Cytogenetics of bisexual/unisexual species of Poecilia
- 1 January 1992
- journal article
- Published by S. Karger AG in Cytogenetic and Genome Research
- Vol. 60 (3-4) , 229-235
- https://doi.org/10.1159/000133346
Abstract
Chromosomes of Poecilia mexicana mexicana, one of the bisexual species involved in the hybrid origin of the unisexual teleost fish species P. formosa, were analyzed by several staining techniques. Sex-specific, differential heterochromatin, found in other congeneric species, was not observed in P. m. mexicana. Nucleolar organizer regions were polymorphic among individual specimens within a given population sample. A single specimen exhibiting intraindividual variability of chromosome pair 1 and a specimen with a triploid karyotype are also described.Keywords
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