Diversity in apomictic populations of Paspalum simplex Morong

Paspalum is considered a genetic model for studying the sources of genotypic variability and breeding techniques in apomictic plants. Pas­palum simplex is a warm-season forage grass that well represents the genus since it contains different ploidy levels and apomixis is linked to polyploidy. The obj...

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Autores principales: Brugnoli, Elsa Andrea, Urbani, Mario Hugo, Quarin, Camilo Luis, Zilli, Alex Leonel, Martínez, Eric Javier, Acuña, Carlos Alberto
Formato: Artículo
Lenguaje:Inglés
Publicado: Crop Science Soc Amer 2023
Materias:
Paspalum simplex
Apomictic plants
Polyploid populations
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/51993
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-51993
record_format dspace
spelling I48-R184-123456789-519932024-09-30T13:24:29Z Diversity in apomictic populations of Paspalum simplex Morong Brugnoli, Elsa Andrea Urbani, Mario Hugo Quarin, Camilo Luis Zilli, Alex Leonel Martínez, Eric Javier Acuña, Carlos Alberto Paspalum simplex Apomictic plants Polyploid populations Paspalum is considered a genetic model for studying the sources of genotypic variability and breeding techniques in apomictic plants. Pas­palum simplex is a warm-season forage grass that well represents the genus since it contains different ploidy levels and apomixis is linked to polyploidy. The objective was to evaluate the diversity present within and among apomictic polyploid populations of P. simplex. Germplasm was collected from 17 sites covering the spe­cies’ region of natural distribution. The diversity present at the molecular level within and among populations was evaluated using ISSR markers. Variability for agronomic traits was also evalu­ated by cultivating all populations into the field. The 17 analyzed populations were all polyploid, including 13 pure tetraploid, and 4 mixed tetra­ploid-hexaploid with predominance of the tetra­ploid cytotype. Most of the diversity was pres­ent among polyploid populations (85% of the total variation), and there was not a correlation between genetic and geographical distances. The within-population diversity was low for most populations with the exception of one of them. Each genotype was restricted to a single loca­tion. Variability for initial growth, spring and fall growth, and the extent of the vegetative phase was observed within and among polyploid popu­lations. The within-population variation for these phenotypic traits was mainly due to the presence of one or a few off-type plants. A highly geno­type-specific colonization of new sites appears to occur in P. simplex, and then apomixis medi­ates the formation of uniform populations. 2023-08-04T12:10:00Z 2023-08-04T12:10:00Z 2014 Artículo Brugnoli, Elsa Andrea, et al., 2014. Diversity in apomictic populations of Paspalum simplex Morong. Crop Sciencie. Baltimore: Crop Science Soc Amer, vol. 54, p. 1656-1664. E-ISSN 1435-1653. http://repositorio.unne.edu.ar/handle/123456789/51993 eng https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2135/cropsci2013.11.0780 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 1656-1664 application/pdf Crop Science Soc Amer Crop Sciencie, 2014, vol. 54, p. 1656-1664.
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 Paspalum simplex
Apomictic plants
Polyploid populations
spellingShingle Paspalum simplex
Apomictic plants
Polyploid populations
Brugnoli, Elsa Andrea
Urbani, Mario Hugo
Quarin, Camilo Luis
Zilli, Alex Leonel
Martínez, Eric Javier
Acuña, Carlos Alberto
Diversity in apomictic populations of Paspalum simplex Morong
topic_facet Paspalum simplex
Apomictic plants
Polyploid populations
description Paspalum is considered a genetic model for studying the sources of genotypic variability and breeding techniques in apomictic plants. Pas­palum simplex is a warm-season forage grass that well represents the genus since it contains different ploidy levels and apomixis is linked to polyploidy. The objective was to evaluate the diversity present within and among apomictic polyploid populations of P. simplex. Germplasm was collected from 17 sites covering the spe­cies’ region of natural distribution. The diversity present at the molecular level within and among populations was evaluated using ISSR markers. Variability for agronomic traits was also evalu­ated by cultivating all populations into the field. The 17 analyzed populations were all polyploid, including 13 pure tetraploid, and 4 mixed tetra­ploid-hexaploid with predominance of the tetra­ploid cytotype. Most of the diversity was pres­ent among polyploid populations (85% of the total variation), and there was not a correlation between genetic and geographical distances. The within-population diversity was low for most populations with the exception of one of them. Each genotype was restricted to a single loca­tion. Variability for initial growth, spring and fall growth, and the extent of the vegetative phase was observed within and among polyploid popu­lations. The within-population variation for these phenotypic traits was mainly due to the presence of one or a few off-type plants. A highly geno­type-specific colonization of new sites appears to occur in P. simplex, and then apomixis medi­ates the formation of uniform populations.
format Artículo
author Brugnoli, Elsa Andrea
Urbani, Mario Hugo
Quarin, Camilo Luis
Zilli, Alex Leonel
Martínez, Eric Javier
Acuña, Carlos Alberto
author_facet Brugnoli, Elsa Andrea
Urbani, Mario Hugo
Quarin, Camilo Luis
Zilli, Alex Leonel
Martínez, Eric Javier
Acuña, Carlos Alberto
author_sort Brugnoli, Elsa Andrea
title Diversity in apomictic populations of Paspalum simplex Morong
title_short Diversity in apomictic populations of Paspalum simplex Morong
title_full Diversity in apomictic populations of Paspalum simplex Morong
title_fullStr Diversity in apomictic populations of Paspalum simplex Morong
title_full_unstemmed Diversity in apomictic populations of Paspalum simplex Morong
title_sort diversity in apomictic populations of paspalum simplex morong
publisher Crop Science Soc Amer
publishDate 2023
url http://repositorio.unne.edu.ar/handle/123456789/51993
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