cynanchinae to (Asclepiadinae+Tylophorinae) is favored (BSMP = 57, BSML = 74, PP = 0.99), while Schizostephanus is retrieved as unresolved. Oxystelma takes a position at the base of Asclepiadinae (BSMP = 52, BSML = 74, PP = 0.69). Calciphila and Solenostemma are associated with Asclepiadinae with low support (BSMP = 37, BSML = 45, PP = 0.79), but all alternative positions are essentially without support. The position of Indian Asclepiadoideae in the family phylogeny is discussed.} }