Karyotypes of Leptodactylidae Anurans

Denaro, L.

doi:10.2307/1563095

Cited by 26 publications

(29 citation statements)

References 10 publications

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“…The karyotypes of the four species of leptodactylid analyzed are similar to that described by Denaro (1972), Bianchi et al (1973), Bogart (1974), Agostinho (1994), Silva et al (2000), Baldo (2002), and Amaro-Ghilardi et al (2006) who pointed out the conserva- (2000), Baldo (2002), and Amaro-Ghilardi et al (2006) who pointed out the conserva- (2006) who pointed out the conservatism of the Leptodactylus karyotypes. Despite that no significant difference was observed in morphology, the pattern of C-banding or NOR localization between the specimens from the two environments and the occurrence of chromosomal polymorphisms in different amphibian populations were related, involving especially the diploid number, NORs and constitutive heterochromatin (Ruiz et al, 1981;Silva et al, 1999Silva et al, , 2000Lourenço et al, 1998Lourenço et al, , 2003Medeiros et al, 2003;Rosa et al, 2003).…”

Section: Cytogenetic Analysissupporting

confidence: 68%

Cytogenetic and random ampliied polymorphic DNA analysis of Leptodactylus species from rural and urban environments (Anura, Amphibia)

Arruda

Morielle‐Versute²

2008

Genet. Mol. Res.

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ABSTRACT. Cytogenetic and random amplified polymorphic DNA analyses carried out in the species Leptodactylus podicipinus, L. ocellatus, L. labyrinthicus, and L. fuscus from rural and urban habitats of the northwest region of São Paulo State, Brazil, showed that the karyotypes (2n = 22), constitutive heterochromatin distribution and nucleolus organizer region (NOR) location did not differ between the populations from the two environments. The in situ hybridization with an rDNA probe confirmed the location of the NORs on chromosome 8 revealing an in tandem duplication of that region in one of the chromosomes of L. fuscus. DAPI showed that part of the C-band-positive heterochromatin is rich in AT, including that in the proximity the NORs in L. podicipinus and L. ocellatus. The molecular analyses showed that the two populations (urban and rural) of L. podicipinus and L. fuscus are similar from a genetic point of view. The urban and rural populations of species L. ocellatus and L. labyrinthicus showed differences in genetic structures, probably due to urbanization which interferes with the dispersion of those frogs. The marked differences observed between the two populations of L. ocellatus can be representing the cryptic condition of the species. Unweighted pair-group method of analysis and genetic distance analysis detected the genetic proximity between L. ocellatus and L. fuscus. The results indicate that there was no reduction in the genetic diversity in the populations from the urban environment; however, the survival of these frogs would not be guaranteed in the case of an increase in human impact especially for populations of L. labyrinthicus and L. ocellatus.

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Section: Cytogenetic Analysissupporting

confidence: 68%

Cytogenetic and random ampliied polymorphic DNA analysis of Leptodactylus species from rural and urban environments (Anura, Amphibia)

Arruda

Morielle‐Versute²

2008

Genet. Mol. Res.

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“…While both the species analyzed in the present study had been previously karyotyped, beginning in the 1970s (Denaro 1972, Bianchi et al 1973, Bogart 1974, and revised more recently (Amaro- Ghilardi et al 2006, Silva et al 2006, this is the first cytogenetic study of populations from the Caatinga, the least well protected Brazilian biome (Leal et al 2005).…”

Section: Discussionmentioning

confidence: 95%

“…Approximately 40 species of Leptodactylus have been karyotyped (Zaracho and Hernando 2011), and most share very similar features, with the emphasis on metacentric and submetacentric chromosomes (Silva et al 2004, Amaro-Ghilardi et al 2006, Gazoni et al 2012. A number of cytogenetic studies have reinforced the conservative nature of the karyotypes of the representatives of this genus (Denaro 1972, Bianchi et al 1973, Bogart 1974, Silva et al 2000, Amaro-Ghilardi et al 2006, Arruda and Morielle-Versute 2008, Gazoni et al 2012. The taxonomic position of a number of species groups is, however, still controversial (Angulo et al 2003, Heyer 2005, Lavilla et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic study of Leptodactylus fuscus and L. latrans (Anura: Leptodactylidae) from the semiarid Brazilian Caatinga scrublands

Oliveira¹,

Moares²,

Dertônio³

et al. 2014

Phyllomedusa

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Cytogenetic study of Leptodactylus fuscus and L. latrans (Anura: Leptodactylidae) from the semiarid Brazilian Caatinga scrublands. Frogs in the family Leptodactylidae have diploid chromosome numbers ranging from 2n = 18 to 2n = 26, although there is a predominance of 2n = 22 karyotypes. In the present study, 52 specimens of Leptodactylus fuscus and Leptodactylus latrans were obtained from three municipalities (Carira, Poço Redondo, and Tobias Barreto) of the Brazilian state of Sergipe for karyotype analysis using conventional Giemsa staining techniques, and C-and Ag-NOR banding of the chromosomes obtained from the intestinal epithelium. The results of this study show that the individuals analyzed have highly similar karyotypes, with no evidence of any pronounced species-specific markers. However, some differences were observed in the chromosome morphology and C-bands in comparison with the karyotypes described previously for these species, which may represent intraspecific geographic variation in both taxa.Keywords: amphibians, chromosomes, C-bands, Ag-NOR. 126Phyllomedusa -12(2), December 2013 Resumo Análise citogenética de Leptodactylus fuscus e L. latrans (Anura: Leptodactylidae) de áreas de Caatinga do Brasil. A família Leptodactylidae apresenta números diplóides que variam de 2n = 18 a 2n = 26, porém, na maioria dos gêneros descritos na literatura, há uma predominância de cariótipos com 2n = 22. Neste trabalho foram analisados citogeneticamente 52 exemplares de Leptodactylus fuscus e Leptodactylus latrans coletados pela primeira vez no estado de Sergipe, norte do Brasil, nos municípios de Carira, Poço Redondo e Tobias Barreto, por meio de técnicas de coloração convencional, Banda C e Ag-RON, empregadas em preparações do epitélio intestinal. Os dados mostraram que as espécies aqui analisadas apresentaram padrões cariotípicos muito similares, sem evidência de marcadores específicos das espécies. Contudo, algumas variações de morfologia cromossômica e bandas C observadas divergiram de cariótipos já descritos na literatura e podem indicar diferenças cromossômicas geográficas intraespecíficas para ambas as espécies.

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“…Until now this is the only species in the subfamily with 28 chromosomes, and a secondary constriction on pair 3. The majority of Hylodes and Crossodactylus species agree in karyotype features, with 26 chromosomes (with exception of H. nasus, 2n=24) and a very large first pair of chromosomes (with exception of C. dispar) containing a secondary constriction and frequently one more constriction in another chromosome pair (Becak 1968, Bogart 1970, 1991, Denaro 1972, De Lucca and Jim 1974. Like all hylodine there are no distinctive size group of chromosome in M. massarti.…”

Section: Resultsmentioning

confidence: 99%

The Karyotype of the Stream Dwelling Frog Megaelosia massarti (Anura, Leptodactylidae, Hylodinae).

Melo¹,

Recco‐Pimentel²,

Giaretta³

1995

CYTOLOGIA

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Karyotypes of Leptodactylidae Anurans

Cited by 26 publications

References 10 publications

Cytogenetic and random ampliied polymorphic DNA analysis of Leptodactylus species from rural and urban environments (Anura, Amphibia)

Cytogenetic and random ampliied polymorphic DNA analysis of Leptodactylus species from rural and urban environments (Anura, Amphibia)

Cytogenetic study of Leptodactylus fuscus and L. latrans (Anura: Leptodactylidae) from the semiarid Brazilian Caatinga scrublands

The Karyotype of the Stream Dwelling Frog Megaelosia massarti (Anura, Leptodactylidae, Hylodinae).

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