Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding

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Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed...

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Autores principales: Novo, Patricia Elda, Montenegro Valls, José Francisco, Galdeano, Florencia, Honfi, Ana Isabel, Espinoza, Francisco, Quarin, Camilo Luis
Formato: Artículo
Lenguaje:Inglés
Publicado: Universidade de São Paulo 2021
Materias:
DNA content
Apomixis
Fertility
Meiosis
Reproductive Mode
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28598
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28598
record_format dspace
spelling I48-R184-123456789-285982024-02-15T12:10:05Z Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding Novo, Patricia Elda Montenegro Valls, José Francisco Galdeano, Florencia Honfi, Ana Isabel Espinoza, Francisco Quarin, Camilo Luis DNA content Apomixis Fertility Meiosis Reproductive Mode Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed) tetraploid, sporadically cultivated in Pantanal farms, either propagated by cuttings or seed. Due to its potential for extensive cultivation and its forage quality, it appears as a good candidate for genetic improvement within the Plicatula group through plant breeding. Taking advantage of a colchicine-induced sexual autotetraploid genotype of P. plicatulum Michx. we obtained interspecific hybrids by using the apomictic species, P. oteroi, as pollen donor. The very similar meiotic chromosome behavior observed in both parents, with mainly quadrivalent and bivalent associations, suggested that P. oteroi is a natural autotetraploid. The hybrids showed less irregular meiotic behavior with fewer quadrivalents and more bivalents than either parent. The fertility among interspecific hybrids varied from complete sterility in some of them, to seed productions in others that were approximately twice as much as for either parent. The great variability of seed set performance may well be a drastic genetic consequence of joining two homologous chromosome sets of P. plicatulum together with two homologous sets of P. oteroi which in turn have some homeology between them. Because most hybrids reproduce by mean of sexuality, they could be used as female parents in backcrosses and in crosses with other species of the Plicatula group for interspecific gene transferring in breeding programs. 2021-09-08T11:55:05Z 2021-09-08T11:55:05Z 2016-08 Artículo Novo, Patricia Elda, et al., 2016. Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding. Scientia Agricola. São Paulo: Universidade de São Paulo, vol. 73, no. 4, p. 356-362. ISSN 0103-9016. 0103-9016 http://repositorio.unne.edu.ar/handle/123456789/28598 eng http://dx.doi.org/10.1590/0103-9016-2015-0218 http://ref.scielo.org/w2pjg9 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Universidade de São Paulo vol. 73, no. 4, p. 356-362.
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 DNA content
Apomixis
Fertility
Meiosis
Reproductive Mode
spellingShingle DNA content
Apomixis
Fertility
Meiosis
Reproductive Mode
Novo, Patricia Elda
Montenegro Valls, José Francisco
Galdeano, Florencia
Honfi, Ana Isabel
Espinoza, Francisco
Quarin, Camilo Luis
Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
topic_facet DNA content
Apomixis
Fertility
Meiosis
Reproductive Mode
description Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed) tetraploid, sporadically cultivated in Pantanal farms, either propagated by cuttings or seed. Due to its potential for extensive cultivation and its forage quality, it appears as a good candidate for genetic improvement within the Plicatula group through plant breeding. Taking advantage of a colchicine-induced sexual autotetraploid genotype of P. plicatulum Michx. we obtained interspecific hybrids by using the apomictic species, P. oteroi, as pollen donor. The very similar meiotic chromosome behavior observed in both parents, with mainly quadrivalent and bivalent associations, suggested that P. oteroi is a natural autotetraploid. The hybrids showed less irregular meiotic behavior with fewer quadrivalents and more bivalents than either parent. The fertility among interspecific hybrids varied from complete sterility in some of them, to seed productions in others that were approximately twice as much as for either parent. The great variability of seed set performance may well be a drastic genetic consequence of joining two homologous chromosome sets of P. plicatulum together with two homologous sets of P. oteroi which in turn have some homeology between them. Because most hybrids reproduce by mean of sexuality, they could be used as female parents in backcrosses and in crosses with other species of the Plicatula group for interspecific gene transferring in breeding programs.
format Artículo
author Novo, Patricia Elda
Montenegro Valls, José Francisco
Galdeano, Florencia
Honfi, Ana Isabel
Espinoza, Francisco
Quarin, Camilo Luis
author_facet Novo, Patricia Elda
Montenegro Valls, José Francisco
Galdeano, Florencia
Honfi, Ana Isabel
Espinoza, Francisco
Quarin, Camilo Luis
author_sort Novo, Patricia Elda
title Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
title_short Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
title_full Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
title_fullStr Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
title_full_unstemmed Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
title_sort interspecific hybrids between paspalum plicatulum and p. oteroi: a key tool for forage breeding
publisher Universidade de São Paulo
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28598
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