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- Title
New insights into the chromosomes of stoneflies: I. Karyotype, C-banding and localization of ribosomal and telomeric DNA markers in Skwala compacta (McLachlan, 1872) (Polyneoptera, Plecoptera, Perlodidae) from Siberia.
- Authors
Bugrov, Alexander; Karamysheva, Tatyana; Buleu, Olesya
- Abstract
This study provides data on chromosome number (2n♂♀=26), sex determination mechanism (XY♂/XX♀), C-banding pattern, distribution of clusters of telomeric TTAGG repeats and 18S ribosomal DNA in the karyotype of the stonefly Skwala compacta (McLachlan, 1872). For the first time in the history of stoneflies cytogenetics, we provide photos of the chromosomes of the Plecoptera insects. The karyotype of males and females of S. compacta consists of 12 pairs of autosomes. Three pairs of large autosomes and four pairs of medium-sized autosomes are subacrocentric. The remaining pairs of autosomes are small, with unclear morphology. Pericentromeric C-bands were revealed in all autosomes. The sex chromosomes are also subacrocentric. The short arms of X and Y chromosomes are entirely heterochromatic and are rich in ribosomal DNA sequences. In the X chromosome this arm is larger than in the Y chromosome. It is likely that this arm associated with the nucleolar organizer (NOR). Telomeric DNA (TTAGG)n repeats were detected in the terminal regions of all chromosomes.
- Subjects
SEX chromosomes; Y chromosome; SEX determination; X chromosome; RIBOSOMAL DNA; KARYOTYPES
- Publication
Comparative Cytogenetics, 2024, Vol 18, p15
- ISSN
1993-0771
- Publication type
Academic Journal
- DOI
10.3897/compcytogen.18.115784