Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)

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Interspecific Crossing was conducted between diploid cytotypes of two Paspalum species o f the subgenus Anachyris in order to investígate their genomic relatíonship and to evalúate the possibilities of gene exchange between these species as a tool for their genetic improvement. Paspalum simplex was...

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Autores principales: Espinoza, Francisco, Quarín, Camilo L.
Formato: Artículo
Lenguaje:Español
Publicado: Instituto de Botánica Darwinion 2025
Materias:
Híbridos interespecíficos
Paspalum simplex
Paspalum procurrens
Paniceae
Interspecific hybrids
Poaceae
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/58283
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-58283
record_format dspace
spelling I48-R184-123456789-582832025-08-28T13:59:24Z Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae) Espinoza, Francisco Quarín, Camilo L. Híbridos interespecíficos Paspalum simplex Paspalum procurrens Paniceae Interspecific hybrids Paspalum simplex Paspalum procurrens Paniceae Poaceae Interspecific Crossing was conducted between diploid cytotypes of two Paspalum species o f the subgenus Anachyris in order to investígate their genomic relatíonship and to evalúate the possibilities of gene exchange between these species as a tool for their genetic improvement. Paspalum simplex was the female parent. The Ft hybrids showed stoloniferous growth habit which is characteristíc of the male parent, P. procurrens. Regular meiotic behavior in the F, hybrids demonstrated that both species have significant homology in their genomes. Embryological studies and seed production analysis under self and cross-pollinated conditions demonstrated that the hybrids, like their parents, are sexual and selfsterile but cross-compatible. Both, the high level of crossabitity o f the parents and the degree of fertility observed in hybrids and in backcross progenies, indicated the feasibility of gene exchange between these species. Morphologically, P. simplex and P. procurrens are easily recognized as different species. Notwithstanding, the high crossability and the high level o f fertility observed in hybrids and backcrossed progenies contrast with the lack of intermedíate forms observed in herbaria and during field trips. Diploid cytotypes of both species seem to be restricted to western arcas of the phytogeographic Chaco province, from Bolivia to Argentina. However, divergent evolution likely occurred in correlation with latitude and specific soil requirements. Diploid P. simplex was found in the southwestem Chaco province on clayey soil while P. procurrens was collected in the northwest o f the province, growing on sandy soil. 2025-08-28T13:36:54Z 2025-08-28T13:36:54Z 1998-09-25 Artículo Espinoza, Francisco y Quarín, Camilo L., 1998. Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae). Darwiniana, nueva serie. Buenos Aires: Instituto de Botánica Darwinion, vol. 36, no. 1-4, p. 59-63. ISSN 0011-6793. 0011-6793 http://repositorio.unne.edu.ar/handle/123456789/58283 spa https://www.ojs.darwin.edu.ar/index.php/darwiniana/article/view/342 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 59-63 application/pdf Instituto de Botánica Darwinion Darwiniana, nueva serie, 1998, vol. 36, no. 1-4, p. 59-63.
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 Español
topic Híbridos interespecíficos
Paspalum simplex
Paspalum procurrens
Paniceae
Interspecific hybrids
Paspalum simplex
Paspalum procurrens
Paniceae
Poaceae
spellingShingle Híbridos interespecíficos
Paspalum simplex
Paspalum procurrens
Paniceae
Interspecific hybrids
Paspalum simplex
Paspalum procurrens
Paniceae
Poaceae
Espinoza, Francisco
Quarín, Camilo L.
Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
topic_facet Híbridos interespecíficos
Paspalum simplex
Paspalum procurrens
Paniceae
Interspecific hybrids
Paspalum simplex
Paspalum procurrens
Paniceae
Poaceae
description Interspecific Crossing was conducted between diploid cytotypes of two Paspalum species o f the subgenus Anachyris in order to investígate their genomic relatíonship and to evalúate the possibilities of gene exchange between these species as a tool for their genetic improvement. Paspalum simplex was the female parent. The Ft hybrids showed stoloniferous growth habit which is characteristíc of the male parent, P. procurrens. Regular meiotic behavior in the F, hybrids demonstrated that both species have significant homology in their genomes. Embryological studies and seed production analysis under self and cross-pollinated conditions demonstrated that the hybrids, like their parents, are sexual and selfsterile but cross-compatible. Both, the high level of crossabitity o f the parents and the degree of fertility observed in hybrids and in backcross progenies, indicated the feasibility of gene exchange between these species. Morphologically, P. simplex and P. procurrens are easily recognized as different species. Notwithstanding, the high crossability and the high level o f fertility observed in hybrids and backcrossed progenies contrast with the lack of intermedíate forms observed in herbaria and during field trips. Diploid cytotypes of both species seem to be restricted to western arcas of the phytogeographic Chaco province, from Bolivia to Argentina. However, divergent evolution likely occurred in correlation with latitude and specific soil requirements. Diploid P. simplex was found in the southwestem Chaco province on clayey soil while P. procurrens was collected in the northwest o f the province, growing on sandy soil.
format Artículo
author Espinoza, Francisco
Quarín, Camilo L.
author_facet Espinoza, Francisco
Quarín, Camilo L.
author_sort Espinoza, Francisco
title Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
title_short Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
title_full Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
title_fullStr Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
title_full_unstemmed Relación genómica entre citotipos diploides de Paspalum simplex y P. procurrens (Poaceae, Paniceae)
title_sort relación genómica entre citotipos diploides de paspalum simplex y p. procurrens (poaceae, paniceae)
publisher Instituto de Botánica Darwinion
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/58283
work_keys_str_mv AT espinozafrancisco relaciongenomicaentrecitotiposdiploidesdepaspalumsimplexypprocurrenspoaceaepaniceae
AT quarincamilol relaciongenomicaentrecitotiposdiploidesdepaspalumsimplexypprocurrenspoaceaepaniceae
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