Phylogenetic reconstruction of the genus Triptilion (Asteraceae, Nassauvieae) based on nuclear and chloroplast DNA sequences
Author
dc.contributor.author
Jara Arancio, Paola
Author
dc.contributor.author
Vidal, Paula M.
Author
dc.contributor.author
Arroyo, Mary T. K.
Admission date
dc.date.accessioned
2018-07-20T14:22:57Z
Available date
dc.date.available
2018-07-20T14:22:57Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
J. Syst. Evol. 56 (2): 120–128, 2018
es_ES
Identifier
dc.identifier.other
10.1111/jse.12294
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/150089
Abstract
dc.description.abstract
The genus Triptilion is endemic to central Chile, the Mendoza Province and western Patagonia in Argentina. It is currently composed of seven species: T. achilleae, T. benaventii, T. berteroi, T. capillatum, T. cordifolium, T. gibbosum, and T. spinosum. The main objectives of this paper were to determine the phylogenetic relationships of species of Triptilion. We also traced the evolution of annual and perennial life-forms. Historically a close relationship has been described between genera Triptilion and Nassauvia. Phylogenetic analysis of the genus Triptilion and more closely related genera was undertaken using two nuclear (ITS, ETS) and two chloroplast (trnL-F, rpl32-trnL) markers. The topology of the Bayesian inference tree shows that the genus Triptilion is paraphyletic, because Nassauvia lagascae, the only representative of Nassauvia section Caloptilium grouped with T. achilleae, Clade I. The other species of Triptilion form two clades: Clade II composed of T. cordifolium and T. gibbosum and Clade III that includes T. benaventii, T. berteroi, T. capillatum, and T. spinosum. The genus Triptilion originated and diverged during the Miocene. The results of the life history reconstructions indicate that the common ancestor of Triptilion and Nassauvia was perennial. The annual habit appears to be derived in Triptilion. The life-form of the common ancestor of Triptilion was ambiguous; it may have been annual or perennial.