Long-time evolution and highly dynamic satellite DNA in leptodactylid and hylodid frogs

Vittorazzi, Stenio Eder; Lourenço, Luciana Bolsoni; Recco‐Pimentel, Shirlei Maria

doi:10.1186/s12863-014-0111-x

Cited by 31 publications

(59 citation statements)

References 56 publications

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“…The more commonly repetitive sequences found within these heterochromatic blocks are the highly tandemly repeated sequences, satellite DNAs (satDNAs) (Enukashvily and Ponomartsev 2013;Vittorazzi et al 2014). These can exhibit several millions of copies in a genome, organized into long arrays (e.g., Adega et al 2009;Plohl 2010), being preferentially located in or around centromeres (e.g., Plohl et al 2014), or eventually assume an interstitial and/or terminal location (e.g., Santos et al 2004;Louzada et al 2008).…”

Section: Introductionmentioning

confidence: 99%

The puzzling character of repetitive DNA in Phodopus genomes (Cricetidae, Rodentia)

et al. 2015

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Three novel repetitive DNA sequences are described, presenting a similar heterochromatic chromosomal location in two hamster species: Phodopus roborovskii and Phodopus sungorus (Cricetidae, Rodentia). Namely, two species-specific repetitive sequences (PROsat from P. roborovskii and PSUchr1sat from P. sungorus) surrounding a third one (PsatDNA), that is shared by both hamster genomes. Fiber-FISH analyses revealed that PROsat intermingles with PsatDNA in P. roborovskii and PSUchr1sat intermingles with PsatDNA in P. sungorus. A model explaining the evolution of this intricate chromosomal distribution is proposed, which can explain better the evolution of these very derivative genomes (in comparison to the ancestral Muroidea). The most plausible evolutionary scenario seems to be the expansion of a number of repeats into other's domain, most probably resulting in its intermingling, followed by the subsequent spread of these complex repeats from a single chromosomal location to other chromosomes. Evidences of an association between repetitive sequences and the chromosome evolution process were observed, namely for PROsat. Most probably, the evolutionary breakpoints that shaped PRO and PSU chromosomes (pericentric inversions and fusions) occurred within the boundaries of PROsat blocks in the ancestor. The repeats high diversity at the heterochromatic regions of Phodopus chromosomes, together with its complex organization, suggests that these species are important models for evolutionary studies, namely in the investigation of a possible relationship between repetitive sequences and the occurrence of chromosomal rearrangements and consequently, in genome evolution.

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Section: Introductionmentioning

confidence: 99%

The puzzling character of repetitive DNA in Phodopus genomes (Cricetidae, Rodentia)

et al. 2015

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“…It was possible to recognize PcP190 satellite DNA in both Physalaemus kroyeri and Physalaemus cicada , as found in a number of other Physalaemus species, such as Physalaemus cuvieri , Physalaemus centralis , Physalaemus albonotatus , Physalaemus albifrons , Physalaemus ephippifer , Phyllodactylus marmoratus and Physalaemus nattereri (Steindachner, 1863), as well as members of other leptodactylid genera, such as Pleurodema diplolister (Peters, 1870), Leptodactylus latrans (Steffen, 1815) and Crossodactylus gaudichaudii Duméril & Bibron, 1841 (Vittorazzi et al 2014a) and in the hylid genus Pseudis (Gatto et al 2016). This sequence is well conserved, and appears to have an ancient origin in the anurans (Vittorazzi et al 2014a, Gatto et al 2016).…”

Section: Discussionmentioning

confidence: 85%

“…The results of the present study permit the differentiation of the karyotypes of Physalaemus albifrons and Physalaemus kroyeri by the presence of interstitial bands of heterochromatin on the long arms of pairs 6 and 8 in Physalaemus kroyeri , which are absent in Physalaemus albifrons (Vittorazzi et al 2014b), and an interstitial band on the short arm of pair 8 in Physalaemus albifrons , which was absent in Physalaemus kroyeri . One other difference between the two species can be observed in pair 1, in which PcP190 satellite DNA is present in Physalaemus kroyeri , but not in Physalaemus albifrons (Vittorazzi et al 2014a). …”

Section: Discussionmentioning

confidence: 97%

“…This sequence is well conserved, and appears to have an ancient origin in the anurans (Vittorazzi et al 2014a, Gatto et al 2016). …”

Section: Discussionmentioning

confidence: 99%

“…The species of the Physalaemus cuvieri group studied by C-banding (Silva et al 1999, Quinderé et al 2009, Nascimento et al 2010, Vittorazzi et al 2014b) all present a block of interstitial heterochromatin in the metacentric chromosome 5, which is a potential cytogenetic marker of the Physalaemus cuvieri group (Vittorazzi et al 2014b, Lourenço et al 2015). The chromosomal location of the PcP190 satellite DNA is known for Physalaemus cuvieri , Physalaemus centralis , Physalaemus albonotatus , Physalaemus albifrons and Physalaemus ephippifer (Vittorazzi et al 2011, Vittorazzi et al 2014a). …”

Section: Introductionmentioning

confidence: 99%

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Chromosomal analysis of Physalaemus kroyeri and Physalaemus cicada (Anura, Leptodactylidae)

Vittorazzi¹,

Lourenço²,

Solé³

et al. 2016

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All the species of Physalaemus Fitzinger, 1826 karyotyped up until now have been classified as 2n = 22. The species of the Physalaemus cuvieri group analyzed by C-banding present a block of heterochromatin in the interstitial region of the short arm of pair 5. Physalaemus cicada Bokermann, 1966 has been considered to be a member of the Physalaemus cuvieri species group, although its interspecific phylogenetic relationships remain unknown. The PcP190 satellite DNA has been mapped on the chromosomes of most of the species of the Physalaemus cuvieri group. For two species, Physalaemus cicada and Physalaemus kroyeri (Reinhardt & Lütken, 1862), however, only the chromosome number and morphology are known. Given this, the objective of the present study was to analyze the chromosomes of Physalaemus cicada and Physalaemus kroyeri, primarily by C-banding and PcP190 mapping. The results indicate that Physalaemus kroyeri and Physalaemus cicada have similar karyotypes, which were typical of Physalaemus. In both species, the NORs are located on the long arm of pair 8, and the C-banding indicated that, among other features, Physalaemus kroyeri has the interstitial band on chromosome 5, which is however absent in Physalaemus cicada. Even so, a number of telomeric bands were observed in Physalaemus cicada. The mapping of the PcP190 satellite DNA highlighted areas of the centromeric region of the chromosomes of pair 1 in both species, although in Physalaemus kroyeri, heteromorphism was also observed in pair 3. The cytogenetic evidence does not support the inclusion of Physalaemus cicada in the Physalaemus cuvieri group. In the case of Physalaemus kroyeri, the interstitial band on pair 5 is consistent with the existence of a cytogenetic synapomorphy in the Physalaemus cuvieri species group.

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Characterization of a satellite DNA in the genera Lacerta and Timon (Reptilia, Lacertidae) and its role in the differentiation of the W chromosome

et al. 2018

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In this study, IMO-TaqI satDNA, previously isolated in several species of Lacertidae, was isolated and characterized from four species of the genus Lacerta and three of the genus Timon. The aim was to gain further insights into the evolutionary dynamics of this satDNA, its occurrence among lacertids and to understand if it plays any role in sex chromosome evolution in these seven species. The results here obtained highlighted the presence of this repetitive element in the genome of all the species investigated, thus indicating that IMO-TaqI satDNA is evolutionary conserved among a wide variety of lacertids. In addition, this element was found to be very abundant in the constitutive heterochromatin of the W-sex chromosome of the four Lacerta species investigated. The occurrence of IMO-TaqI satDNA on Lacerta heterochromosome suggests that it is involved in the differentiation of the W chromosome by heterochromatinization, and the fact that it is absent in the W of other lacertids investigated seems to confirm that repetitive DNA sequences would remain randomly trapped into the sex chromosomes, undergoing amplification as a consequence of the suppression of recombination.

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Long-time evolution and highly dynamic satellite DNA in leptodactylid and hylodid frogs

Cited by 31 publications

References 56 publications

The puzzling character of repetitive DNA in Phodopus genomes (Cricetidae, Rodentia)

The puzzling character of repetitive DNA in Phodopus genomes (Cricetidae, Rodentia)

Chromosomal analysis of Physalaemus kroyeri and Physalaemus cicada (Anura, Leptodactylidae)

Characterization of a satellite DNA in the genera Lacerta and Timon (Reptilia, Lacertidae) and its role in the differentiation of the W chromosome

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