Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)

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This paper presents the karyotype, DNA content and meiotic behaviour of five species of Vicia from Argentina (V. macrograminea Burk., V. graminea SM., V. epetiolaris Burk., V. pampicola Burk. and V. nana Vog.). All the species have the same chromosome number and karyotype formula (2n = 14; 6 m + 4 s...

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Autores principales: Naranjo, C.A., Ferrari, M.R., Palermo, A.M., Poggio, L.
Formato: JOUR
Materias:
Karyotype
Meiotic behaviour
NOR banding
Nuclear DNA content
Orthoselection
Vicia species
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03057364_v82_n6_p757_Naranjo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03057364_v82_n6_p757_Naranjo
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spelling todo:paper_03057364_v82_n6_p757_Naranjo2023-10-03T15:21:56Z Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae) Naranjo, C.A. Ferrari, M.R. Palermo, A.M. Poggio, L. Karyotype Meiotic behaviour NOR banding Nuclear DNA content Orthoselection Vicia species This paper presents the karyotype, DNA content and meiotic behaviour of five species of Vicia from Argentina (V. macrograminea Burk., V. graminea SM., V. epetiolaris Burk., V. pampicola Burk. and V. nana Vog.). All the species have the same chromosome number and karyotype formula (2n = 14; 6 m + 4 st + 4 t). Each species, however, displays a characteristic number and position of the nucleolar organizer region (NOR) and different sizes of the respective satellites, confirmed by Ag-NOR banding. Moreover, significant differences were found in the total chromosome volume (TCV) and DNA content of the species. Positive correlations between DNA content and TCV, and between DNA content and type of life cycle were also found. TCV and DNA content are lower in V. nana (annual) and higher in V. macrograminea (biennial-perennial). The material displayed marked karyotypic orthoselection, with similar karyotypes in all studied species, even when the overall chromosome size varied. Evolutionary changes in DNA amount are proportional to the relative length of each chromosome arm, maintaining karyotypic uniformity. Significant differences were found between the meiotic behaviour of V. graminea and that of the other species. V. graminea has a lower frequency of ring bivalents and chiasmata per cell, and also has a lower interstitial chiasma frequency. In general, the results are congruent with the morphological data reported for these species. Fil:Naranjo, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrari, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Palermo, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03057364_v82_n6_p757_Naranjo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Karyotype
Meiotic behaviour
NOR banding
Nuclear DNA content
Orthoselection
Vicia species
spellingShingle Karyotype
Meiotic behaviour
NOR banding
Nuclear DNA content
Orthoselection
Vicia species
Naranjo, C.A.
Ferrari, M.R.
Palermo, A.M.
Poggio, L.
Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
topic_facet Karyotype
Meiotic behaviour
NOR banding
Nuclear DNA content
Orthoselection
Vicia species
description This paper presents the karyotype, DNA content and meiotic behaviour of five species of Vicia from Argentina (V. macrograminea Burk., V. graminea SM., V. epetiolaris Burk., V. pampicola Burk. and V. nana Vog.). All the species have the same chromosome number and karyotype formula (2n = 14; 6 m + 4 st + 4 t). Each species, however, displays a characteristic number and position of the nucleolar organizer region (NOR) and different sizes of the respective satellites, confirmed by Ag-NOR banding. Moreover, significant differences were found in the total chromosome volume (TCV) and DNA content of the species. Positive correlations between DNA content and TCV, and between DNA content and type of life cycle were also found. TCV and DNA content are lower in V. nana (annual) and higher in V. macrograminea (biennial-perennial). The material displayed marked karyotypic orthoselection, with similar karyotypes in all studied species, even when the overall chromosome size varied. Evolutionary changes in DNA amount are proportional to the relative length of each chromosome arm, maintaining karyotypic uniformity. Significant differences were found between the meiotic behaviour of V. graminea and that of the other species. V. graminea has a lower frequency of ring bivalents and chiasmata per cell, and also has a lower interstitial chiasma frequency. In general, the results are congruent with the morphological data reported for these species.
format JOUR
author Naranjo, C.A.
Ferrari, M.R.
Palermo, A.M.
Poggio, L.
author_facet Naranjo, C.A.
Ferrari, M.R.
Palermo, A.M.
Poggio, L.
author_sort Naranjo, C.A.
title Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
title_short Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
title_full Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
title_fullStr Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
title_full_unstemmed Karyotype, DNA content and meiotic behaviour in five South American species of Vicia (Fabaceae)
title_sort karyotype, dna content and meiotic behaviour in five south american species of vicia (fabaceae)
url http://hdl.handle.net/20.500.12110/paper_03057364_v82_n6_p757_Naranjo
work_keys_str_mv AT naranjoca karyotypednacontentandmeioticbehaviourinfivesouthamericanspeciesofviciafabaceae
AT ferrarimr karyotypednacontentandmeioticbehaviourinfivesouthamericanspeciesofviciafabaceae
AT palermoam karyotypednacontentandmeioticbehaviourinfivesouthamericanspeciesofviciafabaceae
AT poggiol karyotypednacontentandmeioticbehaviourinfivesouthamericanspeciesofviciafabaceae
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