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resumen
Resumen
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,
[ver mas...]
dc.contributor.author | Ferrari Usandizaga, Silvana Consuelo | |
dc.contributor.author | Martínez, Eric Javier | |
dc.contributor.author | Schedler, Mara | |
dc.contributor.author | Honfi, Ana I. | |
dc.contributor.author | Acuña, Carlos Alberto | |
dc.date | info:eu-repo/date/embargoEnd/2021-02-17 | |
dc.date.accessioned | 2020-02-17T13:27:00Z | |
dc.date.available | 2020-02-17T13:27:00Z | |
dc.date.issued | 2020-01 | |
dc.identifier.issn | 0011-183X | |
dc.identifier.issn | 1435-0653 | |
dc.identifier.other | https://doi.org/10.1002/csc2.20081 | |
dc.identifier.uri | https://onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20081 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12123/6777 | |
dc.description.abstract | 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. | eng |
dc.format | application/pdf | es_AR |
dc.language.iso | eng | es_AR |
dc.publisher | Wiley | es_AR |
dc.rights | info:eu-repo/semantics/embargoedAccess | es_AR |
dc.source | Crop Science : 1-22 (January 2020) | es_AR |
dc.subject | Acroceras macrum | es_AR |
dc.subject | Gramineas | es_AR |
dc.subject | Grasses | eng |
dc.subject | Cromosomas | es_AR |
dc.subject | Chromosomes | eng |
dc.subject | Meiosis | es_AR |
dc.subject | Genotipos | es_AR |
dc.subject | Genotypes | eng |
dc.subject.other | Pasto del Nilo | es_AR |
dc.subject.other | Nile Grass | eng |
dc.title | Mode of Reproduction and Meiotic Chromosome Behavior in Acroceras macrum | es_AR |
dc.type | info:ar-repo/semantics/artículo | es_AR |
dc.type | info:eu-repo/semantics/article | es_AR |
dc.type | info:eu-repo/semantics/acceptedVersion | es_AR |
dc.description.origen | EEA Corrientes | es_AR |
dc.description.fil | Fil: Ferrari Usandizaga, Silvana Consuelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Corrientes; Argentina | es_AR |
dc.description.fil | 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 | es_AR |
dc.description.fil | 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 | es_AR |
dc.description.fil | 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 | es_AR |
dc.description.fil | 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 | es_AR |
dc.subtype | cientifico |
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