Population Cytology of the Genus Phaulacridium V. Ph. marginale ? The Omarama Population

Abstract

During the 1975 meiotic season a sample of 105 Ph. marginale males was collected from Omarama (South Island, New Zealand). This population is polymorphic for a small metacentric B chromosome (BM) and for extra segments on the three smallest autosomes. Only 10% of males have the basic karyotype. Previous collections from this population had similar frequencies of the BM chromosomes and of the extra segments.