Inversion Polymorphisms and Natural Selection in Trimerotropis Pallidipennis (Orthoptera): Correlations with Geographical Variables

Abstract

T. pallidipennis populations from Argentina show an extensive variability for pericentric inversions involving different chromosome pairs. Partial and multiple regression analyses of inversion frequencies from 17 samples from different altitudes, latitudes, and longitudes show almost identical patterns of chromosomal variation in two altitudinal gradients assayed separately, and also in a joint analysis with all samples, including single ones from distant regions. The results show that natural selection maintains the clines. Copyright © 1994, Wiley Blackwell. All rights reserved