Karyotype and Chromosome Structure in the Lizard, Gallotia galloti in the Canary Islands

Cano, J.; Báez, Mariana; López-Jurado, Luis Felipe; Ortega, Gutiérrez

doi:10.2307/1564092

Cited by 13 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…sexlineatus, and Ti. lepidus agreed with the previous reports [34,35,37,39,[53][54][55][56][57][58]. To the best of our knowledge, the karyotypes of Gas.…”

Section: Karyotype Reconstruction and Heterochromatin Distributionsupporting

confidence: 91%

See 1 more Smart Citation

Evolutionary Variability of W-Linked Repetitive Content in Lacertid Lizards

Suwala

Altmanová

Mazzoleni

et al. 2020

Genes

View full text Add to dashboard Cite

Lacertid lizards are a widely radiated group of squamate reptiles with long-term stable ZZ/ZW sex chromosomes. Despite their family-wide homology of Z-specific gene content, previous cytogenetic studies revealed significant variability in the size, morphology, and heterochromatin distribution of their W chromosome. However, there is little evidence about the accumulation and distribution of repetitive content on lacertid chromosomes, especially on their W chromosome. In order to expand our knowledge of the evolution of sex chromosome repetitive content, we examined the topology of telomeric and microsatellite motifs that tend to often accumulate on the sex chromosomes of reptiles in the karyotypes of 15 species of lacertids by fluorescence in situ hybridization (FISH). The topology of the above-mentioned motifs was compared to the pattern of heterochromatin distribution, as revealed by C-banding. Our results show that the topologies of the examined motifs on the W chromosome do not seem to follow a strong phylogenetic signal, indicating independent and species-specific accumulations. In addition, the degeneration of the W chromosome can also affect the Z chromosome and potentially also other parts of the genome. Our study provides solid evidence that the repetitive content of the degenerated sex chromosomes is one of the most evolutionary dynamic parts of the genome.

show abstract

“…sexlineatus, and Ti. lepidus agreed with the previous reports [34,35,37,39,[53][54][55][56][57][58]. To the best of our knowledge, the karyotypes of Gas.…”

Section: Karyotype Reconstruction and Heterochromatin Distributionsupporting

confidence: 91%

“…Gal. galloti has an all-acrocentric karyotype with 2n = 40 chromosomes gradually decreasing in size as previously reported by Cano et al [57]. In all studied species, the W chromosomes can be identified by C-banding; however, Z chromosomes are difficult to distinguish from autosomes ( Figure 1).…”

Section: Karyotype Reconstruction and Heterochromatin Distributionsupporting

confidence: 81%

Evolutionary Variability of W-Linked Repetitive Content in Lacertid Lizards

Suwala

Altmanová

Mazzoleni

et al. 2020

Genes

View full text Add to dashboard Cite

show abstract

“…Here all the specimens had a karyotype with 38 acrocentric macrochromosomes and 2 microchromosomes in agreement with the report of Cano et al (1984). In several metaphase plates some macrochromosomes showed very small short arms, often C-band positive (Fig.…”

Section: Gallotia Gallotisupporting

confidence: 89%

“…Two of these may be derived from the 36 + 2 one by Robertsonian mechanisms, a third lacks microchromosomes (Gorman, 1969(Gorman, , 1973Kupriyanova, 1980). A 2n --40 karyotype with an additional pair of small macrochromosomes has recently been reported in the three species of Gallotia (Cano et al, 1984;Lopez-Jurado et al, 1985) and in a specimen of Psammodromus algirus (De Smet, 1981).…”

Section: Introductionmentioning

confidence: 99%

C-band variability and phylogeny of Lacertidae

Olmo¹,

Odierna²,

Cobror³

1986

Genetica

View full text Add to dashboard Cite

The karyology of various species from the family Lacertidae (Reptilia, Sauria) has been studied with conventional and C-banding techniques.The study shows that this family is not so conservative from a karyological viewpoint as considered till now. In fact a higher diploid number than that generally observed in most species of Lacertidae and supernumerary chromosomes have been observed in three of the species investigated. Moreover an evident interand intraspecific variability has been found in the C-banding pattern of the various species studied. The situation found in Podarcis sicula is particularly remarkable. Different C-banding patterns have been observed in three different subspecies and in two populations of the same subspecies. These variations do not show a well defined trend and their role in the evolution of lacertid lizards is discussed.The C-banding analysis evidences also the existence in two of the species studied of a female sex heteromorphism, in which the W chromosome has the same shape and size as the Z, but differs from it in being completely heterochromatic. This situation reminds that observed in some snakes and suggests that in lacertid lizards the evolution of sex chromosomes might have followed the same steps previously hypothesized for ophidians.

show abstract

“…Thus Gallotia was placed in a separate family Gallotiidae Cano et al 1984. Family rank is inappropriate for this genus (Arnold 1989a), but the name has been converted to subfamilial status as Gallotiinae for Gallotia and its close relative Psammodromus (see Mayr & Benyr 1994).…”

Section: Nomenclaturementioning

confidence: 99%

Relationships of lacertid lizards (Reptilia: Lacertidae) estimated from mitochondrial DNA sequences and morphology

Harris

Arnold

Thomas

1998

Proc. R. Soc. Lond. B

198

183

View full text Add to dashboard Cite

DNA sequences from parts of the 12S, 16S and cytochrome b mitochondrial genes, which totalled 1049 aligned base pairs, were used to estimate the relationships of 49 species of Lacertidae, including representatives of 19 out of the 23 recognized genera and 23 species of the paraphyletic genus Lacerta. These data were used, together with morphological information, to estimate the relationships within the family. Molecular evidence corroborates the monophyletic status of many genera and species groups originally based on morphology. It indicates that Psammodromus forms a clade with Gallotia, which is the sister taxon of all other lacertids. These comprise three units: the primarily Afrotropical armatured group; the largely Oriental Takydromus; and the west Palaearctic Lacerta and its derivatives, Podarcis and Algyroides. Morphology also supports the ¢rst three assemblages, but suggests that they are derived from a paraphyletic Lacerta. Within Lacerta and its allies, DNA sequence analysis corroborates the a¤nity of some members of each of the subgenera Lacerta s. str. and Timon, and of the L. saxicola group. It also supports the relationship of L. monticola, L. bonnali and L. horvathi, and suggests that the L. parvaL. fraasi clade and L. brandti are not related to Psammodromus^Gallotia, as morphology indicates, but instead are associated respectively with the L. danfordi and L. saxicola groups. DNA sequence data provide additional evidence that the eastern Arabian`Lacerta' jayakari and`L.' cyanura are members of the armatured clade and also sister species. Our analysis supports an origin for present lacertids in west Eurasia. The armatured clade invaded Africa, probably in the mid-Miocene, spreading widely and evolving increasingly xeric-adapted forms, one lineage of which later moved back into the Palaearctic. Lacerta' jayakari and`L.' cyanura are assigned to Omanosaura, Lutz and Mayer 1986. The name Gallotiinae Cano, Baez, Lopez-Jurado & Ortega, 1984 is available for the Gallotia^Psammodromus clade, Eremiainae Shcherbak 1975 for the armatured clade and Lacertinae for Lacerta, Podarcis and Algyroides. Two new subgenera of Lacerta are proposed here: Caucasilacerta for L. saxicola and its allies, and Parvilacerta for L. parva and L. fraasi.

show abstract

Karyotype and Chromosome Structure in the Lizard, Gallotia galloti in the Canary Islands

Cited by 13 publications

References 6 publications

Evolutionary Variability of W-Linked Repetitive Content in Lacertid Lizards

Evolutionary Variability of W-Linked Repetitive Content in Lacertid Lizards

C-band variability and phylogeny of Lacertidae

Relationships of lacertid lizards (Reptilia: Lacertidae) estimated from mitochondrial DNA sequences and morphology

Contact Info

Product

Resources

About