Comparative FISH mapping of ribosomal DNA clusters and TTAGG telomeric sequences to holokinetic chromosomes of eight species of the insect order Psocoptera
| Autor: | Valentina G. Kuznetsova, Natalia V. Golub, Boris A. Anokhin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Insecta Arthropoda lcsh:QH426-470 Short Communication Eastern Europe Plant Science psocids 010603 evolutionary biology 01 natural sciences Stenopsocidae Russia Telomere organization Philotarsidae (TTAGG)n 03 medical and health sciences FISH Molecular Cytogenetics Genetics Animalia meiosis Psocomorpha Caeciliusidae Ribosomal DNA Invertebrata Psocoptera biology 18S rDNA Hexapoda Karyosystematics Psocidae biology.organism_classification Europe lcsh:Genetics 030104 developmental biology holokinetic chromosomes Evolutionary biology Animal Science and Zoology Peripsocidae Biotechnology |
| Zdroj: | Comparative Cytogenetics, Vol 13, Iss 4, Pp 403-410 (2019) Comparative Cytogenetics |
| Popis: | Repetitive DNAs are the main components of eukaryotic genome. We mapped the 18S rDNA and TTAGG telomeric probe sequences by FISH to meiotic chromosomes of eight species of the order Psocoptera considered a basal taxon of Paraneoptera: Valenzuela burmeisteri (Brauer, 1876), Stenopsocus lachlani Kolbe, 1960, Graphopsocus cruciatus (Linnaeus, 1768), Peripsocus phaeopterus (Stephens, 1836), Philotarsus picicornis (Fabricius, 1793), Amphigerontia bifasciata (Latreille, 1799), Psococerastis gibbosa (Sulzer, 1766), and Metylophorus nebulosus (Stephens, 1836). These species belong to five distantly related families of the largest psocid suborder Psocomorpha: Caeciliusidae, Stenopsocidae, Peripsocidae, Philotarsidae, and Psocidae. We show that all the examined species share a similar location of 18S rDNA on a medium-sized pair of autosomes. This is the first study of rDNA clusters in the order Psocoptera using FISH. We also demonstrate that these species have the classical insect (TTAGG)n telomere organization. Our results provide a foundation for further cytogenetic characterization and chromosome evolution studies in Psocoptera. |
| Databáze: | OpenAIRE |
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