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Abstract:

Cytogenetic characterization and determination of DNA content by flow cytometry of five species of Mecardonia Ruiz et Pavon, 1798 (Gratiolae, Plantaginaceae) was performed. This is the first study of nuclear DNA content carried out in the genus. Mitotic analysis revealed a base chromosome number x = 11 for all entities and different ploidy levels, ranging from diploid (2n = 2x = 22) to hexaploid (2n = 6x = 66). The results include the first report of the chromosome numbers for M. flagellaris (Chamisso & Schlechtendal, 1827) (2n = 22), M. grandiflora (Bentham) Pennell, 1946 (2n = 22), M. kamogawae Greppi & Hagiwara, 2011 (2n = 66), and Mecardonia sp. (2n = 44). The three ploidy levels here reported suggest that polyploidy is common in Mecardonia and appear to be an important factor in the evolution of this genus. The 2C- and 1Cx-values were also estimated in all the species. The 2C-values ranged from 1.91 to 5.29 pg. The 1Cx-values ranged from 0.88 to 1.03 pg. The general tendency indicated a decrease in the 1Cx-value with increasing ploidy level. The significance of the results is discussed in relation to taxonomy of the genus. © María M. Sosa et al.

Registro:

Documento: Artículo
Título:Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
Autor:Sosa, M.M.; Angulo, M.B.; Greppi, J.A.; Bugallo, V.
Filiación:Instituto de Botánica del Nordeste (UNNE-CONICET), Sargento Cabral 2131, Facultad de Ciencias Exactas, Naturales y Agrimensura (UNNE), Av. Libertad 5460, Corrientes, Argentina
Instituto de Floricultura, Instituto Nacional de Tecnología Agropecuaria, Hurlingham, Buenos Aires, Argentina
Palabras clave:Chromosome number; DNA content; Flow cytometry; Gratiolae; Polyploidy
Año:2016
Volumen:10
Número:4
Página de inicio:769
Página de fin:780
DOI: http://dx.doi.org/10.3897/CompCytogen.v10i4.10362
Título revista:Comparative Cytogenetics
Título revista abreviado:Comp. Cytogenet.
ISSN:19930771
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19930771_v10_n4_p769_Sosa

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Citas:

---------- APA ----------
Sosa, M.M., Angulo, M.B., Greppi, J.A. & Bugallo, V. (2016) . Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae). Comparative Cytogenetics, 10(4), 769-780.
http://dx.doi.org/10.3897/CompCytogen.v10i4.10362
---------- CHICAGO ----------
Sosa, M.M., Angulo, M.B., Greppi, J.A., Bugallo, V. "Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)" . Comparative Cytogenetics 10, no. 4 (2016) : 769-780.
http://dx.doi.org/10.3897/CompCytogen.v10i4.10362
---------- MLA ----------
Sosa, M.M., Angulo, M.B., Greppi, J.A., Bugallo, V. "Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)" . Comparative Cytogenetics, vol. 10, no. 4, 2016, pp. 769-780.
http://dx.doi.org/10.3897/CompCytogen.v10i4.10362
---------- VANCOUVER ----------
Sosa, M.M., Angulo, M.B., Greppi, J.A., Bugallo, V. Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae). Comp. Cytogenet. 2016;10(4):769-780.
http://dx.doi.org/10.3897/CompCytogen.v10i4.10362