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BIBTEX RIS

Cytogenetic characterization of species of the family Heptapteridae (Teleostei: Siluriformes) from the Cuiabá and Ivaí River Basins, Brazil

2015; Research Foundation of Ribeirão Preto; Volume: 14; Issue: 3 Linguagem: Inglês

10.4238/2015.july.31.12

ISSN

1676-5680

Autores

Ligia Magrinelli Barbosa, Gonçalo Ferreira, Ana Camila Prizon, Ana Luiza de Brito Portela-Castro, Isabel Cristina Martins-Santos,

Tópico(s)

CRISPR and Genetic Engineering

Resumo

We cytogenetically characterized three species of Heptapteridae (Pimelodella sp, Pimelodella taenioptera, and Imparfinis schubarti) by investigating the distribution of constitutive heterochromatin and nucleolar organizer regions by silver nitrate impregnation (Ag-NOR) and fluorescence in situ hybridization.Pimelodella sp showed had a diploid number (2n) = 46 chromosomes, 26m + 10sm + 10st, and FN = 92; P. taenioptera, 2n = 52 chromosomes, 26m + 22sm + 4st, and FN = 104; and I. schubarti, 2n = 58 chromosomes, 28m + 28sm + 2st, and FN = 116.The two Pimelodella species had Ag-NORs sites on the submetacentric pair 14, located on the short arm in terminal position.In I. schubarti, the Ag-NORs sites were in an interstitial position on the long arm of the metacentric pair 1. C-banding revealed that Pimelodella sp contained a small amount of constitutive heterochroma-©FUNPEC-RP www.funpecrp.com.

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