Abstract

PAEZ, Valeria  and  ANDRADA, Aldo. Karyotypic analysis of two species of Halerpestes (Ranunculaceae) from Argentine Northwest. Lilloa [online]. 2019, vol.56, n.2, pp.59-66. ISSN 0075-9481.  http://dx.doi.org/doi.org/10.30550/j.lil/2019.56.2/5.

Halerpestes (Ranunculaceae) is a small genus with 13 species. Three of them are typical from the Northwest region of Argentina: H. cymbalaria, H. exilis and H. uniflora. In recent investigations, H. exilis was separated as a different species than H. cymbalaria, since it was considered as a variety of the last species. In this work, chromosomal counts and karyotypes of H. cymbalaria and H. exilis were performed using classical cytogenetic techniques. The results were conclusive in that both taxa are diploid and present 2n = 16 chromosomes, asymmetric and unimodal karyotypes; however, there are differences in chromosomal size and chromatin organization, with H. exilis having a chromosomal pair with satellite not observed in the other taxon. The taxonomic location of H. cymbalaria and H. exilis as different species, carried out by different authors is reinforced by our results.

Keywords : Karyotype; mitosis; ploidy level.

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