ibclogo XVI International Botanical Congess


Abstract Number: 3556
Poster No. = 2491


THE PHYLOGENY OF ROSOIDEAE (ROSACEAE) AS EVIDENCED BY DNA SEQUENCES FROM ITS (NUCLEAR RIBOSOMAL DNA) AND THE TRNL/F REGION (CHLOROPLAST DNA).


Torsten Eriksson1,2, Michael J. Donoghue2, and Anne D. Yoder31. Bergius Foundation, Stockholm, Sweden. 2. Harvard University Herbaria, Cambridge, MA. 3. Northwestern University and Field Museum of Natural History, Chicago, IL.


A combination of ribosomal (internal transcribed spacers) and trnL/F (spacer and intron) DNA sequences were used to infer the phylogeny of Rosoideae. A previous study of ITS data alone had indicated that Potentilla as traditionally circumscribed is paraphyletic and that some parts are more closely related to other genera such as Alchemilla, Fragaria and Sibbaldia. The trnL/F data supports the ITS data to a large extent and the results from the combined analysis is congruent with the well supported clades of the ITS data. Most clades which were weakly supported in the ITS data yield better support in the combined analysis.


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