Inversion polymorphism in Southeast Asian populations of theDrosophila nasutasubgroup

✍ Scribed by M. Clyde

• Book ID: 104632841
• Publisher: Springer Netherlands
• Year: 1982
• Tongue: English
• Weight: 979 KB
• Volume: 58
• Category: Article
• ISSN: 0016-6707
• DOI: 10.1007/bf00128011

✦ Synopsis

Heterozygosity

for chromosomal arrangements was investigated in four species of the nasuta complex. D. sulfurigaster albostrigata, D. albomicans and D. kohkoa are highly polymorphic whereas D. puluua is monomorphic.

Inversions were identified with the aid of photographic chromosome maps. The geographic distribution and frequencies of inversions detected and their possible phylogenies were discussed. Most inversions in D.s. aibostrigata and D. albomicans occur on chromosome IIL. In D. kohkou there is marked preponderance of inversions on chromosome III. Ken-random association of certain inversions was noted. Variation in frequencies of inversions is intcrprcted as a result of adaptation to local ecogeographic conditions. Shared extant polymorphisms indicate phylogenetic relationships between species.