ArticleAnnals of botany2020
Environmental differences are correlated with the distribution pattern of cytotypes in Veronica subsection Pentasepalae at a broad scale.
Article in Annals of botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed.
- From the Balkan Peninsula to the Mesic Grassland Areas of Central Europe: Morpho-Genetic Diversity and Niche Differentiation in the Allopolyploid Complex of the Austrian Speedwell.Plants (Basel, Switzerland) · 2026Article
- Allopolyploidy enhances survival advantages for urban environments in the native plant genus Commelina.Annals of botany · 2024Article
- Genome Insights into Autopolyploid Evolution: A Case Study inPlants (Basel, Switzerland) · 2022Article
- Phylogeny and Historical Biogeography ofBiology · 2022Article
- Chromosomal view of Lippia alba, a tropical polyploid complex under genome stabilization process.Protoplasma · 2022Article
- Intricate Distribution Patterns of Six Cytotypes ofFrontiers in plant science · 2020Article
- Comparative Phylogeography ofFrontiers in plant science · 2020Article
- So Closely Related and Yet So Different: Strong Contrasts Between the Evolutionary Histories of Species of theFrontiers in plant science · 2020Article
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10 authors.
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Abstract
BACKGROUND AND
aimsThe distribution of cytotypes and its potential correlation with environmental variables represent a cornerstone to understanding the origin and maintenance of polyploid lineages. Although many studies have addressed this question in single species at a regional scale, only a few have attempted to decipher this enigma in groups of closely related species at a broad intercontinental geographical scale. Here, we consider approx. 20 species of a diploid-polyploid complex (Veronica subsect. Pentasepalae) of recent and rapid diversification represented in Europe and North Africa to study the frequency and distribution of cytotypes and their relationship to environmental variables.
methodsA total of 680 individuals (207 populations) were sampled. Ploidy levels were determined using flow cytometry. Ecological differentiation among cytotypes was tested using climatic and environmental variables related to temperature, precipitation, vegetation and biogeographical region, among others, and by performing univariate and multivariate (constrained principal coordinates analysis) analyses. KEY
resultsFour ploidy levels (2x, 4x, 6x and 8x) were found and genome downsizing was observed to occur within the group. Plants of different ploidy level are ecologically differentiated, with hexaploids and octoploids occurring in wetter and colder habitats with a higher seasonality than diploids. A south to north distribution pattern was found, with diploids occupying southern refugial areas and octoploids being more frequent in northern regions of Europe above the permafrost boundary.
conclusionsThe distribution of cytotypes can be explained by ecological differentiation, the geographical position of refuge areas during the Quaternary climatic oscillations as well as by ice and permafrost retreat patterns. The Balkan Peninsula constitutes the most important contact zone between cytotypes. This work provides the first comprehensive ploidy screening within V. subsect. Pentasepalae at a broad scale and indicates that polyploidy and genome downsizing might have contributed to the colonization of new habitats in a recently diverged polyploid complex.
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