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Genetics and Molecular Biology

Print version ISSN 1415-4757On-line version ISSN 1678-4685

Abstract

VANZELA, André L.L.  and  GUERRA, Marcelo. Heterochromatin differentiation in holocentric chromosomes of Rhynchospora (Cyperaceae). Genet. Mol. Biol. [online]. 2000, vol.23, n.2, pp.453-456. ISSN 1678-4685.  http://dx.doi.org/10.1590/S1415-47572000000200034.

Holocentric chromosomes of six species of Rhynchospora, R. ciliata, R. pubera, R. riparia and R. barbata (2n = 10), R. nervosa (2n = 30) and R. globosa (2n = 36), were stained with CMA3/DAPI fluorochromes or treated with C-banding and sequentially stained with Giemsa or CMA3/DAPI. Variability in banding pattern was found among the species studied. Heterochromatin was observed on terminal and interstitial chromosome regions, indicating that the holocentric chromosomes of Rhynchospora show a heterochromatin distribution pattern similar to those plant monocentric chromosomes.

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