Insights into phylogenetic divergence of Dalbergia (Leguminosae: Dalbergiae) from Mexico and Central America
Por:
Sotuyo, Solange, Pedraza-Ortega, Euler, Martinez-Salas, Esteban, Linares, Jose, Cabrera, Lidia
Publicada:
28 jul 2022
Resumen:
The pantropical genus Dalbergia includes more than 250 species.
Phylogenetic studies of the group are scarce and have only included two
or three species distributed in Mexico. We obtained herbarium samples of
Mexican, Central American, and South American species (sourced from
MEXU). In addition, sequences of GenBank accessions were used to
complement the study. Using internal transcribed spacer (ITS), the matK
and rbcL sequences from 384 accessions comprising species from America,
Asia, and Africa were sampled to evaluate phylogenetic relationships of
Mexican species and infrageneric classifications based on morphological
data. Phylogenetic analyses suggest that the genus Dalbergia is
monophyletic and originated in South America. The species distributed in
Mexico are not a monophyletic clade but are divided into four clades
with affinities to South American and Asian species clades. There is no
correlation between geography and large-scale phylogeny. The estimated
ages of the Mexican and Central American clades ranged from 11.32 Ma
(Dalbergia granadillo clade) to 1.88 Ma (Dalbergia ecastaphyllum clade).
Multiple long-distance dispersal events should be used to explain the
current genus distribution.
Filiaciones:
Sotuyo, Solange:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City, Mexico
Pedraza-Ortega, Euler:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City, Mexico
Martinez-Salas, Esteban:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City, Mexico
Linares, Jose:
Ctr Univ Reg Litoral Atlant CURLA, Ceiba, Honduras
Cabrera, Lidia:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City, Mexico
gold, All Open Access; Gold
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