Allozyme variation in Greek wild populations ofDrosophila melanogasterandD. simulansalong a North-South gradient

✍ Scribed by C. D. Triantaphyllidis; Z. G. Scouras; J. N. Panourgias; G. C. Ioannidis

• Publisher: Springer Netherlands
• Year: 1982
• Tongue: English
• Weight: 513 KB
• Volume: 58
• Category: Article
• ISSN: 0016-6707
• DOI: 10.1007/bf00056780

✦ Synopsis

Allozyme frequency data from five Greek wild sympatric populations of Drosophila melanogaster and D. simulans along a North-South gradient were analyzed for genotype-environment relationships. The regression coefficient of genetic distance on geographic distance indicates that there is a significant relationship between these parameters for D. melanogaster only. Highly significant differences in specific alleles at certain loci were found between the various local populations studied. The changes in otGpdh F of D. melanogaster and Est-6 F of D. simulans exhibited clinal patterns in allele frequencies. In addition, analysis of D. melanogaster aGpdh F and Adh F allele frequencies shows that the Greek data do not have regression coefficients (regressing allele frequency on degrees North of latitude) of the same sign as East-and West-Coast United-States populations. These contradictory data are discussed in relation to what is known about the maintenance of the Adh and aGpdh polymorphisms.