Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum
- Autores
- Ferrari Usandizaga, Silvana Consuelo; Martínez, Eric Javier; Schedler, Mara; Honfi, Ana I.; Acuña, Carlos Alberto
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión aceptada
- Descripción
- Acroceras macrum Stapf is a high-quality C3 grass species adapted to the subtropics. It is a valuable forage resource in frequently flooded environments. The objectives were to analyze the type of polyploidy, mode of reproduction, and estimate seed and pollen fertility. A living collection of 22 tetraploid and five hexaploid genotypes of A. macrum was analyzed. Type of polyploidy was analyzed from chromosomal pairing at diakinesis and prometaphase I, and meiotic irregularities were evaluated during the microsporogenesis. Pollen viability was also examined. Bivalents predominated in tetraploids and trivalents in hexaploids. Meiotic abnormalities were more frequent in hexaploids than in tetraploids, and they were mainly related to mechanisms of chromosome nondisjunction. The reproductive mode was determined by cytological analysis of megasporogenesis and megagametogenesis, seed fertility under different pollination methods, and molecular progeny tests. In both tetraploid and hexaploid races, only the development of single meiotically derived embryo sacs was observed. Greater seed production in outcrossing compared with selfing indicated a primarily allogamous matting system. Progenies from crosses between genetically different tetraploid genotypes amplified male-specific molecular markers, indicating a hybrid origin and solid evidence of sexual reproduction. Population breeding approaches developed for sexual cross-pollinated species are suited for improving A. macrum.
EEA Corrientes
Fil: Ferrari Usandizaga, Silvana Consuelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Corrientes; Argentina
Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Schedler, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Honfi, Ana I. Universidad Nacional de Misiones. Instituto de Biología Subtropical nodo Posadas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical nodo Posadas; Argentina
Fil: Acuña, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina - Fuente
- Crop Science : 1-22 (January 2020)
- Materia
-
Acroceras macrum
Gramineas
Cromosomas
Meiosis
Genotipos
Grasses
Chromosomes
Genotypes
Pasto del Nilo
Nile Grass - Nivel de accesibilidad
- acceso restringido
- Condiciones de uso
- Repositorio
- Institución
- Instituto Nacional de Tecnología Agropecuaria
- OAI Identificador
- oai:localhost:20.500.12123/6777
Ver los metadatos del registro completo
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Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrumFerrari Usandizaga, Silvana ConsueloMartínez, Eric JavierSchedler, MaraHonfi, Ana I.Acuña, Carlos AlbertoAcroceras macrumGramineasCromosomasMeiosisGenotiposGrassesChromosomesGenotypesPasto del NiloNile GrassAcroceras macrum Stapf is a high-quality C3 grass species adapted to the subtropics. It is a valuable forage resource in frequently flooded environments. The objectives were to analyze the type of polyploidy, mode of reproduction, and estimate seed and pollen fertility. A living collection of 22 tetraploid and five hexaploid genotypes of A. macrum was analyzed. Type of polyploidy was analyzed from chromosomal pairing at diakinesis and prometaphase I, and meiotic irregularities were evaluated during the microsporogenesis. Pollen viability was also examined. Bivalents predominated in tetraploids and trivalents in hexaploids. Meiotic abnormalities were more frequent in hexaploids than in tetraploids, and they were mainly related to mechanisms of chromosome nondisjunction. The reproductive mode was determined by cytological analysis of megasporogenesis and megagametogenesis, seed fertility under different pollination methods, and molecular progeny tests. In both tetraploid and hexaploid races, only the development of single meiotically derived embryo sacs was observed. Greater seed production in outcrossing compared with selfing indicated a primarily allogamous matting system. Progenies from crosses between genetically different tetraploid genotypes amplified male-specific molecular markers, indicating a hybrid origin and solid evidence of sexual reproduction. Population breeding approaches developed for sexual cross-pollinated species are suited for improving A. macrum.EEA CorrientesFil: Ferrari Usandizaga, Silvana Consuelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Corrientes; ArgentinaFil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Schedler, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Honfi, Ana I. Universidad Nacional de Misiones. Instituto de Biología Subtropical nodo Posadas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical nodo Posadas; ArgentinaFil: Acuña, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaWileyinfo:eu-repo/date/embargoEnd/2021-02-172020-02-17T13:27:00Z2020-02-17T13:27:00Z2020-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20081http://hdl.handle.net/20.500.12123/67770011-183X1435-0653https://doi.org/10.1002/csc2.20081Crop Science : 1-22 (January 2020)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-09-29T13:44:52Zoai:localhost:20.500.12123/6777instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:53.151INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse |
dc.title.none.fl_str_mv |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
title |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
spellingShingle |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum Ferrari Usandizaga, Silvana Consuelo Acroceras macrum Gramineas Cromosomas Meiosis Genotipos Grasses Chromosomes Genotypes Pasto del Nilo Nile Grass |
title_short |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
title_full |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
title_fullStr |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
title_full_unstemmed |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
title_sort |
Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum |
dc.creator.none.fl_str_mv |
Ferrari Usandizaga, Silvana Consuelo Martínez, Eric Javier Schedler, Mara Honfi, Ana I. Acuña, Carlos Alberto |
author |
Ferrari Usandizaga, Silvana Consuelo |
author_facet |
Ferrari Usandizaga, Silvana Consuelo Martínez, Eric Javier Schedler, Mara Honfi, Ana I. Acuña, Carlos Alberto |
author_role |
author |
author2 |
Martínez, Eric Javier Schedler, Mara Honfi, Ana I. Acuña, Carlos Alberto |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Acroceras macrum Gramineas Cromosomas Meiosis Genotipos Grasses Chromosomes Genotypes Pasto del Nilo Nile Grass |
topic |
Acroceras macrum Gramineas Cromosomas Meiosis Genotipos Grasses Chromosomes Genotypes Pasto del Nilo Nile Grass |
dc.description.none.fl_txt_mv |
Acroceras macrum Stapf is a high-quality C3 grass species adapted to the subtropics. It is a valuable forage resource in frequently flooded environments. The objectives were to analyze the type of polyploidy, mode of reproduction, and estimate seed and pollen fertility. A living collection of 22 tetraploid and five hexaploid genotypes of A. macrum was analyzed. Type of polyploidy was analyzed from chromosomal pairing at diakinesis and prometaphase I, and meiotic irregularities were evaluated during the microsporogenesis. Pollen viability was also examined. Bivalents predominated in tetraploids and trivalents in hexaploids. Meiotic abnormalities were more frequent in hexaploids than in tetraploids, and they were mainly related to mechanisms of chromosome nondisjunction. The reproductive mode was determined by cytological analysis of megasporogenesis and megagametogenesis, seed fertility under different pollination methods, and molecular progeny tests. In both tetraploid and hexaploid races, only the development of single meiotically derived embryo sacs was observed. Greater seed production in outcrossing compared with selfing indicated a primarily allogamous matting system. Progenies from crosses between genetically different tetraploid genotypes amplified male-specific molecular markers, indicating a hybrid origin and solid evidence of sexual reproduction. Population breeding approaches developed for sexual cross-pollinated species are suited for improving A. macrum. EEA Corrientes Fil: Ferrari Usandizaga, Silvana Consuelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Corrientes; Argentina Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Schedler, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Honfi, Ana I. Universidad Nacional de Misiones. Instituto de Biología Subtropical nodo Posadas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical nodo Posadas; Argentina Fil: Acuña, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina |
description |
Acroceras macrum Stapf is a high-quality C3 grass species adapted to the subtropics. It is a valuable forage resource in frequently flooded environments. The objectives were to analyze the type of polyploidy, mode of reproduction, and estimate seed and pollen fertility. A living collection of 22 tetraploid and five hexaploid genotypes of A. macrum was analyzed. Type of polyploidy was analyzed from chromosomal pairing at diakinesis and prometaphase I, and meiotic irregularities were evaluated during the microsporogenesis. Pollen viability was also examined. Bivalents predominated in tetraploids and trivalents in hexaploids. Meiotic abnormalities were more frequent in hexaploids than in tetraploids, and they were mainly related to mechanisms of chromosome nondisjunction. The reproductive mode was determined by cytological analysis of megasporogenesis and megagametogenesis, seed fertility under different pollination methods, and molecular progeny tests. In both tetraploid and hexaploid races, only the development of single meiotically derived embryo sacs was observed. Greater seed production in outcrossing compared with selfing indicated a primarily allogamous matting system. Progenies from crosses between genetically different tetraploid genotypes amplified male-specific molecular markers, indicating a hybrid origin and solid evidence of sexual reproduction. Population breeding approaches developed for sexual cross-pollinated species are suited for improving A. macrum. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-17T13:27:00Z 2020-02-17T13:27:00Z 2020-01 info:eu-repo/date/embargoEnd/2021-02-17 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
acceptedVersion |
dc.identifier.none.fl_str_mv |
https://onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20081 http://hdl.handle.net/20.500.12123/6777 0011-183X 1435-0653 https://doi.org/10.1002/csc2.20081 |
url |
https://onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20081 http://hdl.handle.net/20.500.12123/6777 https://doi.org/10.1002/csc2.20081 |
identifier_str_mv |
0011-183X 1435-0653 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/restrictedAccess |
eu_rights_str_mv |
restrictedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Wiley |
publisher.none.fl_str_mv |
Wiley |
dc.source.none.fl_str_mv |
Crop Science : 1-22 (January 2020) reponame:INTA Digital (INTA) instname:Instituto Nacional de Tecnología Agropecuaria |
reponame_str |
INTA Digital (INTA) |
collection |
INTA Digital (INTA) |
instname_str |
Instituto Nacional de Tecnología Agropecuaria |
repository.name.fl_str_mv |
INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria |
repository.mail.fl_str_mv |
tripaldi.nicolas@inta.gob.ar |
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1844619142127157248 |
score |
12.559606 |