IBODA   05360
INSTITUTO DE BOTANICA DARWINION
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Long-distance relationships in Polemoniaceae: a tale of two species.
Autor/es:
JOHNSON, L.; POZNER, R.
Lugar:
Chicago, Illinois
Reunión:
Congreso; Plant Biology & Botany 2007 Conference; 2007
Institución organizadora:
Botanical Society of America
Resumen:
The sister genera Collomia and Navarretia are largely
restricted to Western North America, with approximately 34 of 35 species of Navarretia
and 14 of 15 species of Collomia native to this region. The earliest
named entities in both genera, however, are single species native to Western
South America that occur in comparable habitats to their North American
counterparts along either side of the Andes.
Several other genera of Polemoniaceae, for instance Ipomopsis, Leptosiphon,
and Gilia, show similar biogeographic patterns that support a North
American origin of the temperate genera of Polemoniaceae as well as multiple
dispersal events to South America usually associated with the formation of
novel species. This general pattern has been discussed previously; here, we
move beyond this general pattern to explore specifically the phylogenetic
relationships of Collomia biflora, Navarretia involucrata,
and their North American counterparts. Character evolution, taxonomy, and the
relative timing of dispersal are elaborated in light of both morphological and
molecular data.