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- W1973293457 abstract "Among four specimens of Astyanax scabripinnis sympatrically collected from the Tamanduá stream (State of São Paulo, Brazil), three, named cytotype I, had 2n = 50 chromosomes (6M + 26SM + 4ST + 14A) and a fundamental number (FN) of 86, and one specimen, named cytotype II, had 2n = 48 chromosomes (6M + 28SM + 4ST + 10A) and FN = 86. Besides the difference in diploid number, the cytotypes showed a clear difference in the distribution of constitutive heterochromatin. One NOR-bearing chromosome pair was detected in both cytotypes and one specimen of cytotype I had multiple NORs (tree chromosome pairs). Robertsonian translocations and an increase or loss of heterochromatin are proposed to explain the karyotypic divergence observed. Some aspects related to the chromosome evolution of Astyanax scabripinnis are discussed." @default.
- W1973293457 created "2016-06-24" @default.
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- W1973293457 date "2000-06-01" @default.
- W1973293457 modified "2023-10-03" @default.
- W1973293457 title "Sympatric occurrence of two cytotypes of Astyanax scabripinnis (Characiformes, Characidae)" @default.
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- W1973293457 doi "https://doi.org/10.1590/s1415-47572000000200021" @default.
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