title: The first cytogenetic report on Laena reitteri Weise, 1877 (Coleoptera, Tenebrionidae, Lagriinae) with notes on karyotypes of darkling beetles.
abstract: The karyotype structure of Laena reitteri is described for the first time. The chromosome number 2n = 18+1-3B and meioformula n(male) = 8+Xy+1-3B deviates from the modal tenebrionid number. The karyotype exhibits low variation in morphology and length. The diploid set consists of four long (subtelocentric and acrocentric), twelve medium-sized acrocentric autosomes and sex heterochromosomes Xy. The X chromosome is submetacentric, while the y is acrocentric and the smallest element of the set. On mitotic and meiotic plates 1-3 small additional elements are also visible, and probably represent B-chromosomes. The NORs are very active at mitotic prophase and early meiotic stages.
authors.affiliation: Department of Zoology, Comenius University, Mlynská dolina B-1, 842-15 Bratislava, Slovakia. holecova@fns.uniba.sk
authors.forename: Milada
authors.initials: M
authors.lastname: Holecová
authors.forename: Maria
authors.initials: M
authors.lastname: Rozek
authors.forename: Dorota
authors.initials: D
authors.lastname: Lachowska
mesh_terms: D000818:Animals; D002875:Chromosomes / Q000235:genetics*; D001517:Coleoptera / Q000235:genetics*; D007621:Karyotyping; D013045:Species Specificity