The holocentric chromosome microevolution: From phylogeographic patterns to genomic associations with environmental gradients.
Name
Molecular_Ecology_-_2023_-_M_rquez_Corro_-_The_holocentric_chromosome_microevolution__From_phylogeographic_patterns_to.pdf
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16.84 MB
Format
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Resource type
Journal article
Date published
October 5, 2023
Abstract
Geographic isolation and chromosome evolution are two of the major drivers of diversification in eukaryotes in general, and specifically, in plants. On one hand, range shifts induced by Pleistocene glacial oscillations deeply shaped the evolutionary trajectories of species in the Northern Hemisphere. On the other hand, karyotype variability within species or species complexes may have adaptive potential as different karyotypes may represent different recombination rates and linkage groups that may be associated with locally adapted genes or supergenes. Organisms with holocentric chromosomes are ideal to study the link between local adaptation and chromosome evolution, due to their high cytogenetic variability, especially when it seems to be related to environmental variation. Here, we integrate the study of the phylogeography, chromosomal evolution and ecological requirements of a plant species complex distributed in the Western Euro‐Mediterranean region ( gr. , Cyperaceae). We aim to clarify the relative influence of these factors on population differentiation and ultimately on speciation. We obtained a well‐resolved RADseq phylogeny that sheds light on the phylogeographic patterns of molecular and chromosome number variation, which are compatible with south‐to‐north postglacial migration. In addition, landscape genomics analyses identified candidate loci for local adaptation, and also strong significant associations between the karyotype and the environment. We conclude that karyotype distribution in gr. has been constrained by both range shift dynamics and local adaptation. Our study demonstrates that chromosome evolution may be responsible, at least partially, for microevolutionary patterns of population differentiation and adaptation in .
Funder
| Funder name | Awards |
Junta de Andalucía, Spain | Project ProyExcel_00125 |
Ministerio de Economía y Competitividad, Spain | BES-2017-079621 |
Ministerio de Universidades, Spain | ‘Next Generation EU’ funding, the Recovery Plan, Transformation and Resilience and the Ministry of Universities, under the grants ‘Margarita Salas’ for the requalification of the Spanish university system 2021-2023 called by the Universidad Pablo de Olavide, Seville. |
Federación Española de Enfermedades Raras, Spain / Ministerio de Ciencia e Innovación, Spain / Agencia Estatal de Investigación, Spain | PID2021-122715NB-I00 |
Ministerio de Ciencia e Innovación, Spain / Agencia Estatal de Investigación, Spain | CHRONOS project (PID2020119327RJ-I00 MCIN/AEI/10.13039/501100011033). |
Journal title
Molecular Ecology
Article number
mec.17156
Publisher
John Wiley & Sons Ltd.
Place of publication
UK
ISSN
0962-1083
eISSN
1365-294X
Date accepted
September 22, 2023
Official URL
Rights statement
In Copyright
Additional information
IF = 6.622 (2022-2023)