Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids

Breeding procedures developed for apomictic species are based on the idea of fixing superior hybrids by apomixis. However, scarce information is available about the occurrence of heterosis in apomictic hybrids. The objective was to generate a group of apomixis-segregating tetraploid bahiagrass (Pasp...

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Autores principales: Zilli, Alex Leonel, Brugnoli, Elsa Andrea, Marcón, Florencia, Billa, M. B., Ríos, Esteban Fernando, Martínez, Eric Javier, Acuña, Carlos Alberto
Formato: Artículo
Lenguaje:Inglés
Publicado: Crop Science Soc Amer 2022
Materias:
ISSR
Inter-simple sequence repeat
PCR
Polymerase chain reaction
RAPD
Random amplified polymorphic DNA
SSR
Single sequence repeat
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/47781
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-47781
record_format dspace
spelling I48-R184-123456789-477812024-10-03T12:54:34Z Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids Zilli, Alex Leonel Brugnoli, Elsa Andrea Marcón, Florencia Billa, M. B. Ríos, Esteban Fernando Martínez, Eric Javier Acuña, Carlos Alberto ISSR Inter-simple sequence repeat PCR Polymerase chain reaction RAPD Random amplified polymorphic DNA SSR Single sequence repeat Breeding procedures developed for apomictic species are based on the idea of fixing superior hybrids by apomixis. However, scarce information is available about the occurrence of heterosis in apomictic hybrids. The objective was to generate a group of apomixis-segregating tetraploid bahiagrass (Paspalum notatum Flüggé) families, evaluate the occurrence of heterosis for a series of agronomic and morphological traits, determine the level of apospory expressivity among hybrids, and estimate the genetic distance among parents and its relationship to heterosis and apospory expressivity. In total, 11 tetraploid families were generated by crossing sexual and apomitic genotypes. The segregation for mode of reproduction was analyzed using a random amplified polymorphic DNA (RAPD) marker linked to apospory in bahiagrass, and the level of apospory expressivity was determined using embryo sac observations. The genetic distances between parents were determined using inter-simple sequence repeat (ISSR) markers. The ratio between sexual and aposporic hybrids varied from 1:1 to 7:1 among families. Discontinuous variation for apospory expressivity was observed in the hybrids, with either low or high levels being exhibited. Midparent, high-parent, and standard heterosis was observed for all evaluated characteristics. The level of heterosis was dependent on the combination of parents involved and also on the specific trait. There was a low correlation between genetic distances among parents and initial growth and the level of apospory expressivity. The occurrence of heterosis and the segregation and expressivity for apospory were highly dependent on the combination of sexual and apomictic parents. 2022-05-19T14:38:52Z 2022-05-19T14:38:52Z 2015 Artículo Zilli, Alex Leonel, et al., 2015. Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids. Crop Sciencie. Baltimore: Crop Science Soc Amer, vol. 55, p. 1189-1201. E-ISSN 1435-0653. 0011-183X http://repositorio.unne.edu.ar/handle/123456789/47781 eng https://acsess.onlinelibrary.wiley.com/doi/10.2135/cropsci2014.10.0685 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Crop Science Soc Amer Source Crop Sciencie, 2015, vol. 55, p. 1189-1201.
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 ISSR
Inter-simple sequence repeat
PCR
Polymerase chain reaction
RAPD
Random amplified polymorphic DNA
SSR
Single sequence repeat
spellingShingle ISSR
Inter-simple sequence repeat
PCR
Polymerase chain reaction
RAPD
Random amplified polymorphic DNA
SSR
Single sequence repeat
Zilli, Alex Leonel
Brugnoli, Elsa Andrea
Marcón, Florencia
Billa, M. B.
Ríos, Esteban Fernando
Martínez, Eric Javier
Acuña, Carlos Alberto
Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
topic_facet ISSR
Inter-simple sequence repeat
PCR
Polymerase chain reaction
RAPD
Random amplified polymorphic DNA
SSR
Single sequence repeat
description Breeding procedures developed for apomictic species are based on the idea of fixing superior hybrids by apomixis. However, scarce information is available about the occurrence of heterosis in apomictic hybrids. The objective was to generate a group of apomixis-segregating tetraploid bahiagrass (Paspalum notatum Flüggé) families, evaluate the occurrence of heterosis for a series of agronomic and morphological traits, determine the level of apospory expressivity among hybrids, and estimate the genetic distance among parents and its relationship to heterosis and apospory expressivity. In total, 11 tetraploid families were generated by crossing sexual and apomitic genotypes. The segregation for mode of reproduction was analyzed using a random amplified polymorphic DNA (RAPD) marker linked to apospory in bahiagrass, and the level of apospory expressivity was determined using embryo sac observations. The genetic distances between parents were determined using inter-simple sequence repeat (ISSR) markers. The ratio between sexual and aposporic hybrids varied from 1:1 to 7:1 among families. Discontinuous variation for apospory expressivity was observed in the hybrids, with either low or high levels being exhibited. Midparent, high-parent, and standard heterosis was observed for all evaluated characteristics. The level of heterosis was dependent on the combination of parents involved and also on the specific trait. There was a low correlation between genetic distances among parents and initial growth and the level of apospory expressivity. The occurrence of heterosis and the segregation and expressivity for apospory were highly dependent on the combination of sexual and apomictic parents.
format Artículo
author Zilli, Alex Leonel
Brugnoli, Elsa Andrea
Marcón, Florencia
Billa, M. B.
Ríos, Esteban Fernando
Martínez, Eric Javier
Acuña, Carlos Alberto
author_facet Zilli, Alex Leonel
Brugnoli, Elsa Andrea
Marcón, Florencia
Billa, M. B.
Ríos, Esteban Fernando
Martínez, Eric Javier
Acuña, Carlos Alberto
author_sort Zilli, Alex Leonel
title Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
title_short Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
title_full Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
title_fullStr Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
title_full_unstemmed Heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
title_sort heterosis and expressivity of apospory in tetraploid bahiagrass hybrids
publisher Crop Science Soc Amer
publishDate 2022
url http://repositorio.unne.edu.ar/handle/123456789/47781
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