Automictic and apomictic parthenogenesis in psocids (Insecta: Psocoptera)
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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.
Publication order reference
S. Nokkala, Laboratory of Genetics, Department of Biology, University of Turku, FIN-20014, Turku, Finland