Evolutionary trends in Hoplerythrinus unitaeniatus (Agassiz 1829) (Characiformes, Erythrinidae)

Rosa, Renata da; Rubert, Marceléia; Martins‐Santos, Isabel Cristina; Giuliano-Caetano, Lúcia

doi:10.1007/s11160-011-9237-3

Cited by 9 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In our study, the individuals from Paraguai and Alto Paraná River basins also showed 2n = 48 and karyotypes corresponding to the karyomorphs A and E, respectively, found in previous studies [Giuliano-Caetano et al, 2001;Diniz and Bertollo, 2003;Da Rosa et al, 2012].…”

Section: Discussionsupporting

confidence: 88%

“…The presence of conspicuous heterochromatic blocks, mainly located in pericentromeric/interstitial regions, is a common characteristic for chromosomes of H. unitaeniatus Bertollo, 2003, 2006;Da Rosa et al, 2012]. The individuals of distinct populations of H. unitaeniatus analyzed in this study had a similar pattern of heterochromatin, with the majority of the blocks located in interstitial positions.…”

Section: Discussionmentioning

confidence: 49%

“…Simple AgNORs were reported for the triploid specimen of the Amazon basin [Giuliano-Caetano and Bertollo, 1990], as found in specimens of the Arinos and Araguaia River basins. Multiple AgNOR sites, as observed in the individuals from Paraguai and Alto Paraná populations, represent the most frequent situation in the group [Giuliano-Caetano and Bertollo, 1988;Bertollo, 2003, 2006;Da Rosa et al, 2012;Martinez et al, 2015]. Variation in the location of these sites can also be seen in the chromosomes of H. unitaeniatus.…”

Section: Discussionmentioning

confidence: 96%

“…The geographical distribution of the H. unitaeniatus karyomorphs studied until now is shown in figure 4 . All the cytogenetic studies of H. unitaeniatus have demonstrated the extensive chromosomal variability [Giuliano-Caetano and Bertollo, 1988;Giuliano-Caetano et al, 2001;Bertollo, 2003, 2006;Da Rosa et al, 2012;Martinez et al, 2015], and the data of this study support the hypothesis that H. unitaeniatus is not a single species, but a species complex as proposed by GiulianoCaetano et al [2001]. Other species of Erythrinidae, such as Erythrinus erythrinus (Bloch & Schneider, 1801) and H. malabaricus , are also considered as species complex, especially due to the variability found in diploid chromosome number and particularly in the absence/presence of sex chromosome systems [Bertollo et al, 2000[Bertollo et al, , 2004.…”

Section: Discussionmentioning

confidence: 99%

“…Lastly, individuals with karyomorph D have 2n = 50 and are endemic to the São Francisco River basin; furthermore, hybrid individuals with intermediate 2n = 51 are also observed in this basin [Martinez et al, 2015]. Hoplerythrinus is the only genus within Erythrinidae without heteromorphic sex chromosomes [Giuliano-Caetano, 1986;Giuliano-Caetano and Bertollo, 1988;Giuliano-Caetano et al, 2001;Bertollo, 2003, 2006;Da Rosa et al, 2012;Martinez et al, 2015].…”

mentioning

confidence: 99%

See 4 more Smart Citations

Comparative Cytogenetics of Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) Species Complex from Different Brazilian Hydrographic Basins

Martinez

Lui²,

Traldi³

et al. 2016

Cytogenet Genome Res

View full text Add to dashboard Cite

Chromosomal characteristics of Hoplerythrinus unitaeniatus populations from 5 Brazilian river basins, namely Arinos (Amazonas basin), Araguaia, Paraguai, Alto Paraná, and São Francisco were analyzed by conventional Giemsa staining, C-banding, silver nitrate impregnation, and fluorescence in situ hybridization (FISH) with 18S and 5S rDNA and telomeric sequence (TTAGGG)_n probes. The diploid chromosome number was 2n = 48 in representatives of the populations from Paraguai and Alto Paraná River basins and 2n = 52 for those from the Arinos and Araguaia River basins. The São Francisco population had individuals with 2n = 50 and 52 occurring in sympatry. C-banding showed heterochromatic blocks mainly located at interstitial and pericentromeric positions in most of the chromosomes. Silver nitrate impregnation demonstrated simple NORs for representatives from Arinos and Araguaia River populations and multiple NORs for specimens from Paraguai, Alto Paraná, and São Francisco River populations. FISH with 18S and 5S rDNA probes revealed many chromosomes carrying these cistrons, with up to 21 chromosomes bearing 18S rDNA sites (Alto Rio Paraná basin) and up to 12 chromosomes with 5S rDNA sites (Paraguai basin), besides the occurrence of colocalization in all populations. FISH with telomeric sequence (TTAGGG)_n detected sites in the terminal portion of the chromosomes in all populations. These data reinforce the idea that H. unitaeniatus is a species complex. Evolutionary and biogeographical aspects of the group in the Neotropical region are discussed.

show abstract

Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Comparative Cytogenetics of Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) Species Complex from Different Brazilian Hydrographic Basins

Martinez

Lui²,

Traldi³

et al. 2016

Cytogenet Genome Res

View full text Add to dashboard Cite

show abstract

New Insights into the Biogeographic and Karyotypic Evolution ofHoplias Malabaricus

RosaRenata

Vicari²,

Lúcia³

et al. 2014

Zebrafish

View full text Add to dashboard Cite

Hoplias malabaricus is a species widely distributed throughout Brazil. Cytogenetic studies indicate the occurrence of extensive chromosomal rearrangements in population differentiation and speciation of the group that demonstrated an independent origin of sex chromosome systems. Seven karyomorphs were characterized for the species and are located in specific river basins, while others are distributed throughout several different basins. However, there are few studies linking the geographical distribution of H. malabaricus karyomorphs to the Brazilian hydrographic basins. This article provides new chromosomal information on five populations of H. malabaricus collected in a South Atlantic basin. The samples were analyzed by conventional and molecular cytogenetic techniques. Two karyomorphs, A (2n=42 m/sm) and C (2n=40 m/sm), were detected, and remarkable differences in the distribution of heterochromatin and GC-rich blocks were observed in the karyomorphs. A review of existing data is presented here, where we observe that dispersion is associated with the genesis of the South and Central America river basins. Coastal drainages represent an ancestral biogeographical component for many groups of fish, representing older basins, such as the basins of the Eastern Atlantic and San Francisco river, suggesting that existing karyomorphs found in these basins may represent a basal karyotype (karyomorph F) within H. malabaricus. The current cytogenetic data, including this article, for different karyomorphs of H. malabaricus in conjunction with the geological history of the continent allow us to determine that the ancestral group is most likely karyomorph F.

show abstract

Occurrence of Natural Hybrids Among Sympatric Karyomorphs inHoplerythrinus unitaeniatus(Characiformes, Erythrinidae)

et al. 2015

View full text Add to dashboard Cite

In this study, 43 specimens of Hoplerythrinus unitaeniatus from the São Francisco River basin were chromosomally analyzed by conventional Giemsa staining, C-banding, silver nitrate impregnation, and fluorescence in situ hybridization (FISH) with probes of 5S and 18S rDNA. The diploid numbers found were 50 and 52 chromosomes, showing the existence of two well-defined biological entities in sympatry. Specimens with 51 chromosomes, which showed three distinct karyotypic forms, were also found and are characterized as natural hybrids due to the correspondence with the chromosomes of the specimens with 50 and 52 chromosomes. By FISH using 5S and 18S rDNA probes, it was possible to detect specific chromosomal markers for the specimens with 50 and 52 chromosomes, as well as the occurrence of common sites in both. The specimens with 51 chromosomes showed intermediate patterns for these markers, reinforcing the hypothesis that these are actual natural hybrids. A review and new classification for the karyomorphs of H. unitaeniatus have also been proposed.

show abstract

Evolutionary trends in Hoplerythrinus unitaeniatus (Agassiz 1829) (Characiformes, Erythrinidae)

Cited by 9 publications

References 18 publications

Comparative Cytogenetics of Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) Species Complex from Different Brazilian Hydrographic Basins

Comparative Cytogenetics of Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) Species Complex from Different Brazilian Hydrographic Basins

New Insights into the Biogeographic and Karyotypic Evolution ofHoplias Malabaricus

Occurrence of Natural Hybrids Among Sympatric Karyomorphs inHoplerythrinus unitaeniatus(Characiformes, Erythrinidae)

Contact Info

Product

Resources

About