Visut BaimaiMahidol University2018-04-302018-04-301980-01-01The Japanese Journal of Genetics. Vol.55, No.3 (1980), 165-1750021504X2-s2.0-0019208438https://repository.li.mahidol.ac.th/handle/20.500.14594/11081A total of 20 species in the Drosophila montium subgroup has been cytologically examined. All species show similar basic pattern of metaphase karyotype. The most extensive variations in metaphase chromosome configurations have been observed in the Y and 4th (dot) chromosomes while the X chromosome is slightly variable. Interspecific karyotype differentiation is largely due to the acquisition of different amounts of heterochromatin. © 1980, The Genetics Society of Japan. All rights reserved.Mahidol UniversityBiochemistry, Genetics and Molecular BiologyArticleSCOPUS10.1266/jjg.55.165