Acta Zoologica Academiae Scientiarum Hungaricae, cilt.50, sa.1, ss.25-34, 2004 (SCI-Expanded, Scopus)
Genetically controlled colour polymorphism of the meadow spittlebug Philaenus spumarius in the populations of the Istranca Mountains was investigated. A total of 7,544 spittlebugs, 2,936 females and 4,608 males collected from three different types of deciduous forest were analysed. Four non-melanic - populi (POP), typicus (TYP), trilineatus (TRI), vittatus (VIT), - and four melanic - marginellus (MAR), lateralis (LAT), flavicollis (FLA), leucocephalus (LCE) - phenotypes expressed by six different alleles were determined. Melanic phenotypes were limited to the female sex only, moreover the melanic "O" group was not found in the 29 different populations sampled. POP+TYP were predominant phenotypes in the pooled samples (94%). The combined melanics and TRI+VIT were present at equal proportions (3% each). The average sample size for 40 sampling sessions was (Mean±S.E.) 187.1±14.3 (range: 31-361).