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Phylogenetic reconstruction of the genus Triptilion (Asteraceae, Nassauvieae) based on nuclear and chloroplast DNA sequences
Author(s) -
JaraArancio Paola,
Vidal Paula M.,
Arroyo Mary T. K.
Publication year - 2018
Publication title -
journal of systematics and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.249
H-Index - 46
eISSN - 1759-6831
pISSN - 1674-4918
DOI - 10.1111/jse.12294
Subject(s) - paraphyly , clade , biology , genus , phylogenetic tree , evolutionary biology , zoology , genetics , gene
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.