Chromosomal diversification in the gekkonid Tarentola mauritanica (Reptilia, Gekkonidae)

Odierna, Gaëtano; Aprea, Gennaro; Capriglione, Teresa; Caputo, Vincenzo; Olmo, Ettore

doi:10.1080/11250009409355902

Cited by 12 publications

(11 citation statements)

References 28 publications

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“…Multiple small pericentric inversions explained the differentiation between the almost all acrocentric and the biarmed karyotypes of Phyllopezus pollicaris pollicaris and P. periosus (2n = 40), respectively [Pellegrino et al, 1997]. The same rearrangement was also associated with the origin of biarmed chromosomes in the teiid Cnemidophorus ocellifer (2n = 50) [Santos et al, 2007] and with the differentiation of the karyotypes in gymnophthalmids [Pellegrino et al, 1999a, b;Yonenaga-Yassuda and Rodrigues, 1999], geckos [Odierna et al, 1994] and within Iguania [Kasahara et al, 1987;Bertolotto et al, 2002].…”

Section: Discussionmentioning

confidence: 99%

“…Pellegrino et al [1997] reported the differentially stained karyotypes of Phyllopezus periosus and P. pollicaris pollicaris , both with 40 chromosomes, but differing by pericentric inversions, whereas P. pollicaris przewalski exhibited 2n = 38 due to a Robertsonian fusion. All the species of the Tarentola mauritanica complex showed karyotypes composed of 42 chromosomes, but differed in the lengths of the short arms of telocentric chromosomes and/or in the number of biarmed elements [Odierna et al, 1994]. These differences were attributed to amplification of the satellite-DNA sequences contained in the heterochromatin and to pericentric inversions.…”

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confidence: 99%

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Chromosomal Evolution in the Brazilian Geckos of the Genus Gymnodactylus (Squamata, Phyllodactylidae) from the Biomes of Cerrado, Caatinga and Atlantic Rain Forest: Evidence of Robertsonian Fusion Events and Supernumerary Chromosomes

Pellegrino

Santos²,

Rodrigues³

et al. 2009

Cytogenet Genome Res

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Chromosomes of the South American geckos Gymnodactylus amarali and G. geckoides from open and dry areas of the Cerrado and Caatinga biomes in Brazil, respectively, were studied for the first time, after conventional and AgNOR staining, CBG- and RBG-banding, and FISH with telomeric sequences. Comparative analyses between the karyotypes of open areas and the previously studied Atlantic forest species G. darwinii were also performed. The chromosomal polymorphisms detected in populations of G. amarali from the states of Goiás and Tocantins is the result of centric fusions (2n = 38, 39 and 40), suggesting a differentiation from a 2n = 40 ancestral karyotype and the presence of supernumerary chromosomes. The CBG- and RBG-banding patterns of the Bs are described. G. geckoides has 40 chromosomes with gradually decreasing sizes, but it is distinct from the 2n = 40 karyotypes of G. amarali and G. darwinii due to occurrence of pericentric inversions or centromere repositioning. NOR location seems to be a marker for Gymnodactylus, as G. amarali and G. geckoides share a medium-sized subtelocentric NOR-bearing pair, while G. darwinii has NORs at the secondary constriction of the long arm of pair 1. The comparative analyses indicate a non-random nature of the Robertsonian rearrangements in the genus Gymnodactylus.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Chromosomal Evolution in the Brazilian Geckos of the Genus Gymnodactylus (Squamata, Phyllodactylidae) from the Biomes of Cerrado, Caatinga and Atlantic Rain Forest: Evidence of Robertsonian Fusion Events and Supernumerary Chromosomes

Pellegrino

Santos²,

Rodrigues³

et al. 2009

Cytogenet Genome Res

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“…Karyological analyses were performed on two specimens (male and female) from the Montes de León, Sanabria, both in the province of Zamora (Laguna de los Peces, Sierra Segundera), and a female from El Teleno (Puerto El Morredero, León) collected by one of the authors (O.A.). Chromosomes were obtained by the standard air-drying method described in Odierna et al (1994) from intestine, oviducts, spleen, lungs, gonads and kidney. In addition to standard staining methods (5% Giemsa solution in pH 7 phosphate buffer), various banding methods were also performed: Ag-NOR banding (Howell & Black, 1980); chromomycin A 3 /methylic green staining (CMA 3 ) following Sahar & Latt (1980); C-banding according to Sumner's method (1972); and sequential C-banding+CMA 3 +DAPI staining as reported by Odierna et al (1999).…”

Section: Karyologymentioning

confidence: 99%

Description of a new endemic species of mountain lizard from Northwestern Spain: Iberolacerta galani sp. nov. (Squamata : Lacertidae)

Arribas¹,

Carranza

Odierna³

2006

Zootaxa

Self Cite

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A new species of Iberolacerta is described from the Montes de León (northwest Iberia). This new species, Iberolacerta galani sp. nov., is characterized by its relatively large size, high number of blue ocelli on the shoulders and the relatively frequent contact or near-contact between the supranasal and the first loreal scale, the fairly straight squamosal bone (only curved on its posterior part), a unique karyotype in Iberolacerta combining 2n=36 chromosomes, an L-type NOR and differentiated W and Z sex chromosomes, and unique mitochondrial DNA sequences for the cytochrome b and 12S rRNA genes. The correlation analyses show that morphology in general, but especially scalation, is strongly correlated with the amount of precipitation during the months of lizard activity, which suggests that these are not good taxonomic characters, and that other characters apparently independent of the climate like for instance osteological, karyological and DNA features are much more reliable in delimiting species boundaries in Iberolacerta. According to our phylogenetic analyses, I. galani nov. is part of a very well supported clade that originated around 2.5 mya and also includes I. monticola and I. martinezricai. Phylogeny suggests I.martinezricai might be the sister taxon to I. galani nov. from which it split approximately 2 mya, at the beginning of the Pleistocene. The clade containing I. galani nov., I. martinezricai and I. monticola was probably widely distributed across western Iberia during moderately cool and moist phases of the Pleistocene, but it was probably restricted to its present range as a result of the general temperature increase during the Holocene and competition with other lacertid lizards. Iberolacerta galani nov. is endemic to the Montes de León, where it is isolated from the other species of the “monticola-group” by the Duero and Miño-Sil Rivers, but particularly by the Bibei river valley.

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“…Eggs were incubated at temperatures between 27-30 ° C, either at a constant temperature within this range or with daily fluctuations between these 2 temperatures. None of the Tarentola species that have been karyotyped show evidence of heteromorphic sex chromosomes [De Smet, 1981;Odierna et al, 1994].…”

Section: Phyllodactylidaementioning

confidence: 99%

A Review of Sex Determining Mechanisms in Geckos (Gekkota: Squamata)

Gamble¹

2010

Sex Dev

105

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Geckos are a species-rich clade of reptiles possessing diverse sex determining mechanisms. Some species possess genetic sex determination, with both male and female heterogamety, while other species have temperature-dependent sex determination. I compiled information from the literature on the taxonomic distribution of these sex determining mechanisms in geckos. Using phylogenetic data from the literature, I reconstructed the minimum number of transitions among these sex determining mechanisms with parsimony-based ancestral state reconstruction. While only a small number of gecko species have been characterized, numerous changes among sex determining mechanisms were inferred. This diversity, coupled with the high frequency of transitions, makes geckos excellent candidates as a model clade for the study of vertebrate sex determination and evolution.

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Chromosomal diversification in the gekkonid Tarentola mauritanica (Reptilia, Gekkonidae)

Cited by 12 publications

References 28 publications

Chromosomal Evolution in the Brazilian Geckos of the Genus <i>Gymnodactylus</i> (Squamata, Phyllodactylidae) from the Biomes of Cerrado, Caatinga and Atlantic Rain Forest: Evidence of Robertsonian Fusion Events and Supernumerary Chromosomes

Chromosomal Evolution in the Brazilian Geckos of the Genus <i>Gymnodactylus</i> (Squamata, Phyllodactylidae) from the Biomes of Cerrado, Caatinga and Atlantic Rain Forest: Evidence of Robertsonian Fusion Events and Supernumerary Chromosomes

Description of a new endemic species of mountain lizard from Northwestern Spain: Iberolacerta galani sp. nov. (Squamata : Lacertidae)

A Review of Sex Determining Mechanisms in Geckos (Gekkota: Squamata)

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