Desiccation tolerance and Starvation resistance exhibit opposite altitudinal cline in Indian populations of Drosophila immigrans

Order of Publishing in Issue: 
10
Volume :1
Issue :1
October, 2007
Page No: 
106-111
Authors: 
Manvender Singh*, Pankaj K.Tyagi and Shruti
Address: 
Molecular Genetics Research Laboratory, Department of Biotechnology, N. C. College of Engineering , Israna, Panipat-132107
Email-ID: 
pktgenetics@gmail.com

Altitudinal variations in desiccation tolerance and starvation resistance in D.immigrans populations are organized into adaptive clines.D.immigrans populations are characterized by increase in desiccation while starvation decreases and such opposite clines match climatic conditions.Regression analysis helps in explaining such adaptations. Upto now, there is no detailed data on altitudinal clines in Drosophila speciesand populations. Present data on genetic differentiation in D.immigrans populations evidence that such geographical clines are adaptive andmaintained due to environmental gradients along the altitude.

Keywords: 
Starvation resistance, desiccation tolerance, clinal patterns, altitudinal populations and D.immigrans.
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