rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)

Most species of the genus Arachis (Leguminosae; 80 spp.) are diploid with x = 10 and only four species have x = 9 chromosomes. Three of these x = 9 species belong to section Arachis and are morphologically and chromosomally similar. To study the homeology of the genomes of x = 9 species and the...

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Autores principales: Silvestri, María Celeste, Ortíz, Alejandra Marcela, Lavia, Graciela Inés
Formato: Artículo
Lenguaje:Inglés
Publicado: Springer 2022
Materias:
Chromosomes
Fish genome type
rDNA sites
x = 9 species of section Arachis
Dapi bands
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/30747
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-30747
record_format dspace
spelling I48-R184-123456789-307472025-03-06T10:58:04Z rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae) Silvestri, María Celeste Ortíz, Alejandra Marcela Lavia, Graciela Inés Chromosomes Fish genome type rDNA sites x = 9 species of section Arachis Dapi bands Most species of the genus Arachis (Leguminosae; 80 spp.) are diploid with x = 10 and only four species have x = 9 chromosomes. Three of these x = 9 species belong to section Arachis and are morphologically and chromosomally similar. To study the homeology of the genomes of x = 9 species and their relation to other genomes in section Arachis, we applied fluorescence in situ hybridization (FISH) of 18S–26S and 5S rDNA and 40,6- diamidino-2-phenylindole (DAPI) banding. FISH revealed for these three species one pair of 5S rDNA sites interstitially within the short arm of the metacentric pair 6 and one pair of 18S–26S rDNA sites in the proximal region of the long arm of the SAT chromosomes. Conspicuous DAPI? bands were detected pericentromerically in all nine chromosome pairs of A. decora and A. praecox and in all but one pair of A. palustris. Our results suggest that all three species with x = 9 of section Arachis share the same genome type and are different from the other genome types A, B, D, F, and K described for this section. Apparently, the x = 9 species of section Arachis form a monophyletic group characterized by a genome type, that we propose to call G genome. 2022-02-04T12:59:09Z 2022-02-04T12:59:09Z 2014 Artículo Silvestri, María Celeste, Ortíz, Alejandra Marcela y Lavia, Graciela Inés, 2014. rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae). Plant Systematics and Evolution. Heidelberg: Springer, vol. 301, no. 2, p. 555-562. ISSN 0378-2697. 0378-2697 http://repositorio.unne.edu.ar/handle/123456789/30747 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Springer Plant Systematics and Evolution, 2014, vol. 301, no. 2, p. 555-562.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Chromosomes
Fish genome type
rDNA sites
x = 9 species of section Arachis
Dapi bands
spellingShingle Chromosomes
Fish genome type
rDNA sites
x = 9 species of section Arachis
Dapi bands
Silvestri, María Celeste
Ortíz, Alejandra Marcela
Lavia, Graciela Inés
rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
topic_facet Chromosomes
Fish genome type
rDNA sites
x = 9 species of section Arachis
Dapi bands
description Most species of the genus Arachis (Leguminosae; 80 spp.) are diploid with x = 10 and only four species have x = 9 chromosomes. Three of these x = 9 species belong to section Arachis and are morphologically and chromosomally similar. To study the homeology of the genomes of x = 9 species and their relation to other genomes in section Arachis, we applied fluorescence in situ hybridization (FISH) of 18S–26S and 5S rDNA and 40,6- diamidino-2-phenylindole (DAPI) banding. FISH revealed for these three species one pair of 5S rDNA sites interstitially within the short arm of the metacentric pair 6 and one pair of 18S–26S rDNA sites in the proximal region of the long arm of the SAT chromosomes. Conspicuous DAPI? bands were detected pericentromerically in all nine chromosome pairs of A. decora and A. praecox and in all but one pair of A. palustris. Our results suggest that all three species with x = 9 of section Arachis share the same genome type and are different from the other genome types A, B, D, F, and K described for this section. Apparently, the x = 9 species of section Arachis form a monophyletic group characterized by a genome type, that we propose to call G genome.
format Artículo
author Silvestri, María Celeste
Ortíz, Alejandra Marcela
Lavia, Graciela Inés
author_facet Silvestri, María Celeste
Ortíz, Alejandra Marcela
Lavia, Graciela Inés
author_sort Silvestri, María Celeste
title rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
title_short rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
title_full rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
title_fullStr rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
title_full_unstemmed rDNA loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
title_sort rdna loci and heterochromatin positions support a distinct genome type for ‘x = 9 species’ of section arachis (arachis, leguminosae)
publisher Springer
publishDate 2022
url http://repositorio.unne.edu.ar/handle/123456789/30747
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AT ortizalejandramarcela rdnalociandheterochromatinpositionssupportadistinctgenometypeforx9speciesofsectionarachisarachisleguminosae
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