Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America

The number and behavior of meiotic chromosomes in four populations of three species of Vernonanthura were analyzed. It was observed that all stages of meiosis were stable without chromosomal irregularities. The somatic chromosome number is reported for four populations of three species of Vernonanth...

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Autores principales: Vega, Álvaro José, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Taylor & Francis 2021
Materias:
Vernonanthura
Vernonia
Kariotype
Mitosis
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28208
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28208
record_format dspace
spelling I48-R184-123456789-282082025-03-06T11:01:35Z Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America Vega, Álvaro José Dematteis, Massimiliano Vernonanthura Vernonia Kariotype Mitosis The number and behavior of meiotic chromosomes in four populations of three species of Vernonanthura were analyzed. It was observed that all stages of meiosis were stable without chromosomal irregularities. The somatic chromosome number is reported for four populations of three species of Vernonanthura and two populations of Vernonia. All species were diploid with 2n = 34. The first chromosome count is presented for Vernonanthura chaquensis (2n = 17II and 2n = 34). The karyotypes were determined for Vernonanthura lucida (32m + 2sm), V. oligactoides (24m + 10sm) and V. pseudolinearifolia (28m + 6sm); they are presented for the first time. The total length of the karyotype was 31.67μ–40.48 μm. The average chromosome length was 1.86μ–2.38 μm and the centromeric index was 38.61–42.99. Vernonanthura oligactoides showed the smallest variation of chromosome length within the karyotype (1.42 μm) while V. squamulosa had the biggest (2.15 μm). The different karyotypic parameters were analyzed with two statistic tests. The resulting species arrangement from Unweighted Pair Group Method with Arithmetic Mean (UPGMA) grouping analysis fully fits with that obtained with principal component analysis (PCA). Both tests demonstrated congruence between karyotypic parameter and classification based on morphological characters. 2021-06-23T15:33:57Z 2021-06-23T15:33:57Z 2016-02 Artículo Vega, Álvaro José y Dematteis, Massimiliano, 2016. Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from South America. Carylogia. Florencia: Taylor & Francis, vol. 69, no. 1, p. 29-37. ISSN 2165-5391. 0008-7114 http://repositorio.unne.edu.ar/handle/123456789/28208 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Taylor & Francis Caryologia, 2016, vol. 69, no. 1, p. 29-37.
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 Vernonanthura
Vernonia
Kariotype
Mitosis
spellingShingle Vernonanthura
Vernonia
Kariotype
Mitosis
Vega, Álvaro José
Dematteis, Massimiliano
Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
topic_facet Vernonanthura
Vernonia
Kariotype
Mitosis
description The number and behavior of meiotic chromosomes in four populations of three species of Vernonanthura were analyzed. It was observed that all stages of meiosis were stable without chromosomal irregularities. The somatic chromosome number is reported for four populations of three species of Vernonanthura and two populations of Vernonia. All species were diploid with 2n = 34. The first chromosome count is presented for Vernonanthura chaquensis (2n = 17II and 2n = 34). The karyotypes were determined for Vernonanthura lucida (32m + 2sm), V. oligactoides (24m + 10sm) and V. pseudolinearifolia (28m + 6sm); they are presented for the first time. The total length of the karyotype was 31.67μ–40.48 μm. The average chromosome length was 1.86μ–2.38 μm and the centromeric index was 38.61–42.99. Vernonanthura oligactoides showed the smallest variation of chromosome length within the karyotype (1.42 μm) while V. squamulosa had the biggest (2.15 μm). The different karyotypic parameters were analyzed with two statistic tests. The resulting species arrangement from Unweighted Pair Group Method with Arithmetic Mean (UPGMA) grouping analysis fully fits with that obtained with principal component analysis (PCA). Both tests demonstrated congruence between karyotypic parameter and classification based on morphological characters.
format Artículo
author Vega, Álvaro José
Dematteis, Massimiliano
author_facet Vega, Álvaro José
Dematteis, Massimiliano
author_sort Vega, Álvaro José
title Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
title_short Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
title_full Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
title_fullStr Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
title_full_unstemmed Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
title_sort cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south america
publisher Taylor & Francis
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28208
work_keys_str_mv AT vegaalvarojose cytotaxonomyofsomespeciesofvernonanthuraandvernoniaasteraceaevernonieaefromsouthamerica
AT dematteismassimiliano cytotaxonomyofsomespeciesofvernonanthuraandvernoniaasteraceaevernonieaefromsouthamerica
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