Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)

Four populations of Chrysolaena verbascifolia (Vernonieae: Asteraceae) from localities in Argentina were cytologically analysed for meiotic behaviour and pollen viability. This is the first meiotic analysis in the species. All were diploids with 2n = 2x = 20 and all showed quite regular meiotic beha...

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Detalles Bibliográficos
Autores principales: Via Do Pico, Gisela Mariel, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Taylor and Francis Ltd 2021
Materias:
Bivalents
Meiotic abnormalities
Pollen viability
Univalents
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28209
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28209
record_format dspace
spelling I48-R184-123456789-282092025-03-28T23:08:08Z Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae) Via Do Pico, Gisela Mariel Dematteis, Massimiliano Bivalents Meiotic abnormalities Pollen viability Univalents Four populations of Chrysolaena verbascifolia (Vernonieae: Asteraceae) from localities in Argentina were cytologically analysed for meiotic behaviour and pollen viability. This is the first meiotic analysis in the species. All were diploids with 2n = 2x = 20 and all showed quite regular meiotic behaviour. We also report the occurrence of accessory chromosomes in all the populations of the species. The majority of the populations displayed regular bivalent formation during late prophase stages and metaphase I, and chromosome segregation at anaphase. However, some chromosomal irregularities were recorded, mainly during meiosis I, including univalents, out-of-plate chromosomes and precocious segregation in metaphase, and laggards and chromatin bridges in anaphase. The B chromosomes and abnormal behaviours of the chromosomes during meiosis observed did not affect pollen development in these taxa, as viability was always high. 2021-06-23T15:36:41Z 2021-06-23T15:36:41Z 2017-01 Artículo Via Do Pico, Gisela Mariel y Dematteis, Massimiliano, 2017. Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae:asteraceae). Webbia. London: Taylor and Francis Ltd., vol. 72, no. 1, p.139-147. ISSN 2169-4060. 0083-7792 http://repositorio.unne.edu.ar/handle/123456789/28209 eng https://www.tandfonline.com/doi/full/10.1080/00837792.2016.1260881 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Taylor and Francis Ltd Webbia, 2017, vol. 72, no. 1, p.139-147.
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 Bivalents
Meiotic abnormalities
Pollen viability
Univalents
spellingShingle Bivalents
Meiotic abnormalities
Pollen viability
Univalents
Via Do Pico, Gisela Mariel
Dematteis, Massimiliano
Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
topic_facet Bivalents
Meiotic abnormalities
Pollen viability
Univalents
description Four populations of Chrysolaena verbascifolia (Vernonieae: Asteraceae) from localities in Argentina were cytologically analysed for meiotic behaviour and pollen viability. This is the first meiotic analysis in the species. All were diploids with 2n = 2x = 20 and all showed quite regular meiotic behaviour. We also report the occurrence of accessory chromosomes in all the populations of the species. The majority of the populations displayed regular bivalent formation during late prophase stages and metaphase I, and chromosome segregation at anaphase. However, some chromosomal irregularities were recorded, mainly during meiosis I, including univalents, out-of-plate chromosomes and precocious segregation in metaphase, and laggards and chromatin bridges in anaphase. The B chromosomes and abnormal behaviours of the chromosomes during meiosis observed did not affect pollen development in these taxa, as viability was always high.
format Artículo
author Via Do Pico, Gisela Mariel
Dematteis, Massimiliano
author_facet Via Do Pico, Gisela Mariel
Dematteis, Massimiliano
author_sort Via Do Pico, Gisela Mariel
title Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
title_short Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
title_full Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
title_fullStr Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
title_full_unstemmed Meiotic behaviour and B chromosomes in Argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
title_sort meiotic behaviour and b chromosomes in argentine populations of chrysolaena verbascifolia (vernonieae: asteraceae)
publisher Taylor and Francis Ltd
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28209
work_keys_str_mv AT viadopicogiselamariel meioticbehaviourandbchromosomesinargentinepopulationsofchrysolaenaverbascifoliavernonieaeasteraceae
AT dematteismassimiliano meioticbehaviourandbchromosomesinargentinepopulationsofchrysolaenaverbascifoliavernonieaeasteraceae
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