Using Snp Weights To Test For Admixture Dates Using Alder

Question

[Javier2013]

Hi everyone:

I am using the software ALDER to estimate admixture dates using genome-wide data (SNPs). I have seen that in most articles instead of using the allele frequency differentiation between the ancestral populations, the weights for each SNP is used to run the program.

Does anyone know how to get those weights? Using a PCA maybe?

Thanks in advance