Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum

Paspalum rufum Nees is a perennial grass that forms a multiploid complex. Natural populations are composed mainly of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) cytotypes. The diploid form is sexual and highly self-sterile, while the tetraploid is pseudogamous aposporous apomict and self-fe...

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Autores principales: Delgado, Luciana, Sartor, María Esperanza, Espinoza, Francisco, Soliman, Mariano, Galdeano, Florencia, Ortíz, Juan Pablo Amelio
Formato: Artículo
Lenguaje:Inglés
Publicado: Springer Wien 2022
Materias:
Apospory expressivity
Diploid
Paspalum rufum
Polyploid
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/47960
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-47960
record_format dspace
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 Apospory expressivity
Diploid
Paspalum rufum
Polyploid
spellingShingle Apospory expressivity
Diploid
Paspalum rufum
Polyploid
Delgado, Luciana
Sartor, María Esperanza
Espinoza, Francisco
Soliman, Mariano
Galdeano, Florencia
Ortíz, Juan Pablo Amelio
Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
topic_facet Apospory expressivity
Diploid
Paspalum rufum
Polyploid
description Paspalum rufum Nees is a perennial grass that forms a multiploid complex. Natural populations are composed mainly of diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) cytotypes. The diploid form is sexual and highly self-sterile, while the tetraploid is pseudogamous aposporous apomict and self-fertile. Diploids can also develop aposporous sacs, and some of them complete apomixis. The objective of this work was to analyse napospory expressivity (a gametophytic apomixis component) in diploid hybrids and colchicine-induced autotetraploids of the species. One F1 family was created by crossing two diploid individuals (R6#45 9 R5#49) carrying aposporous sacs in 5.8 and 13 % of their ovules,respectively. Moreover, two synthetic autotetraploids were obtained by colchicine treatment of mature seeds from R6#45. The hybrid origin of the F1s was confirmed by segregation analyses of a morphological trait and molecularmarkers, and the ploidy level of experimental plants was determined by flow cytometry. Apospory expressivitywas estimated by embryo sacs observation at anthesis. Out of the 39 hybrids analysed, 38 showed aposporous embryo sacs. Expressivity of the trait ranged from 0 to 36 %, andsome individuals differed significantly for both progenitors’ values. Both doubled-diploid plants showed 25 and 32 % of apospory expressivity, which was significantly higher than that observed in R6#45. Results presented inthis work revealed a high variability in apospory expressivity of diploid hybrids and suggested that more than one allele are controlling the trait. Moreover, the new induced doubled-diploid plants showed that apospory expressivity is highly ploidy dependent.
format Artículo
author Delgado, Luciana
Sartor, María Esperanza
Espinoza, Francisco
Soliman, Mariano
Galdeano, Florencia
Ortíz, Juan Pablo Amelio
author_facet Delgado, Luciana
Sartor, María Esperanza
Espinoza, Francisco
Soliman, Mariano
Galdeano, Florencia
Ortíz, Juan Pablo Amelio
author_sort Delgado, Luciana
title Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
title_short Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
title_full Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
title_fullStr Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
title_full_unstemmed Hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
title_sort hybridity and autopolyploidy increase the expressivity of apospory in diploid paspalum rufum
publisher Springer Wien
publishDate 2022
url http://repositorio.unne.edu.ar/handle/123456789/47960
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