Affiliation:
1. Department of Karyosystematics, Zoological Institute, Russian Academy of Sciences, Universitetskaya emb. 1, 199034 St. Petersburg, Russia
2. Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016 Kraków, Poland
Abstract
The Lygaeoidea comprise about 4660 species in 790 genera and 16 families. Using standard chromosome staining and FISH with 18S rDNA and telomeric (TTAGG)n probes, we studied male karyotypes and meiosis in 10 species of Lygaeoidea belonging to eight genera of the families Blissidae, Cymidae, Heterogastridae, Lygaeidae, and Rhyparochromidae. Chromosome numbers were shown to range from 12 to 28, with 2n = 14 being predominant. All species have an XY system and all but one have a pair of m-chromosomes. The exception is Spilostethus saxatilis (Lygaeidae: Lygaeinae); in another species of Lygaeinae, Thunbergia floridulus, m-chromosomes were present, which represents the first finding for this subfamily. All species have an inverted sequence of sex chromosome divisions (“post-reduction”). The 18S rDNA loci were observed on one or both sex chromosomes in Kleidocerys resedae and Th. floridulus, respectively (Lygaeidae), while on an autosomal bivalent in all other species. The rDNA loci tended to be close to the end of the chromosome. Using (TTAGG)n—FISH, we were able to show for the first time that the Lygaeoidea lack the canonical “insect” telomere motif (TTAGG)n. We speculate that this ancestral motif is absent from the entire infraorder Pentatomomorpha being replaced by some other telomere repeat motif sequences.
Subject
Genetics (clinical),Genetics
Reference54 articles.
1. Panizzi, A.R., and Grazia, J. (2015). True Bugs (Heteroptera) of the Neotropics, Entomology in Focus 2, Springer.
2. Dellapé, P.M., and Henry, T.J. (2022, November 10). Lygaeoidea Species File. Version 5.0/5.0. Available online: http://Lygaeoidea.SpeciesFile.org/.
3. Ueshima, N. (1979). Animal Cytogenetics. Insecta 6. Hemiptera II: Heteroptera, Gebrüder Borntraeger.
4. Cytotaxonomy of the Lygaeidae (Hemiptera-Heteroptera);Ueshima;Univ. Kans. Sci. Bull.,1980
5. Notes on the karyotypes of some lygaeid bugs (Heteroptera, Pentatomomorpha, Lygaeidae);Grozeva;Folia Biol.,1993
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