ERIKSSON, TORSTEN1,2*, JENNY E. E. SMEDMARK1,2, MALIN S. HIBBS3, and PIA OSTENSSON2. 1Bergius Foundation, Royal Swedish Academy of Sciences, Box 50017, SE-104 05 Stockholm, Sweden; 2Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden; 3Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742-5815, U.S.A.. - Phylogeny of Rosoideae (Rosaceae).
During the last decade, much progress have been made on elucidating
the phylogeny of Rosaceae through the use of molecular sequence data.
David Morgan and coworkers (1994) found support for a re-circumscribed
Rosoideae clade. We analysed Rosoideae in this strict sense, mainly
using ITS and trnL/F sequence data, rooting trees on the
Filipendula branch. Most newly discovered clades of the
"backbone" of the Rosoideae tree are now well supported, and
some of these require names. Other well supported clades include:
Colurieae with Fallugia, Sieversia, Waldsteinia and Geum
s. lat.; Rosa; Sanguisorbeae with the petaloid Agrimonia,
Aremonia, Leucosidea, and Hagenia, as sister to a
non-petaloid clade containing Sanguisorba, Acaena, Polylepis,
among others; Potentilleae divided into Potentilla s. str.
(including P. anserina and relatives) which is sister to
Fragariinae, the latter containing Alchemilla, Fragaria,
Chamaerhodos, Comarum, Sibbaldiopsis, some Sibbaldia as
well as at least some Potentilla species. In our sample,
Acaena, Geum (and most of its segregates), Sibbaldia,
and Potentilla, as delimited traditionally, are polyphyletic.
The position of Rubus is not securely resolved. If the remnants
of Dryadeae is sister to Rosoideae, as some analyses indicate, the
wind dispersed achenes with elongate plumose styles may be
plesiomorphic within Rosoideae. The similarity of the fruits of some
species in Colurieae and Dryadeae would then be explained, but it
might make the interpretation of the evolution of the
Filipendula fruit more complex.
Key words: Phylogeny Rosoideae Rosaceae