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Abstract:

In the present study, the chromosomes numbers were confirmed, 2n = 34 for Amaranthus cruentus Linnaeus, 1759, and 2n = 32 for A. hypochondriacus Linnaeus, 1753, A. mantegazzianus Passer, 1864, and A. caudatus Linnaeus, 1753. The distribution and variability of constitutive heterochromatin were detailed using DAPI-CMA3 banding technique. The position of the nucleolus organizer region (NOR) was observed using Ag-NOR banding (active loci) and fluorescent in situ hybridization (rDNA-FISH) in the four Amaranthus species. Variations in the amount of constitutive heterochromatin were detected both within the species and between them, with DAPI-CMA3 stain. One chromosome pair having a NOR was found in each studied accession, with exception of A. caudatus cv. EEA INTA Anguil. This accession presented four rDNA loci (FISH), being active two of them (Ag-banding). © Marisa Graciela Bonasora et al.

Registro:

Documento: Artículo
Título:Cytogenetic studies in four cultivated Amaranthus (Amaranthaceae) species
Autor:Bonasora, M.G.; Poggio, L.; Greizerstein, E.J.
Filiación:Cátedra de Botánica Agrícola, Facultad de Agronomía, Universidad de Buenos Aires., Av. San Martín 4453 (C1417DSE), Buenos Aires, Argentina
Laboratorio de Citogenética y Evolución, Departamento de Ecología,Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160 (C1428EGA), Buenos Aires, Argentina
Cátedra de Mejoramiento Genético, Facultad de Ciencias Agrarias, UNLZ, Ruta 4-Km, 2-Llavallol (CP 1836), Argentina
CONICET, Argentina
Palabras clave:Amaranthus; Constitutive heterochromatin; DAPI-CMA3; FISH; NORs
Año:2013
Volumen:7
Número:1
Página de inicio:53
Página de fin:61
DOI: http://dx.doi.org/10.3897/CompCytogen.v7i1.4276
Título revista:Comparative Cytogenetics
Título revista abreviado:Comp. Cytogenet.
ISSN:19930771
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19930771_v7_n1_p53_Bonasora

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Citas:

---------- APA ----------
Bonasora, M.G., Poggio, L. & Greizerstein, E.J. (2013) . Cytogenetic studies in four cultivated Amaranthus (Amaranthaceae) species. Comparative Cytogenetics, 7(1), 53-61.
http://dx.doi.org/10.3897/CompCytogen.v7i1.4276
---------- CHICAGO ----------
Bonasora, M.G., Poggio, L., Greizerstein, E.J. "Cytogenetic studies in four cultivated Amaranthus (Amaranthaceae) species" . Comparative Cytogenetics 7, no. 1 (2013) : 53-61.
http://dx.doi.org/10.3897/CompCytogen.v7i1.4276
---------- MLA ----------
Bonasora, M.G., Poggio, L., Greizerstein, E.J. "Cytogenetic studies in four cultivated Amaranthus (Amaranthaceae) species" . Comparative Cytogenetics, vol. 7, no. 1, 2013, pp. 53-61.
http://dx.doi.org/10.3897/CompCytogen.v7i1.4276
---------- VANCOUVER ----------
Bonasora, M.G., Poggio, L., Greizerstein, E.J. Cytogenetic studies in four cultivated Amaranthus (Amaranthaceae) species. Comp. Cytogenet. 2013;7(1):53-61.
http://dx.doi.org/10.3897/CompCytogen.v7i1.4276