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Phylogeny of the tribe Aveneae (Pooideae, Poaceae) inferred from plastid trnT‐F and nuclear ITS sequences
Author(s) -
Quintanar Alejandro,
Castroviejo Santiago,
Catalán Pilar
Publication year - 2007
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.3732/ajb.94.9.1554
Subject(s) - biology , tribe , phylogenetics , plastid , lineage (genetic) , maximum parsimony , evolutionary biology , phylogenetic tree , molecular phylogenetics , clade , genetics , gene , chloroplast , sociology , anthropology
New insights into evolutionary trends in the economically important oat tribe (Aveneae) are presented. Plastid trnT‐F and nuclear ribosomal ITS sequences were used to reconstruct the phylogeny of the Aveneae–Poeae–Seslerieae complex (Pooideae, Poaceae) through Bayesian‐ and maximum parsimony‐based analyses, separately and in combination. The plastid data identified a strongly supported core Aveneae lineage that separated from other former Aveneae and Poeae groups. Koeleriinae, Aveninae, and Agrostidinae emerged as the main groups of this core Aveneae, which also included other minor subgroups with uncertain relationships and a few former Poeae members. Several former Aveneae representatives were also placed in independent sublineages in Poeae. Seslerieae resolved as close allies of Poeae or Aveneae in the plastid and nuclear topologies, respectively. Because of the intermingling of some Aveneae and Seslerieae lineages in Poeae and vice versa, we propose to expand Poeae to include all the aforementioned lineages. This best reflects our current understanding of the phylogeny of these important temperate grasses and sheds light on their evolutionary history.