The first cytogenetic report on Laena reitteri Weise, 1877 (Coleoptera, Tenebrionidae, Lagriinae) with notes on karyotypes of darkling beetles.
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.
Holecová
Milada
M
Department of Zoology, Comenius University, Mlynská dolina B-1, 842-15 Bratislava, Slovakia. holecova@fns.uniba.sk
Rozek
Maria
M
Lachowska
Dorota
D
D000818:Animals; D002875:Chromosomes / Q000235:genetics*; D001517:Coleoptera / Q000235:genetics*; D007621:Karyotyping; D013045:Species Specificity