The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation
Deschampsia P. Beauv. is a cosmopolitan grass genus, which grows in cold and temperate regions, including about 15 species growing in South America and Antarctica. The species delimitation is difficult due to the high phenotypic plasticity and the likely occurrence of hybridization which generates s...
Published in: | Systematics and Biodiversity |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/145915 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/145915 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/145915 2023-10-09T21:47:13+02:00 The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation González, María Laura Chiapella, Jorge Oscar Urdampilleta, Juan Domingo application/pdf http://hdl.handle.net/11336/145915 eng eng Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.1080/14772000.2020.1860151 info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/14772000.2020.1860151 http://hdl.handle.net/11336/145915 González, María Laura; Chiapella, Jorge Oscar; Urdampilleta, Juan Domingo; The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation; Cambridge University Press; Systematics And Biodiversity; 19; 5; 3-2021; 453-470 1477-2000 1478-0933 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CYTOGENETICS DESCHAMPSIA EVOLUTION PHYLOGENY RDNA SOUTH AMERICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1080/14772000.2020.1860151 2023-09-24T18:49:46Z Deschampsia P. Beauv. is a cosmopolitan grass genus, which grows in cold and temperate regions, including about 15 species growing in South America and Antarctica. The species delimitation is difficult due to the high phenotypic plasticity and the likely occurrence of hybridization which generates species complexes with high morphological affinity. This work aims to describe the cytogenetic traits of the South American species of Deschampsia, highlighting similarities and differences in a phylogenetic context. We report the chromosome number of seven species of Deschampsia and Deyeuxia eminens for the first time, verifying that basic chromosome number x = 13 is shared by all the species. We found that the phylogenetic relationships are in agreement with the morphological affinities described in the species revisions, and the species of Deschampsia and Deyeuxia Sect. Stylagrostis form a well-supported clade. Despite the variation from x = 13 reported for populations of Deschampsia in the northern hemisphere, all the South American and Antarctic taxa studied here have a conserved basic chromosome number. Polyploids were found in several species, which suggests that genomic duplication is a recurrent process in the evolutionary history of Deschampsia. In contrast with the conserved chromosome morphology, the rDNA pattern showed high intra- and inter-specific variability and it is related to the phylogeny. Particularly, the complex of D. cespitosa is polymorphic for the distribution pattern of rDNA, as was also seen for molecular and morphological traits. Our results suggest that the common ancestor between Deschampsia and Deyeuxia sec. Stylagrostis could have had chromosomal characteristics currently shared by both. The incorporation of new chromosomal, molecular, and morphological data in Deyeuxia species will allow clarification of the close phylogenetic relationship with Deschampsia, in which reticulation and hybridization events cannot be excluded. Fil: González, María Laura. Consejo Nacional de ... Article in Journal/Newspaper Antarc* Antarctic Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Systematics and Biodiversity 19 5 453 470 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
CYTOGENETICS DESCHAMPSIA EVOLUTION PHYLOGENY RDNA SOUTH AMERICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
CYTOGENETICS DESCHAMPSIA EVOLUTION PHYLOGENY RDNA SOUTH AMERICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 González, María Laura Chiapella, Jorge Oscar Urdampilleta, Juan Domingo The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
topic_facet |
CYTOGENETICS DESCHAMPSIA EVOLUTION PHYLOGENY RDNA SOUTH AMERICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Deschampsia P. Beauv. is a cosmopolitan grass genus, which grows in cold and temperate regions, including about 15 species growing in South America and Antarctica. The species delimitation is difficult due to the high phenotypic plasticity and the likely occurrence of hybridization which generates species complexes with high morphological affinity. This work aims to describe the cytogenetic traits of the South American species of Deschampsia, highlighting similarities and differences in a phylogenetic context. We report the chromosome number of seven species of Deschampsia and Deyeuxia eminens for the first time, verifying that basic chromosome number x = 13 is shared by all the species. We found that the phylogenetic relationships are in agreement with the morphological affinities described in the species revisions, and the species of Deschampsia and Deyeuxia Sect. Stylagrostis form a well-supported clade. Despite the variation from x = 13 reported for populations of Deschampsia in the northern hemisphere, all the South American and Antarctic taxa studied here have a conserved basic chromosome number. Polyploids were found in several species, which suggests that genomic duplication is a recurrent process in the evolutionary history of Deschampsia. In contrast with the conserved chromosome morphology, the rDNA pattern showed high intra- and inter-specific variability and it is related to the phylogeny. Particularly, the complex of D. cespitosa is polymorphic for the distribution pattern of rDNA, as was also seen for molecular and morphological traits. Our results suggest that the common ancestor between Deschampsia and Deyeuxia sec. Stylagrostis could have had chromosomal characteristics currently shared by both. The incorporation of new chromosomal, molecular, and morphological data in Deyeuxia species will allow clarification of the close phylogenetic relationship with Deschampsia, in which reticulation and hybridization events cannot be excluded. Fil: González, María Laura. Consejo Nacional de ... |
format |
Article in Journal/Newspaper |
author |
González, María Laura Chiapella, Jorge Oscar Urdampilleta, Juan Domingo |
author_facet |
González, María Laura Chiapella, Jorge Oscar Urdampilleta, Juan Domingo |
author_sort |
González, María Laura |
title |
The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
title_short |
The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
title_full |
The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
title_fullStr |
The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
title_full_unstemmed |
The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation |
title_sort |
antarctic and south american species of deschampsia: phylogenetic relationships and cytogenetic differentiation |
publisher |
Cambridge University Press |
url |
http://hdl.handle.net/11336/145915 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1080/14772000.2020.1860151 info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/14772000.2020.1860151 http://hdl.handle.net/11336/145915 González, María Laura; Chiapella, Jorge Oscar; Urdampilleta, Juan Domingo; The Antarctic and South American species of Deschampsia: phylogenetic relationships and cytogenetic differentiation; Cambridge University Press; Systematics And Biodiversity; 19; 5; 3-2021; 453-470 1477-2000 1478-0933 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1080/14772000.2020.1860151 |
container_title |
Systematics and Biodiversity |
container_volume |
19 |
container_issue |
5 |
container_start_page |
453 |
op_container_end_page |
470 |
_version_ |
1779310155804966912 |