IBODA   05360
INSTITUTO DE BOTANICA DARWINION
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Systematics of the tribe Buddlejeae (Scrophulariaceae): phylogenetic relationships, biogeography, and morphological evolution
Autor/es:
CHAU JOHN; O'LEARY, NATALY; OLMSTEAD, RICHARD
Lugar:
Boise, Idaho
Reunión:
Congreso; BOTANY 2014; 2014
Institución organizadora:
ASPT
Resumen:
Buddleja belongs in the predominantly
southern hemisphere Scrophulariaceae s.s., it is the largest genus of tribe
Buddlejeae with nearly 100 species and with the broadest distribution, being
found in tropical, subtropical, and temperate zones of Africa, America, and
Asia, but with the greatest species diversity in America. Buddleja is closely related to the other 4 genera from tribe
Buddlejeae: Chilianthus, Gomphostigma,
Emorya and Nicodemia. Molecular
phylogenetic studies base on nearly 150 taxa, employing nuclear ETS and two PPR
loci, as well as three chloroplast loci (trn
D-T, trnS-fm, rpoA) evidence monophyly of genus Buddleja, including under it genera
Nicodemia, Chilianthus, Emorya and Gomphostigma. American
taxa form a highly supported clade. American species from Norman?s ser. Cordatae seem to form the basal
grade within this american clade; the series Stachyoides and Thyrsoides are the
more recently diversificated. This encloses biogegraphic implications, indicating
a direction of colonization from North America to South
America, given series Cordatae is primarily north American and
both series Stachyoides and Thyrsoides are south American. Apart from that, Asian
taxa also form a clade, and African species are the most basal ones, suggesting
a South African origin of genus Buddelja,
where Malagasy and Arabian Asia
could be part of the dispersion route.