INVESTIGADORES
URTUBEY estrella
congresos y reuniones científicas
Título:
Filogeografía del género monotípico Duseniella (Asteraceae Barnadesioideae) endémico del Monte y Patagonia Argentina
Autor/es:
URTUBEY E.; T. F. STUESSY; JUSTEL I.; NICOLA M.V.
Lugar:
Quito
Reunión:
Congreso; Xll Congreso latinoamericano de Botanica; 2018
Institución organizadora:
varias
Resumen:
Abstract: The ancestral lineage of Asteraceae, Barnadesioideae, consists of eight genera and approximately 95 species. The group originated in southern South America and diverged in response to geographical and climatic changes associated with volcanism and the uplift of the Andes. One of these genera, the scarce monospecific Duseniella, has been hypothesized previously to have originated in the arid regions of the eastern side of the Andes in the Monte and Patagonian regions of Argentina. Plastid and nuclear population genetic molecular markers have been used to assess genetic diversity within and among 20 populations (120 individuals) of Duseniella patagonica. The results show a clear genetic separation within this species of populations from the Monte versus those of Patagonia. Molecular clock estimates, calibrated from fossil pollen data, suggest that Duseniella originated during the Miocene (9.97-14.3 Mya), and that the infraspecific molecular populational divergence within Duseniella patagonica occurred during the Pleistocene (1.31-1.96 Mya).