Cytogenetic mapping of H1 histone and ribosomal RNA genes in hybrids between catfish species Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum
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Karger Publishers
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Resumo
A physical chromosome mapping of the H1 histone and 5S and 18S ribosomal RNA (rRNA) genes was performed in interspecific hybrids of Pseudoplatystoma corruscans and P. reticulatum. The results showed that 5S rRNA clusters were located in the terminal region of 2 chromosomes. H1 histone and 18S ribosomal genes were co-localized in the terminal portion of 2 chromosomes (distinct from the chromosomes bearing 5S clusters). These results represent the first report of association between H1 histone and 18S genes in fish genomes. The chromosome clustering of ribosomal and histone genes was already reported for different organisms and suggests a possible selective pressure for the maintenance of this association. © 2012 S. Karger AG, Basel.
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Catfish Co-localization of rRNA and H1 genes Cytogenetics FISH Hybrid genome histone H1 RNA 18S RNA 5S animal tissue catfish chromosome map chromosome structure controlled study cytogenetics female fish genetics gene cluster gene location interspecific hybrid male nonhuman priority journal Pseudoplatystoma corruscans Pseudoplatystoma reticulatum RNA sequence Animals Catfishes Chromosome Mapping Chromosomes Fish Proteins Genes, rRNA Histones Hybridization, Genetic In Situ Hybridization, Fluorescence Multigene Family Polymerase Chain Reaction Polymorphism, Restriction Fragment Length RNA, Ribosomal RNA, Ribosomal, 18S RNA, Ribosomal, 5S Pseudoplatystoma
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Inglês
Citação
Cytogenetic and Genome Research, v. 139, n. 2, p. 102-106, 2013.
