![]() The role of repetitive elements in adaptation to highly diverse habitats, as well as in the generation of the phenotypic and genetic variability found in wild Discus populations, needs to be further investigated. Correlations among the accumulation of repetitive elements, heterochromatinization and chromosome rearrangements have been hypothesized to explain the karyotype differentiation in the Symphysodon genus. Symphysodon aequifasciatus and Symphysodon discus, the other two Discus species, were found to have no significant genetic differences, suggesting they are. Although this species is popularly used in. Symphysodon discus Synonyms: None Physical description: The Heckle Discus is rounder than S. Physical mapping of repetitive 5S rDNA sequences and Rex3 retrotransposons in mitotic and meiotic chromosomes showed partial colocalization of constitutive heterochromatin and repetitive elements. Appearance Like cichlids from the genus Pterophyllum, all Symphysodon species have a laterally compressed body shape. The Neotropical red discus fish, Symphysodon discus, originates from the Amazonian basin and has a discoid body. Researchers place all three species of Discus in the taxonomic genus Symphysodon. They are members of the Cichlidae family, along with other cichlid species. People refer to three different species by this name, including the blue, green, and red. C-banding showed blocks of constitutive heterochromatin mainly in the pericentromeric region. Discus fishes: mitochondrial DNA evidence for a phylogeographic barrier in the Amazonian genus Symphysodon (Teleostei: Cichlidae). The Discus is a brightly colored fish that lives in South America. In the 3 species, diploid chromosome number was 2n = 60 and karyotypes contained predominantly meta-submetacentric chromosomes. haraldi using C-banding and fluorescent in situ hybridization (FISH) with the Rex3 retrotransposon and 5S rDNA probes in mitotic and meiotic chromosomes. Infact the Discus is also known as the Symphysodon or the pompadour fish. As part of a genetic screening program for wild Discus fishes, we analyzed karyotypes and cytogenetic characteristics of Symphysodon aequifasciatus, S. As part of a genetic screening program for wild Discus fishes, we analyzed karyotypes and cytogenetic characteristics of Symphysodon aequifasciatus. The Discus Fish belongs to the Cichlidae family and Symphysodon Genus. ![]()
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