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Spontaneous triploidy and NOR activity in Eigenmannia sp. (Pisces, Sternopygidae) from the Amazon basin

DE ALMEIDA TOLEDO, L. F ; FORESTI, F ; DE ALMEIDA TOLEDO FILHO, S

Genetica, 1985-05, Vol.66 (2), p.85-88 [Periódico revisado por pares]

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Título:
Spontaneous triploidy and NOR activity in Eigenmannia sp. (Pisces, Sternopygidae) from the Amazon basin
Autor: DE ALMEIDA TOLEDO, L. F ; FORESTI, F ; DE ALMEIDA TOLEDO FILHO, S
Assuntos: Animals ; Biological and medical sciences ; Cytogenetics ; Eigenmannia ; Freshwater ; Fundamental and applied biological sciences. Psychology ; Genetics of eukaryotes. Biological and molecular evolution ; Vertebrata
É parte de: Genetica, 1985-05, Vol.66 (2), p.85-88
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The occurrence of a natural triploid among diploid individuals of Eigenmannia sp. from the Amazon basin is described. The diploid individuals had 2n = 31 and 32 chromosomes, the difference in chromosome number being due to a Robertsonian rearrangement. The triploid individual presented 2n = 46 and had two fused acrocentrics. NOR activity was present in the three homologues of triploid and a NOR polymorphism was detected in the triploid and diploids.
Editor: Dordrecht: Springer
Idioma: Inglês

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