POLYTENE CHROMOSOME RELATIONSHIPS OF 5 SPECIES OF THE ANOPHELES-DIRUSCOMPLEX IN THAILAND

Photographic maps and rearrangements of each salivary gland polytene c hromosome arm of Anopheles nemophilous (species F) and of An. dirus sp ecies A, B, C, and D of the Dirus group from natural populations in Th ailand are presented. Structural conformation of heterokaryotypes and comparison of chromosome banding sequences reveal IO paracentric inver sions. The data on fixed inversion of 3Rb and inversion polymorphism o f the X chromosome shared by these species were used to construct a ph ylogeny of the five members of the An. dirus complex, thereby outlinin g their patterns of speciation through chromosomal rearrangements.