In situ hybridisation applied to chromosomes of orchid species. Blue DAPI staining shows chromosomal DNA (A, D, G, respectively Ophrys tenthredinifera, Serapias vomeracea and Himantoglossum hircinum); red and green signals show sites of hybridisation of 18S-25S rDNA and 5S rDNA respectively (B, E, H, C, F, I). Arrows indicate sites. Ophrys tenthredinifera ( B) three 18S-25S rDNA sites and (C) four 5S rDNA sites. Serapias vomeracea (E) six 18S-25S rDNA sites and (F) four 5S rDNA sites. Himantoglossum hircinum (H) four 18S-25S rDNA sites and (I) four 5S rDNA sites.

 
 
  Part of: Turco A, Albano A, Medagli P, Wagensommer RP, D'Emerico S (2021) ´╗┐Comparative chromosome studies in species of subtribe Orchidinae (Orchidaceae). Comparative Cytogenetics 15(4): 507-525. https://doi.org/10.3897/compcytogen.v15.i4.75990