Consulta: subjectFacets:"Karyotype structure"
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Data/hora: 11/06/2024 13:59:51

Population structure, fluctuating asymmetry and genetic variability in an endemic and highly isolated Astyanax fish population (Characidae)
Provedor de dados: 74
Autores: Gross,Maria Claudia; Schneider,Carlos Henrique; Matiello,Mara Cristina de Almeida; Leite,Maysa de Lima; Bertollo,Luiz Antonio Carlos; Artoni,Roberto Ferreira.
Morphological and chromosomal markers were used to infer the structure and genetic variability of a population of fish of the genus Astyanax, geographically isolated at sinkhole 2 of Vila Velha State Park, Paraná, Brazil. Two morphotypes types were observed, the standard phenotype I and phenotype II which showed an anatomical alteration probably due to an inbreeding process. Fluctuating asymmetry (FA) analysis of different characters showed low levels of morphological variation among the population from sinkhole 2 and in another population from the Tibagi river (Paraná, Brazil). The Astyanax karyotype was characterized in terms of chromosomal morphology, constitutive heterochromatin and nucleolar organizer regions. Males and females presented similar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Astyanax sp.; Fluctuating asymmetry; Karyotype structure; Triploidy; Genetic conservation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400011