| unraveling the sex chromosome heteromorphism of the paradoxical frog pseudis tocantins. | the paradoxical frog pseudis tocantins is the only species in the hylidae family with known heteromorphic z and w sex chromosomes. the z chromosome is metacentric and presents an interstitial nucleolar organizer region (nor) on the long arm that is adjacent to a pericentromeric heterochromatic band. in contrast, the submetacentric w chromosome carries a pericentromeric nor on the long arm, which is adjacent to a clearly evident heterochromatic band that is larger than the band found on the z chr ... | 2016 | 27214234 |
| satellite dna mapping in pseudis fusca (hylidae, pseudinae) provides new insights into sex chromosome evolution in paradoxical frogs. | in the frog genus pseudis, previous works found a sex-linked heteromorphism of the pcp190 satellite dna in the nucleolus organizer region (nor)-bearing chromosome pairs of pseudis bolbodactyla and pseudis tocantins, which possess a zz/zw sex determination system. a pericentromeric inversion was inferred to have occurred during w chromosome evolution, moving a chromosomal cluster enriched by the pcp190 from the short arm (as observed in p. bolbodactyla) to the nor-bearing long arm (as observed in ... | 2019 | 30791490 |
| cytogenetic analysis of four species of pseudis (anura, hylidae), with the description of zz/zw sex chromosomes in p. tocantins. | pseudis paradoxa paradoxa, p. p. platensis, p. bolbodactyla, p. fusca and p. tocantins were analyzed cytogenetically by conventional chromosomal staining, c-banding, silver staining and fluorescent in situ hybridization with an rdna probe. pseudis tocantins chromosomes were also stained with distamycin a/dapi. all of the species had a diploid number of 2n = 24 chromosomes and the nucleolar organizer region (nor) was located on pair 7. however, the karyotypes could be differentiated based on the ... | 2008 | 17713858 |