Inversion Polymorphism in Two Populations of Drosophila melanogaster in Lagos State, Nigeria
No Thumbnail Available
Date
2010
Authors
Adefenwa, M.A.
Williams, G.O.
Oboh, B.O.
Adekoya, K.O.
Journal Title
Journal ISSN
Volume Title
Publisher
UNILAG _ Journal of Scientific Research and Development
Abstract
Two different natural populations of Drosophila melanogaster were surveyed to determine the types of
inversions present by examining the salivary gland chromosomes of third instar larvae. Seven different
inversions were detected in populations, Tejuosho market and Bariga market (Lagos, south-western
Nigeria) populations. All inversions detected were single, paracentric and autosomal. The inversions
observed were distributed in the arms of the chromosomes as follows: two in the left arm of chromosome
2 (2L), one in the right arm of chromosome 2 (2R), two in the left arm of chromosome 3 (3L) and two in
the right arm of chromosome 3 (3R). Some inversions occurred together with other inversions in the same
larva and this occurrence was probably just due to chance but also indicates that such conditions were
not lethal.
Some of the inversions detected in this study had been recorded by earlier researchers in some parts of
south-eastern Nigeria and south-western Nigeria. The occurrence of similar inversions in these regions
may be evidence that the inversions are not recent. This similarity in inversions also suggests that there is
or had been migration from one place to the other or the inversions originated somewhere else and had
been transported to other places.
Description
Keywords
Inversion , Drosophila melanogaster , populations , migration , lethal
Citation
Adefenwa, M.A., Williams, G.O., Oboh, B.O. and Adekoya, K.O. (2010): Inversion polymorphism in two populations of Drosophila melanogaster in Nigeria. Journal of Sci. Res. Dev. 12 (1) : 53-64.