Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure
- Autores
- Honfi, Ana Isabel; Reutemann, Anna Verena; Schneider, Juan Sebastián; Escobar, Lucas Mateo; Martínez, Eric Javier; Daviña, Julio Rubén
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Background/Objectives: Paspalum notatum is a key multipurpose species native to American grasslands. This study provides, for the first time, a detailed karyotype analysis of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) accessions of P. notatum, the most common cytotypes within the species. Methods: The constitutive heterochromatin patterns revealed using CMA-DA-DAPI staining and genome size estimations are novel contributions to the understanding of the N genome in Paspalum. Results: Chromosomes were small (1.1–2.3 µm), with the diploid karyotype comprising nine metacentric pairs (one bearing microsatellites on the short arms, pair 6) and one submetacentric pair. In tetraploids, the diploid karyotype was duplicated. Heterochromatin analysis revealed two CMA++/DAPI− bands located on the short arm and satellite of chromosome 6 in diploids, while tetraploids exhibited two to three CMA++/DAPI− and one to two CMA++/DAPI0 bands. The proportion of GC-rich heterochromatin represented 2.8 and 3.47% of the total chromosome length in diploid and tetraploid cytotypes, respectively. Genome size analysis revealed a reduction in monoploid genome size in tetraploids (1Cx = 0.678 pg) compared to diploids (1Cx = 0.71 pg), consistent with the autopolyploid origin hypothesis. Conclusions: These findings provide essential cytogenetic insights and suggest only minor structural changes in the N genome following polyploidization, which could guide future studies integrating genomic and cytogenetic maps of P. notatum.
Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina
Fil: Reutemann, Anna Verena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Schneider, Juan Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina
Fil: Escobar, Lucas Mateo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina
Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Daviña, Julio Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina - Materia
-
chromosome banding patterns
karyotype evolution
forage grasses
constitutive heterochromatin
polyploid
genome size - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/271617
Ver los metadatos del registro completo
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Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome StructureHonfi, Ana IsabelReutemann, Anna VerenaSchneider, Juan SebastiánEscobar, Lucas MateoMartínez, Eric JavierDaviña, Julio Rubénchromosome banding patternskaryotype evolutionforage grassesconstitutive heterochromatinpolyploidgenome sizehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1https://purl.org/becyt/ford/4.5https://purl.org/becyt/ford/4Background/Objectives: Paspalum notatum is a key multipurpose species native to American grasslands. This study provides, for the first time, a detailed karyotype analysis of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) accessions of P. notatum, the most common cytotypes within the species. Methods: The constitutive heterochromatin patterns revealed using CMA-DA-DAPI staining and genome size estimations are novel contributions to the understanding of the N genome in Paspalum. Results: Chromosomes were small (1.1–2.3 µm), with the diploid karyotype comprising nine metacentric pairs (one bearing microsatellites on the short arms, pair 6) and one submetacentric pair. In tetraploids, the diploid karyotype was duplicated. Heterochromatin analysis revealed two CMA++/DAPI− bands located on the short arm and satellite of chromosome 6 in diploids, while tetraploids exhibited two to three CMA++/DAPI− and one to two CMA++/DAPI0 bands. The proportion of GC-rich heterochromatin represented 2.8 and 3.47% of the total chromosome length in diploid and tetraploid cytotypes, respectively. Genome size analysis revealed a reduction in monoploid genome size in tetraploids (1Cx = 0.678 pg) compared to diploids (1Cx = 0.71 pg), consistent with the autopolyploid origin hypothesis. Conclusions: These findings provide essential cytogenetic insights and suggest only minor structural changes in the N genome following polyploidization, which could guide future studies integrating genomic and cytogenetic maps of P. notatum.Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Reutemann, Anna Verena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Schneider, Juan Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Escobar, Lucas Mateo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Daviña, Julio Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaMDPI2025-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/271617Honfi, Ana Isabel; Reutemann, Anna Verena; Schneider, Juan Sebastián; Escobar, Lucas Mateo; Martínez, Eric Javier; et al.; Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure; MDPI; Genes; 16; 3; 2-2025; 1-202073-4425CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3390/genes16030242info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:12Zoai:ri.conicet.gov.ar:11336/271617instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:40:12.398CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
title |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
spellingShingle |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure Honfi, Ana Isabel chromosome banding patterns karyotype evolution forage grasses constitutive heterochromatin polyploid genome size |
title_short |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
title_full |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
title_fullStr |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
title_full_unstemmed |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
title_sort |
Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure |
dc.creator.none.fl_str_mv |
Honfi, Ana Isabel Reutemann, Anna Verena Schneider, Juan Sebastián Escobar, Lucas Mateo Martínez, Eric Javier Daviña, Julio Rubén |
author |
Honfi, Ana Isabel |
author_facet |
Honfi, Ana Isabel Reutemann, Anna Verena Schneider, Juan Sebastián Escobar, Lucas Mateo Martínez, Eric Javier Daviña, Julio Rubén |
author_role |
author |
author2 |
Reutemann, Anna Verena Schneider, Juan Sebastián Escobar, Lucas Mateo Martínez, Eric Javier Daviña, Julio Rubén |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
chromosome banding patterns karyotype evolution forage grasses constitutive heterochromatin polyploid genome size |
topic |
chromosome banding patterns karyotype evolution forage grasses constitutive heterochromatin polyploid genome size |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/4.5 https://purl.org/becyt/ford/4 |
dc.description.none.fl_txt_mv |
Background/Objectives: Paspalum notatum is a key multipurpose species native to American grasslands. This study provides, for the first time, a detailed karyotype analysis of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) accessions of P. notatum, the most common cytotypes within the species. Methods: The constitutive heterochromatin patterns revealed using CMA-DA-DAPI staining and genome size estimations are novel contributions to the understanding of the N genome in Paspalum. Results: Chromosomes were small (1.1–2.3 µm), with the diploid karyotype comprising nine metacentric pairs (one bearing microsatellites on the short arms, pair 6) and one submetacentric pair. In tetraploids, the diploid karyotype was duplicated. Heterochromatin analysis revealed two CMA++/DAPI− bands located on the short arm and satellite of chromosome 6 in diploids, while tetraploids exhibited two to three CMA++/DAPI− and one to two CMA++/DAPI0 bands. The proportion of GC-rich heterochromatin represented 2.8 and 3.47% of the total chromosome length in diploid and tetraploid cytotypes, respectively. Genome size analysis revealed a reduction in monoploid genome size in tetraploids (1Cx = 0.678 pg) compared to diploids (1Cx = 0.71 pg), consistent with the autopolyploid origin hypothesis. Conclusions: These findings provide essential cytogenetic insights and suggest only minor structural changes in the N genome following polyploidization, which could guide future studies integrating genomic and cytogenetic maps of P. notatum. Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Reutemann, Anna Verena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Schneider, Juan Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Escobar, Lucas Mateo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Daviña, Julio Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina |
description |
Background/Objectives: Paspalum notatum is a key multipurpose species native to American grasslands. This study provides, for the first time, a detailed karyotype analysis of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) accessions of P. notatum, the most common cytotypes within the species. Methods: The constitutive heterochromatin patterns revealed using CMA-DA-DAPI staining and genome size estimations are novel contributions to the understanding of the N genome in Paspalum. Results: Chromosomes were small (1.1–2.3 µm), with the diploid karyotype comprising nine metacentric pairs (one bearing microsatellites on the short arms, pair 6) and one submetacentric pair. In tetraploids, the diploid karyotype was duplicated. Heterochromatin analysis revealed two CMA++/DAPI− bands located on the short arm and satellite of chromosome 6 in diploids, while tetraploids exhibited two to three CMA++/DAPI− and one to two CMA++/DAPI0 bands. The proportion of GC-rich heterochromatin represented 2.8 and 3.47% of the total chromosome length in diploid and tetraploid cytotypes, respectively. Genome size analysis revealed a reduction in monoploid genome size in tetraploids (1Cx = 0.678 pg) compared to diploids (1Cx = 0.71 pg), consistent with the autopolyploid origin hypothesis. Conclusions: These findings provide essential cytogenetic insights and suggest only minor structural changes in the N genome following polyploidization, which could guide future studies integrating genomic and cytogenetic maps of P. notatum. |
publishDate |
2025 |
dc.date.none.fl_str_mv |
2025-02 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/271617 Honfi, Ana Isabel; Reutemann, Anna Verena; Schneider, Juan Sebastián; Escobar, Lucas Mateo; Martínez, Eric Javier; et al.; Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure; MDPI; Genes; 16; 3; 2-2025; 1-20 2073-4425 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/271617 |
identifier_str_mv |
Honfi, Ana Isabel; Reutemann, Anna Verena; Schneider, Juan Sebastián; Escobar, Lucas Mateo; Martínez, Eric Javier; et al.; Chromosome Morphology and Heterochromatin Patterns in Paspalum notatum: Insights into Polyploid Genome Structure; MDPI; Genes; 16; 3; 2-2025; 1-20 2073-4425 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.3390/genes16030242 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |