Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex

Polyploidization is one of the most common speciation mechanisms in plants. This is particularly relevant in high mountain environments and/or in areas heavily affected by climatic oscillations. Although the role of polyploidy and the temporal and geographical frameworks of polyploidization have bee...

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Published in:Frontiers in Plant Science
Main Authors: Salvatore Tomasello, Christoph Oberprieler
Format: Article in Journal/Newspaper
Language:English
Published: Frontiers Media S.A. 2022
Subjects:
Online Access:https://doi.org/10.3389/fpls.2022.842842
https://doaj.org/article/5276e25fa3304cc586ace9f851fdc581
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spelling ftdoajarticles:oai:doaj.org/article:5276e25fa3304cc586ace9f851fdc581 2023-05-15T15:14:57+02:00 Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex Salvatore Tomasello Christoph Oberprieler 2022-06-01T00:00:00Z https://doi.org/10.3389/fpls.2022.842842 https://doaj.org/article/5276e25fa3304cc586ace9f851fdc581 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fpls.2022.842842/full https://doaj.org/toc/1664-462X 1664-462X doi:10.3389/fpls.2022.842842 https://doaj.org/article/5276e25fa3304cc586ace9f851fdc581 Frontiers in Plant Science, Vol 13 (2022) Anthemideae AllCoPol BEAST2 Leucanthemopsis polyploidy reticulate evolution Plant culture SB1-1110 article 2022 ftdoajarticles https://doi.org/10.3389/fpls.2022.842842 2022-12-30T21:39:11Z Polyploidization is one of the most common speciation mechanisms in plants. This is particularly relevant in high mountain environments and/or in areas heavily affected by climatic oscillations. Although the role of polyploidy and the temporal and geographical frameworks of polyploidization have been intensively investigated in the alpine regions of the temperate and arctic biomes, fewer studies are available with a specific focus on the Mediterranean region. Leucanthemopsis (Asteraceae) consists of six to ten species with several infraspecific entities, mainly distributed in the western Mediterranean Basin. It is a polyploid complex including montane, subalpine, and strictly alpine lineages, which are locally distributed in different mountain ranges of Western Europe and North Africa. We used a mixed approach including Sanger sequencing and (Roche-454) high throughput sequencing of amplicons to gather information from single-copy nuclear markers and plastid regions. Nuclear regions were carefully tested for recombinants/PCR artifacts and for paralogy. Coalescent-based methods were used to infer the number of polyploidization events and the age of formation of polyploid lineages, and to reconstruct the reticulate evolution of the genus. Whereas the polyploids within the widespread Leucanthemopsis alpina are autopolyploids, the situation is more complex among the taxa endemic to the western Mediterranean. While the hexaploid, L. longipectinata, confined to the northern Moroccan mountain ranges (north–west Africa), is an autopolyploid, the Iberian polyploids are clearly of allopolyploid origins. At least two different polyploidization events gave rise to L. spathulifolia and to all other tetraploid Iberian taxa, respectively. The formation of the Iberian allopolyploids took place in the early Pleistocene and was probably caused by latitudinal and elevational range shifts that brought into contact previously isolated Leucanthemopsis lineages. Our study thus highlights the importance of the Pleistocene climatic ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Frontiers in Plant Science 13
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Anthemideae
AllCoPol
BEAST2
Leucanthemopsis
polyploidy
reticulate evolution
Plant culture
SB1-1110
spellingShingle Anthemideae
AllCoPol
BEAST2
Leucanthemopsis
polyploidy
reticulate evolution
Plant culture
SB1-1110
Salvatore Tomasello
Christoph Oberprieler
Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
topic_facet Anthemideae
AllCoPol
BEAST2
Leucanthemopsis
polyploidy
reticulate evolution
Plant culture
SB1-1110
description Polyploidization is one of the most common speciation mechanisms in plants. This is particularly relevant in high mountain environments and/or in areas heavily affected by climatic oscillations. Although the role of polyploidy and the temporal and geographical frameworks of polyploidization have been intensively investigated in the alpine regions of the temperate and arctic biomes, fewer studies are available with a specific focus on the Mediterranean region. Leucanthemopsis (Asteraceae) consists of six to ten species with several infraspecific entities, mainly distributed in the western Mediterranean Basin. It is a polyploid complex including montane, subalpine, and strictly alpine lineages, which are locally distributed in different mountain ranges of Western Europe and North Africa. We used a mixed approach including Sanger sequencing and (Roche-454) high throughput sequencing of amplicons to gather information from single-copy nuclear markers and plastid regions. Nuclear regions were carefully tested for recombinants/PCR artifacts and for paralogy. Coalescent-based methods were used to infer the number of polyploidization events and the age of formation of polyploid lineages, and to reconstruct the reticulate evolution of the genus. Whereas the polyploids within the widespread Leucanthemopsis alpina are autopolyploids, the situation is more complex among the taxa endemic to the western Mediterranean. While the hexaploid, L. longipectinata, confined to the northern Moroccan mountain ranges (north–west Africa), is an autopolyploid, the Iberian polyploids are clearly of allopolyploid origins. At least two different polyploidization events gave rise to L. spathulifolia and to all other tetraploid Iberian taxa, respectively. The formation of the Iberian allopolyploids took place in the early Pleistocene and was probably caused by latitudinal and elevational range shifts that brought into contact previously isolated Leucanthemopsis lineages. Our study thus highlights the importance of the Pleistocene climatic ...
format Article in Journal/Newspaper
author Salvatore Tomasello
Christoph Oberprieler
author_facet Salvatore Tomasello
Christoph Oberprieler
author_sort Salvatore Tomasello
title Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
title_short Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
title_full Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
title_fullStr Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
title_full_unstemmed Reticulate Evolution in the Western Mediterranean Mountain Ranges: The Case of the Leucanthemopsis Polyploid Complex
title_sort reticulate evolution in the western mediterranean mountain ranges: the case of the leucanthemopsis polyploid complex
publisher Frontiers Media S.A.
publishDate 2022
url https://doi.org/10.3389/fpls.2022.842842
https://doaj.org/article/5276e25fa3304cc586ace9f851fdc581
geographic Arctic
geographic_facet Arctic
genre Arctic
genre_facet Arctic
op_source Frontiers in Plant Science, Vol 13 (2022)
op_relation https://www.frontiersin.org/articles/10.3389/fpls.2022.842842/full
https://doaj.org/toc/1664-462X
1664-462X
doi:10.3389/fpls.2022.842842
https://doaj.org/article/5276e25fa3304cc586ace9f851fdc581
op_doi https://doi.org/10.3389/fpls.2022.842842
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