Evolution of the obscura group drosophila species. I. Salivary chromosomes and quantitative characters in D. Subobscura and two closely related species

Abstract

Three closely related Drosophila species of the “obscura” group have been examined: Dropophilo madeirensis, D. guanche and D. subobscura. Some crosses are possible between them and F1 progeny were used in order to clarify chromosomal homologies. D. madeirensis has the following constitution in relation to D. subobscura: Am+1; JST; EST: O3; U1+2 while D. guanche has: Am+g; Jg; Eg; (where m and g indicate inversions specific to those species). Some data are also presented on the inheritance of eight different quantitative characters used by some taxonomists to differentiate other palearctic obscura group species. © 1984 The Genetical Society of Great Britain.