2008
DOI: 10.1590/s1415-47572008000200020 View full text |Buy / Rent full text
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Abstract: Cytogenetic analyses performed in populations of the Neotropical freshwater fish Leporinus elongatus of the Upper Paraná River basin showed a chromosome polymorphism involving heterochromatic segments of the nucleolar organizing pair in this species. The NOR-bearing chromosome pair was characterized by two phenotypes identified by the absence (C 1 ) or presence (C 2 ) of a heterochromatic segment located in an interstitial position of the long arm in this pair. The meiotic segregation of these variations resul… Show more

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