2019
DOI: 10.1089/zeb.2018.1576
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Genetic and Chromosomal Differentiation ofRhamdia quelen(Siluriformes, Heptapteridae) Revealed by Repetitive Molecular Markers and DNA Barcoding

Abstract: Rhamdia quelen, a species of Heptapteridae, is considered to be a complex because of taxonomic and phylogenetic inconsistencies. Determining the physical location of repetitive DNA sequences on the chromosomes and the DNA barcode might increase our understanding of these inconsistencies within different groups of fish. To this end, we analyzed R. quelen populations from two river basins in Brazil, Paraguay and Parana, using DNA barcoding and different chromosomal markers, including U2 snDNA, which has never be… Show more

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Cited by 10 publications
(12 citation statements)
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“…Clade C (Rq4 and Rq6) would have diverged within LP-PM-AO, which is consistent with marine transgressions in this region [14]. Rq2 individuals here analyzed showed the same COI mtDNA lineage reported for specimens from Miranda River [15] (Supplementary Files SIII and SVI), located far north from the La Plata Basin, close to the Amazon Basin. This is in accordance with Ríos et al [14], who proposed the origin of Rq2 in the Amazon Basin.…”
Section: Wide Distribution Of Interbred Mtdna Lineagessupporting
confidence: 83%
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“…Clade C (Rq4 and Rq6) would have diverged within LP-PM-AO, which is consistent with marine transgressions in this region [14]. Rq2 individuals here analyzed showed the same COI mtDNA lineage reported for specimens from Miranda River [15] (Supplementary Files SIII and SVI), located far north from the La Plata Basin, close to the Amazon Basin. This is in accordance with Ríos et al [14], who proposed the origin of Rq2 in the Amazon Basin.…”
Section: Wide Distribution Of Interbred Mtdna Lineagessupporting
confidence: 83%
“…In order to integrate the data from both mtDNA markers reported in previous studies [10,11,14,15,37], partial sequences of COI gene were analyzed in at least three specimens from each cytb mtDNA lineage (Rq2, Rq4 and Rq6, Ríos et al [14]) along with 126 other COI sequences retrieved from the GenBank (Supplementary File SIII). The COI gene was partially amplified using the universal DNA primers LCO1490 and HC02198 [38].…”
Section: Identification Of Rhamdia Quelen Mtdna Lineages Based On Parmentioning
confidence: 99%
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“…The same location of U2 snRNA gene sequences in all the Leptodactylus species analyzed so far may suggest a similarity among chromosomes 6 in these species as well as a relatively conserved distribution pattern of these small nuclear repetitive DNAs in the number of sites per genome, as already observed in other groups of animals [Úbeda-Manzanaro et al, 2010;Cabral-de-Mello et al, 2012;Bueno et al, 2013;Palacios-Gimenez et al, 2013;Ponzio et al, 2018]. However, there are some examples of diversification of the U2 snRNA genes, including their dispersion and differential organization in closely related species [Úbeda-Manzanaro et al, 2010;Utsunomia et al, 2014], as well as interpopulation variation in the accumulation of U2 snRNA gene clusters [Usso et al, 2019].…”
Section: Discussionsupporting
confidence: 59%
“…It has even been postulated that heterochromatin is involved in maintaining the structure of the nucleolus and the integrity of ribosomal DNA repeats (McStay and Grummt 2008). Visualization of a single carrier pair sequence for 18S rDNA is one of the most common features observed in the fish genome, unlike what was observed for the gene 5S ribosomal which may present variations in the chromosomal distribution, apparently through its association with transposable elements, suggesting independent evolutionary pathways for both types of rDNA (Pendás et al 1994;Martins and Galetti 2001;Cabral-de-Mello et al 2011;Scacchetti et al 2012;Sene et al 2014;Santos et al 2017;Usso et al 2019). Teleosts exhibit low levels of compartmentalization in their genomes, which would suggest that the configuration in S. violacea, observed for the two types of ribosomal DNA, would represent a relatively simple to organization state (Medrano et al 1988).…”
Section: Discussionmentioning
confidence: 99%