info:eu-repo/semantics/article
Comparative phylogeography, morphological boundaries and climate envelopes of two sympatric widespread Bromeliaceae from the southern Andes
Fecha
2020-04Registro en:
Castello, Lucía Virginia; Chiapella, Jorge Oscar; Barfuss, Michael H. J.; Till, Walter; Quiroga, Maria Paula; et al.; Comparative phylogeography, morphological boundaries and climate envelopes of two sympatric widespread Bromeliaceae from the southern Andes; Oxford University Press; Botanical Journal of The Linnean Society; 192; 4; 4-2020; 726-743
0024-4074
1095-8339
CONICET Digital
CONICET
Autor
Castello, Lucía Virginia
Chiapella, Jorge Oscar
Barfuss, Michael H. J.
Till, Walter
Quiroga, Maria Paula
Premoli Il'grande, Andrea Cecilia
Resumen
We studied the epiphytic species Tillandsia capillaris and T. virescens that grow as neotenic forms with autogamous and cleistogamous flowers. They have expanded in Andean mountain environments, where they grow sympatrically across most of their ranges in arid regions of Peru, central-western Bolivia and north-central Argentina and Chile. We studied the relationships between the two species and populations within each of them, the morphological boundaries and the climatic characterization of distinct genetic entities. We analysed 125 and 102 individuals from 25 and 27 populations of T. virescens and T. capillaris, respectively, by means of haplotype networks, phylogenetic and genetic structure analyses, using the plastid gene ycf1 (c. 4500 bp) to define genetic groups. Morphological studies by discriminant analyses and correlation with climatic variables extracted from WorldClim were used to test differentiations among the genetic groups within each species. We confirm that T. capillaris is a distinct entity and that T. virescens consists of three groups that diverged by vicariance from widespread ancestors. The high genetic diversity found in both species is consistent with the complex geography of the Andes and the Pleistocene glaciation cycles that have driven ecological speciation in both species reflected in the timing of divergence of the clusters.