Analysis of Karyotypic Evolution in Natural Populations of Cynolebias(Pisces: Cyprinodontiformes, Rivulidae) Using Banding Techniques.

García, Graciela; Scvortzoff, E.; Maspoli, M.C; Vaz-Ferreira, R.

doi:10.1508/cytologia.58.85

Cited by 20 publications

(34 citation statements)

References 19 publications

(13 reference statements)

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“…Since annual life cycle occurs in highly heterogeneous environments and seasonal habitats, several parameters may be considered in such life style as age-dependent mortality, non-overlapping generations and inbreeding in a full-sib group. In such context deterministic and stochastic factors could shape the population structure and chromosomal rearrangements reaching fixation in the homozygous state as was found in different species of Austrolebias (García et al 1993(García et al , 1995(García et al , 2001.…”

Section: Genome Repeat Expansion and Speciation In Austrolebiasmentioning

confidence: 97%

“…In fact, extensive karyotype divergence within and among species of Austrolebias by means of Robertsonian (centric fusion events) and nonRobertsonian (pericentric inversions) chromosomal rearrangement has been previously described, encompassing cladogenetic events in this genus (García et al 1993(García et al , 1995(García et al , 2001. The higher proportion of Babar and Ty3/Gypsy retroelements as well as Tc1-like transposons found in A. charrua could be associated with high rate of chromosomes changes by means of pericentric inversions occurring at intra and interpopulation levels in this taxon, as was previously reported (García 2006).…”

Section: Genome Repeat Expansion and Speciation In Austrolebiasmentioning

confidence: 99%

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Next-generation sequencing detects repetitive elements expansion in giant genomes of annual killifish genus Austrolebias (Cyprinodontiformes, Rivulidae)

2015

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Among Neotropical fish fauna, the South American killifish genus Austrolebias (Cyprinodontiformes: Rivulidae) constitutes an excellent model to study the genomic evolutionary processes underlying speciation events. Recently, unusually large genome size has been described in 16 species of this genus, with an average DNA content of about 5.95 ± 0.45 pg per diploid cell (mean C-value of about 2.98 pg). In the present paper we explore the possible origin of this unparallel genomic increase by means of comparative analysis of the repetitive components using NGS (454-Roche) technology in the lowest and highest Rivulidae genomes. Here, we provide the first annotated Rivulidae-repeated sequences composition and their relative repetitive fraction in both genomes. Remarkably, the genomic proportion of the moderately repetitive DNA in Austrolebias charrua genome represents approximately twice (45%) of the repetitive components of the highly related rivulinae taxon Cynopoecilus melanotaenia (25%). Present work provides evidence about the impact of the repeat families that could be distinctly proliferated among sublineages within Rivulidae fish group, explaining the great genome size differences encompassing the differentiation and speciation events in this family.

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Section: Genome Repeat Expansion and Speciation In Austrolebiasmentioning

confidence: 97%

Section: Genome Repeat Expansion and Speciation In Austrolebiasmentioning

confidence: 99%

Next-generation sequencing detects repetitive elements expansion in giant genomes of annual killifish genus Austrolebias (Cyprinodontiformes, Rivulidae)

2015

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“…This genus is highly variable in its morphology (Vaz-Ferreira and Sierra 1972;Costa 1990Costa , 1995Loureiro and De Sa´1998) and behaviour (Vaz-Ferreira and Sierra 1973). Also, extensive intraspecific and interspecific karyotypic divergences have been well documented in species from Uruguay, Argentina and Rio Grande do Sul in Brazil (Garcı´a et al 1993(Garcı´a et al , 1995(Garcı´a et al , 2001.…”

Section: Introductionmentioning

confidence: 99%

Multiple simultaneous speciation in killifishes of the Cynolebias adloffi species complex (Cyprinodontiformes, Rivulidae) from phylogeography and chromosome data

García

2006

J Zoological System

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The annual killifishes of the genus Cynolebias Steindachner, 1876, include one of the well-supported clades composed of the Cynolebias adloffi species complex of the Ban˜ados del Este Biosphere Reserve Site, from the Atlantic coastal wetlands in Uruguay. One member of this clade, Cynolebias charrua, has been considered as an intergradation complex of populations between C. adloffi and C. viarius by showing high levels of morphological variability. Systematic affinities between both taxa have been historically discussed. In the present study, a phylogeographic approach based on mitochondrial cytochrome b haplotype analysis and chromosome data are presented. According to the present data a scenario of a multiple simultaneous speciation process and perhaps reticulation events is possible in the C. adloffi species complex, followed by divergence associated with Quaternary marine transgressions in this region. This hypothetic scenario could explain the remarkable genetic diversity and the lack of phylogenetic resolution among clades in C. charrua, as well as the disconcordance in the phylogenetic relationships among Cynolebias from different data sets. Several parameters of DNA polymorphism and chromosome data have also suggested that populations of C. charrua from southern Laguna Merin, in eastern Uruguay and southern Brazil, could represent a relictual group from a widespread ancestral population. Chromosome rearrangements like pericentric inversions in isolated populations could have triggered cladogenetic events from this highly polymorphic population. Present analysis suggests that the metapopulation could represent the management units in these endangered killifishes and that the populations of C. charrua from the Laguna Merin basin could be included in a high-priority conservation programme.

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“…Within the sister-suborder Aplocheiloidei we see an increased propensity for karyotypic reduction, the Neotropical clade Rivulidae showing a few sporadic cases (n ϭ 10 for Pterolebias longipinnis, n ϭ 16-17 in a handful of taxa) amid a larger trend of n ϭ 22-24 chromosomes (Scheel, 1972(Scheel, , 1990Garcia et al, 1993;Collier, unpublished data).…”

Section: Phylogenetic Relationships Of African Killifishesmentioning

confidence: 93%

Phylogenetic Relationships of African Killifishes in the GeneraAphyosemionandFundulopanchaxInferred from Mitochondrial DNA Sequences

Murphy

Collier

1999

Molecular Phylogenetics and Evolution

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Analysis of Karyotypic Evolution in Natural Populations of Cynolebias(Pisces: Cyprinodontiformes, Rivulidae) Using Banding Techniques.

Cited by 20 publications

References 19 publications

Next-generation sequencing detects repetitive elements expansion in giant genomes of annual killifish genus Austrolebias (Cyprinodontiformes, Rivulidae)

Next-generation sequencing detects repetitive elements expansion in giant genomes of annual killifish genus Austrolebias (Cyprinodontiformes, Rivulidae)

Multiple simultaneous speciation in killifishes of the Cynolebias adloffi species complex (Cyprinodontiformes, Rivulidae) from phylogeography and chromosome data

Phylogenetic Relationships of African Killifishes in the GeneraAphyosemionandFundulopanchaxInferred from Mitochondrial DNA Sequences

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