Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)

Rhizomatosae is a taxonomic section of the South American genus Arachis, whose diagnostic character is the presence of rhizomes in all its species. This section is of particular evolutionary interest because it has three polyploid (A. pseudovillosa, A. nitida and A. glabrata, 2n = 4x = 40) and only...

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Autores principales:	Ortíz, Alejandra Marcela, Robledo Dobladez, Germán Ariel, Seijo, José Guillermo, Montenegro Valls, José Francisco, Lavia, Graciela Inés
Formato:	Artículo
Lenguaje:	Inglés
Publicado:	The Botanical Society of Japan 2021
Materias:	Arachis Evolutionary relationships Heterochromatin Karyotype Rhizomatosae rDNA loci
Acceso en línea:	http://repositorio.unne.edu.ar/handle/123456789/30228
Aporte de:	RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste

id	I48-R184-123456789-30228
record_format	dspace
spelling	I48-R184-123456789-302282025-03-06T10:57:15Z Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae) Ortíz, Alejandra Marcela Robledo Dobladez, Germán Ariel Seijo, José Guillermo Montenegro Valls, José Francisco Lavia, Graciela Inés Arachis Evolutionary relationships Heterochromatin Karyotype Rhizomatosae rDNA loci Rhizomatosae is a taxonomic section of the South American genus Arachis, whose diagnostic character is the presence of rhizomes in all its species. This section is of particular evolutionary interest because it has three polyploid (A. pseudovillosa, A. nitida and A. glabrata, 2n = 4x = 40) and only one diploid (A. burkartii, 2n = 2x = 20) species. The phylogenetic relationships of these species as well as the polyploidy nature and the origin of the tetraploids are still controversial. The present study provides an exhaustive analysis of the karyotypes of all rhizomatous species and six closely related diploid species of the sections Erectoides and Procumbentes by cytogenetic mapping of DAPI/CMA heterochromatin bands and 5S and 18-26S rDNA loci. Chromosome banding showed variation in the DAPI heterochromatin distribution pattern, which, together with the number and distribution of rDNA loci, allowed the characterization of all species studied here. The bulk of chromosomal markers suggest that the three rhizomatous tetraploid species constitute a natural group and may have at least one common diploid ancestor. The cytogenetic data of the diploid species analyzed evidenced that the only rhizomatous diploid species-A. burkartii-has a karyotype pattern different from those of the rhizomatous tetraploids, showing that it is not likely the genome donor of the tetraploids and the non-monophyletic nature of the section Rhizomatosae. Thus, the tetraploid species should be excluded from the R genome, which should remain exclusively for A. burkartii. Instead, the karyotype features of these tetraploids are compatible with those of different species of the sections Erectoides and Procumbentes (E genome species), suggesting the hypothesis of multiple origins of these tetraploids. In addition, the polyploid nature and the group of diploid species closer to the tetraploids are discussed. 2021-11-25T15:29:37Z 2021-11-25T15:29:37Z 2017 Artículo Ortíz, Alejandra Marcela, et al., 2011. Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae). Journal of Plant Research. Tokyo: The Botanical Society of Japan, vol. 130, no. 5, p. 791-807. ISSN 0918-9440. 0918-9440 http://repositorio.unne.edu.ar/handle/123456789/30228 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf The Botanical Society of Japan Journal of Plant Research, 2017, vol. 130, no. 5, p. 791-807.
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	Arachis Evolutionary relationships Heterochromatin Karyotype Rhizomatosae rDNA loci
spellingShingle	Arachis Evolutionary relationships Heterochromatin Karyotype Rhizomatosae rDNA loci Ortíz, Alejandra Marcela Robledo Dobladez, Germán Ariel Seijo, José Guillermo Montenegro Valls, José Francisco Lavia, Graciela Inés Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
topic_facet	Arachis Evolutionary relationships Heterochromatin Karyotype Rhizomatosae rDNA loci
description	Rhizomatosae is a taxonomic section of the South American genus Arachis, whose diagnostic character is the presence of rhizomes in all its species. This section is of particular evolutionary interest because it has three polyploid (A. pseudovillosa, A. nitida and A. glabrata, 2n = 4x = 40) and only one diploid (A. burkartii, 2n = 2x = 20) species. The phylogenetic relationships of these species as well as the polyploidy nature and the origin of the tetraploids are still controversial. The present study provides an exhaustive analysis of the karyotypes of all rhizomatous species and six closely related diploid species of the sections Erectoides and Procumbentes by cytogenetic mapping of DAPI/CMA heterochromatin bands and 5S and 18-26S rDNA loci. Chromosome banding showed variation in the DAPI heterochromatin distribution pattern, which, together with the number and distribution of rDNA loci, allowed the characterization of all species studied here. The bulk of chromosomal markers suggest that the three rhizomatous tetraploid species constitute a natural group and may have at least one common diploid ancestor. The cytogenetic data of the diploid species analyzed evidenced that the only rhizomatous diploid species-A. burkartii-has a karyotype pattern different from those of the rhizomatous tetraploids, showing that it is not likely the genome donor of the tetraploids and the non-monophyletic nature of the section Rhizomatosae. Thus, the tetraploid species should be excluded from the R genome, which should remain exclusively for A. burkartii. Instead, the karyotype features of these tetraploids are compatible with those of different species of the sections Erectoides and Procumbentes (E genome species), suggesting the hypothesis of multiple origins of these tetraploids. In addition, the polyploid nature and the group of diploid species closer to the tetraploids are discussed.
format	Artículo
author	Ortíz, Alejandra Marcela Robledo Dobladez, Germán Ariel Seijo, José Guillermo Montenegro Valls, José Francisco Lavia, Graciela Inés
author_facet	Ortíz, Alejandra Marcela Robledo Dobladez, Germán Ariel Seijo, José Guillermo Montenegro Valls, José Francisco Lavia, Graciela Inés
author_sort	Ortíz, Alejandra Marcela
title	Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
title_short	Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
title_full	Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
title_fullStr	Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
title_full_unstemmed	Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
title_sort	cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
publisher	The Botanical Society of Japan
publishDate	2021
url	http://repositorio.unne.edu.ar/handle/123456789/30228
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Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)

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