Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework

Genome size is a fundamental biological characteristic, yet its evolutionary dynamics remain insufficiently understood, partly because few plant groups offer the cytogenetic and phylogenomic data required for genus-level analyses. In this study, we estimated genome size (2C values) for 80 species (c...

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Autores: Martín-Herranz, Sara, González Albaladejo, Rafael, Viruel, Juan, Matos, Rafael, Brito Lopes, Sara, Rubio, Encarnación, Castro, Mariana, Loureiro, João, Volkova, Polina, Aparicio Martínez, Abelardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:dnet:idus________::5380554bfee350bb6c6d8a196757636d
Acceso en línea:https://hdl.handle.net/11441/186371
https://doi.org/10.1016/j.ympev.2026.108627
Access Level:acceso abierto
Palabra clave:Genome size
Karyotype evolution
Helianthemum
Cistaceae
Flow cytometry
Phylogenomics
Angiosperms353
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spelling Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal frameworkMartín-Herranz, SaraGonzález Albaladejo, RafaelViruel, JuanMatos, RafaelBrito Lopes, SaraRubio, EncarnaciónCastro, MarianaLoureiro, JoãoVolkova, PolinaAparicio Martínez, AbelardoGenome sizeKaryotype evolutionHelianthemumCistaceaeFlow cytometryPhylogenomicsAngiosperms353Genome size is a fundamental biological characteristic, yet its evolutionary dynamics remain insufficiently understood, partly because few plant groups offer the cytogenetic and phylogenomic data required for genus-level analyses. In this study, we estimated genome size (2C values) for 80 species (c, 75% of the genus), covering all infrageneric categories (three subgenera, ten sections). Genome-size evolution was examined within a newly generated, time-calibrated phylogenetic framework based on the Angiosperms353 target-capture probe set including 89% of the species in the genus, and integrated with updated karyotype descriptors including chromosome numbers, total haploid karyotype length (THL), interchromosomal coefficient of variation in chromosome length (CVCL), and intrachromosomal mean centromeric asymmetry (MCA). Genome size varied 6.5-fold across the genus, ranging from 1.65 to 10.60 pg (i.e., from very small to intermediate genomes). Phylogenetically informed regressions revealed a strong positive relationship between 2C values and THL, indicating that changes in nuclear DNA content are accommodated by proportional modifications in chromosome size. In contrast, genome size showed no significant association with chromosome number or karyotype asymmetry, suggesting that genome-size diversification has occurred largely independently of major chromosomal rearrangements. Chromosome-number reconstructions confirmed a highly conserved karyotype across the genus, with only a single abrupt shift and a small number of minor dysploid changes. Ancestral-state reconstruction and comparative evolutionary modelling revealed that genome-size diversification is strongly shaped by phylogenetic structure and characterised by repeated reductions from an intermediate ancestral genome. Overall, Helianthemum provides a powerful model for understanding how genome size evolves within a conserved chromosomal framework.ElsevierBiología Vegetal y EcologíaMinisterio de Economía y Competitividad (MINECO). EspañaMinisterio de Ciencia e Innovación (MICIN). España2026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/186371https://doi.org/10.1016/j.ympev.2026.108627reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésnullCGL2017-82465-PPID2020-116355GB-I00https://www.sciencedirect.com/science/article/pii/S1055790326000977?via%3Dihubinfo:eu-repo/semantics/openAccessoai:dnet:idus________::5380554bfee350bb6c6d8a196757636d2026-06-17T12:51:07Z
dc.title.none.fl_str_mv Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
title Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
spellingShingle Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
Martín-Herranz, Sara
Genome size
Karyotype evolution
Helianthemum
Cistaceae
Flow cytometry
Phylogenomics
Angiosperms353
title_short Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
title_full Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
title_fullStr Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
title_full_unstemmed Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
title_sort Genome size evolution in Helianthemum (Cistaceae): Dynamic genomes within a conserved chromosomal framework
dc.creator.none.fl_str_mv Martín-Herranz, Sara
González Albaladejo, Rafael
Viruel, Juan
Matos, Rafael
Brito Lopes, Sara
Rubio, Encarnación
Castro, Mariana
Loureiro, João
Volkova, Polina
Aparicio Martínez, Abelardo
author Martín-Herranz, Sara
author_facet Martín-Herranz, Sara
González Albaladejo, Rafael
Viruel, Juan
Matos, Rafael
Brito Lopes, Sara
Rubio, Encarnación
Castro, Mariana
Loureiro, João
Volkova, Polina
Aparicio Martínez, Abelardo
author_role author
author2 González Albaladejo, Rafael
Viruel, Juan
Matos, Rafael
Brito Lopes, Sara
Rubio, Encarnación
Castro, Mariana
Loureiro, João
Volkova, Polina
Aparicio Martínez, Abelardo
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Biología Vegetal y Ecología
Ministerio de Economía y Competitividad (MINECO). España
Ministerio de Ciencia e Innovación (MICIN). España
dc.subject.none.fl_str_mv Genome size
Karyotype evolution
Helianthemum
Cistaceae
Flow cytometry
Phylogenomics
Angiosperms353
topic Genome size
Karyotype evolution
Helianthemum
Cistaceae
Flow cytometry
Phylogenomics
Angiosperms353
description Genome size is a fundamental biological characteristic, yet its evolutionary dynamics remain insufficiently understood, partly because few plant groups offer the cytogenetic and phylogenomic data required for genus-level analyses. In this study, we estimated genome size (2C values) for 80 species (c, 75% of the genus), covering all infrageneric categories (three subgenera, ten sections). Genome-size evolution was examined within a newly generated, time-calibrated phylogenetic framework based on the Angiosperms353 target-capture probe set including 89% of the species in the genus, and integrated with updated karyotype descriptors including chromosome numbers, total haploid karyotype length (THL), interchromosomal coefficient of variation in chromosome length (CVCL), and intrachromosomal mean centromeric asymmetry (MCA). Genome size varied 6.5-fold across the genus, ranging from 1.65 to 10.60 pg (i.e., from very small to intermediate genomes). Phylogenetically informed regressions revealed a strong positive relationship between 2C values and THL, indicating that changes in nuclear DNA content are accommodated by proportional modifications in chromosome size. In contrast, genome size showed no significant association with chromosome number or karyotype asymmetry, suggesting that genome-size diversification has occurred largely independently of major chromosomal rearrangements. Chromosome-number reconstructions confirmed a highly conserved karyotype across the genus, with only a single abrupt shift and a small number of minor dysploid changes. Ancestral-state reconstruction and comparative evolutionary modelling revealed that genome-size diversification is strongly shaped by phylogenetic structure and characterised by repeated reductions from an intermediate ancestral genome. Overall, Helianthemum provides a powerful model for understanding how genome size evolves within a conserved chromosomal framework.
publishDate 2026
dc.date.none.fl_str_mv 2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/186371
https://doi.org/10.1016/j.ympev.2026.108627
url https://hdl.handle.net/11441/186371
https://doi.org/10.1016/j.ympev.2026.108627
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv null
CGL2017-82465-P
PID2020-116355GB-I00
https://www.sciencedirect.com/science/article/pii/S1055790326000977?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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