Chromosome studies in Sminthillus from Cuba and Eleutherodactylus from Cuba and Puerto Rico (Anura: Leptodactylidae)

Bogart, James P.

doi:10.5962/bhl.title.52080

Cited by 23 publications

(20 citation statements)

References 12 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This chromosome was submetacentric in E. guentheri and metacentric in E. parvus, with the short arm being bigger in E. parvus, probably because of the presence of a secondary constriction associated with a heterochromatic block. Bogart (1981) and King (1991) suggested that reciprocal translocations, inversions and additions of heterochromatic blocks may have occurred during the recent phylogenesis of this genus.…”

Section: Eleutherodactylus Binotatusmentioning

confidence: 99%

Cytogenetics of three Brazilian species of Eleutherodactylus (Anura, Leptodactylidae) with 22 chromosomes and re-analysis of multiple translocations in E. binotatus

2004

View full text Add to dashboard Cite

In this paper, we provide a cytogenetic analysis of Eleutherodactylus guentheri, E. parvus and E. binotatus. All of the species had a diploid chromosomal number of 2n = 22. The karyotypes of E. guentheri and E. parvus were very similar and differed only slightly in the morphology of pair 2. These two species also had an NOR-bearing secondary constriction on the long arms of pair 6. The karyotype of E. binotatus differed from those of E. guentheri and E. parvus in the morphology and size of the chromosomes, in the number of chromosomal arms, in the NOR location (detected on the short arms of pair 1), and in the pattern of heterochromatin. These results reinforce the differences between E. guentheri and E. binotatus and support the existence of two species group. Five individuals of E. binotatus showed morphs for pairs 2 and 3. These morphs probably arose from the translocation of a segment from one chromosome of pair 3 to a homologue of pair 2. In addition, some mitotic metaphases of E. binotatus showed spontaneous chromosomal breaks which suggested that there were sites of fragility. Meiotic diakinesis showed multiple chromosomal rings, indicating the occurrence of multiple translocations, as previously reported by other investigators. These data suggest that, in addition to fission and fusion, other chromosomal rearrangements were probably involved in the differentiation of the karyotypes of these species of Eleutherodactylus, especially E. binotatus.

show abstract

Section: Eleutherodactylus Binotatusmentioning

confidence: 99%

Cytogenetics of three Brazilian species of Eleutherodactylus (Anura, Leptodactylidae) with 22 chromosomes and re-analysis of multiple translocations in E. binotatus

2004

View full text Add to dashboard Cite

show abstract

“…At least one species (E. jasperi) is viviparous and at least two (E. jasperi, E. coqui) have internal fertilization (Townsend and Stewart, 1985;Duellman and Trueb, 1986). Evolutionary relationships in the genus are very complex because of the overwhelming number of species, the high intraspecific variation in many species, and the lack of taxonomic characteristics that can be applied to all species over their entire ranges (for references see Bogart, 1981).…”

confidence: 99%

Chromosome banding in Amphibia

Schmid

Feichtinger

Steinlein

et al. 2002

Cytogenet Genome Res

View full text Add to dashboard Cite

A 15-year cytogenetic survey on one population of the leaf litter frog Eleutherodactylus maussi in northern Venezuela confirmed the existence of multiple XXAA♂/XAA^Y♀ sex chromosomes which originated by a centric (Robertsonian) fusion between the original Y chromosome and an autosome. 95% of the male individuals in this population are carriers of this Y-autosome fusion. In male meiosis the XAA^Y sex chromosomes pair in the expected trivalent configuration. In the same population, 5% of the male animals still possess the original, free XY sex chromosomes. In a second population of E. maussi analyzed, all male specimens are characterized by these ancestral XY chromosomes which form normal bivalents in meiosis. E. maussi apparently represents the first vertebrate species discovered in which a derived Y-autosome fusion still coexists with the ancestral free XY sex chromosomes. The free XY sex chromosomes, as well as the multiple XA^Y sex chromosomes are still in a very primitive (homomorphic) stage of differentiation. With no banding technique applied it is possible to distinguish the Y from the X. DNA flow cytometric measurements show that the genome of E. maussi is among the largest in the anuran family Leptodactylidae. The present study also supplies further data on differential chromosome banding and fluorescence in situ hybridization experiments in this amphibian species.

show abstract

“…Robertsonian changes (fusions, fissions) and tranlocations have been proposed by Morescalchi (1973) and Bogart (1981) to explain the karyotypic evolution of frogs. Among the members of Alsodes genus A. nodosus is remarkable by having a unique karyotype with 22 biarmed chromosomes.…”

Section: Standard Karyotype C-band Distribution and Ag-nors Of A Bmentioning

confidence: 98%

Novel diploid number and chromosomal formula in a South American frog of the genus Alsodes (Amphibia, Leptodactylidae)

Cuevas

Formas

2005

Italian Journal of Zoology

View full text Add to dashboard Cite

A new diploid number (2n = 30, NF = 52), chromosomal formula (22 biarmed and eight uniarmed chromosomes), C-banding pattern, and number and distribution of NORs (long arm of pair 4, submetacentric) are described for a member of the frog genus Alsodes (A. aff. valdiviensis) from southern Chile. The C-banding pattern and the number and distribution of NORs (long arm of pair 4, submetacentric) of A. barrioi are also described for the first time. These karyotypic characteristics are compared with those of other Alsodes species and members of the Eupsophus roseus group of species. The karyotypic evolution of the genus Alsodes is discussed.

show abstract

Chromosome studies in Sminthillus from Cuba and Eleutherodactylus from Cuba and Puerto Rico (Anura: Leptodactylidae)

Cited by 23 publications

References 12 publications

Cytogenetics of three Brazilian species of Eleutherodactylus (Anura, Leptodactylidae) with 22 chromosomes and re-analysis of multiple translocations in E. binotatus

Cytogenetics of three Brazilian species of Eleutherodactylus (Anura, Leptodactylidae) with 22 chromosomes and re-analysis of multiple translocations in E. binotatus

Chromosome banding in Amphibia

Novel diploid number and chromosomal formula in a South American frog of the genus Alsodes (Amphibia, Leptodactylidae)

Contact Info

Product

Resources

About