Please note that while introgress does a fine job at summarizing
and detecting variation in introgression among loci, it does not
necessarily lead to strong inferences about the causes of the
variation (e.g., detection of selected loci). For example,
variation can arise due to genetic drift and does so commonly
under certain reasonable conditions. For detecting expectionally
differentiated loci, with less sensititivity to genetic drift,
we suggest using bgc. Please see Gompert and Buerkle 2012 for a
comparison of bgc and introgress. In both cases please be aware
of the mutliple evolutionary processes that can lead to
expectional differentiation. - Gompert, Z. and C. A. Buerkle.
2009. A powerful regression-based method for admixture mapping
of isolation across the genome of hybrids. Molecular Ecology 18:
1207-1224 - Gompert, Z. and C. A. Buerkle. 2010. introgress: a
software package for mapping components of isolation in hybrids.
Molecular Ecology Resources 10: 378-384 (article). Installing
the package is simp