Localization of FISH signals on telomeres (red) and rDNA clusters (green) in squash chromosome preparations of seven species of Polyommatus (subgenus Agrodiaetus). Chromosomes are counterstained with DAPI. Note telomeric signals of different intensity. 1–7 one 18S rDNA cluster is found 8 two 18S rDNA clusters are found 1P. (A.) caeruleus, MII 2–3P. (A.) hamadanensis, MI cells from two different populations with different karyotypes (n=19 and n=21 accordingly) 4P. (A.) karindus, MII 5P. (A.) morgani, MI 6P. (A.) peilei, MII 7P. (A.) pfeifferi, MII 8P. (A.) sennanensis, MII. The inset in the upper right corner shows twice enlarged image of rDNA-carrying chromosomes.

 
 
  Part of: Vershinina A, Anokhin B, Lukhtanov V (2015) Ribosomal DNA clusters and telomeric (TTAGG)n repeats in blue butterflies (Lepidoptera, Lycaenidae) with low and high chromosome numbers. Comparative Cytogenetics 9(2): 161-171. https://doi.org/10.3897/CompCytogen.v9i2.4715