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Artículo

Intraspecific phylogeny of a Patagonian fescue: Differentiation at molecular markers and morphological traits suggests hybridization at peripheral populations

Guidalevich, VeronicaIcon ; Nagahama, NicolasIcon ; López, Aldana SoledadIcon ; Angelini, Juan PabloIcon ; Marchelli, PaulaIcon ; Azpilicueta, María Marta
Fecha de publicación: 05/2023
Editorial: Oxford University Press
Revista: Annals of Botany
ISSN: 0305-7364
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de las Plantas, Botánica

Resumen

Background and Aims: Grasses of the Festuca genus have complex phylogenetic relations due to morphological similarities among species and interspecific hybridization processes. Within Patagonian fescues, information concerning phylogenetic relationships is very scarce. In Festuca pallescens, a widely distributed species, the high phenotypic variability and the occurrence of interspecific hybridization preclude a clear identification of the populations. Given the relevance of natural rangelands for livestock production and their high degradation due to climate change, conservation actions are needed and knowledge about genetic variation is required. Methods: To unravel the intraspecific phylogenetic relations and to detect genetic differences, we studied 21 populations of the species along its natural geographical distribution by coupling both molecular [internal transcribed spacer (ITS) and trnL-F markers] and morpho-anatomical analyses. Bayesian inference, maximum likelihood and maximum parsimony methods were applied to assemble a phylogenetic tree, including other native species. The morphological data set was analysed by discriminant and cluster analyses. Key Results: The combined information of the Bayesian tree (ITS marker), the geographical distribution of haplotype variants (trnL-F marker) and the morpho-anatomical traits, distinguished populations located at the margins of the distribution. Some of the variants detected were shared with other sympatric species of fescues. Conclusions: These results suggest the occurrence of hybridization processes between species of the genus at peripheral sites characterized by suboptimal conditions, which might be key to the survival of these populations.
Palabras clave: CHLOROPLAST DNA MARKERS , FESTUCA , FESTUCA PALLESCENS , GLACIAL REFUGIA , HYBRIDIZATION , INTRASPECIFIC GENETIC DIFFERENTIATION , ITS , MORPHO-ANATOMICAL ANALYSES , PATAGONIA , PHYLOGENETIC RELATIONSHIPS , PLANT TRAITS , SPECIATION
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/220884
URL: https://academic.oup.com/aob/article-abstract/131/6/1011/7174887?redirectedFrom=
DOI: https://doi.org/10.1093/aob/mcad060
Colecciones
Articulos (IFAB)
Articulos de INSTITUTO DE INVESTIGACIONES FORESTALES Y AGROPECUARIAS BARILOCHE
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Guidalevich, Veronica; Nagahama, Nicolas; López, Aldana Soledad; Angelini, Juan Pablo; Marchelli, Paula; et al.; Intraspecific phylogeny of a Patagonian fescue: Differentiation at molecular markers and morphological traits suggests hybridization at peripheral populations; Oxford University Press; Annals of Botany; 131; 6; 5-2023; 1011-1023
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