Cytogenetic studies in four cultivated Amaranthus [Amaranthaceae] species

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].

Bibliographic Details

Main Authors:	Bonasora, Marisa Graciela, Poggio, Lidia, Greizerstein, Eduardo José
Format:	Texto biblioteca
Language:	eng
Subjects:	AMARANTHUS, CONSTITUTIVE HETEROCHROMATIN, DAPI-CMA3, FISH, NORS,
Online Access:	http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46957
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