Gokhman V.E.1, Nugnes F.2, Bernardo U.2 2019. A cytogenetic study of Baryscapus silvestrii Viggiani et Bernardo, 2007 (Hymenoptera: Eulophidae) using base-specific fluorochrome staining // Russian Entomol. J. Vol.28. No.2: 180–182 [in English].
1 Botanical Garden, Moscow State University, Moscow, Russia. E-mail: email@example.com
2 Institute for Sustainable Plant Protection, Italian National Research Council, Portici (Napoli), Italy.
ABSTRACT. Chromosomes of Baryscapus silvestrii Viggiani et Bernardo, 2007 (Eulophidae) with n = 6 and 2n = 12 were studied using base-specific fluorochrome staining. Chromomycin A3 / 4', 6-diamidino-2-phenylindole (CMA3/DAPI) staining revealed a single paired CMA3-positive band within the diploid karyotype of B. silvestrii. This CG-rich segment apparently corresponds to the nucleolus organizing region (NOR). Certain features of karyotype evolution of parasitoids of the family Eulophidae are discussed.
KEY WORDS. Parasitoids, chromosomes, karyotypes, NORs, CMA3, DAPI.