title: Automictic and apomictic parthenogenesis in psocids (Insecta: Psocoptera).
abstract: Karyotypes and meiosis patterns in three obligatory thelytokous Psocoptera species have been studied for the first time. Females of Aaroniella badonneli (Danks) display 9 chiasmatic bivalents in oocyte metaphase I (2n = 18), hence meiosis is of the automictic type. Females of Ectopsocus meridionalis Ribaga and Valenzuela sp. display 3n = 27, and 27 univalent chromosomes are present in oocyte metaphase I. Thus, meiosis in these species is of the apomictic type.
authors.affiliation: Laboratory of Genetics, Department of Biology, University of Turku, FIN-20014, Turku, Finland. seppo.nokkala@utu.fi
authors.forename: Seppo
authors.initials: S
authors.lastname: Nokkala
authors.forename: Natalia V
authors.initials: NV
authors.lastname: Golub
mesh_terms: D000818:Animals; D005260:Female; D007313:Insecta / Q000235:genetics / Q000502:physiology*; D007621:Karyotyping; D008540:Meiosis / Q000235:genetics / Q000502:physiology; D010312:Parthenogenesis / Q000502:physiology*