Principal components analysis of SNP data

Question

[Abdul Rafay Khan]

How many minimum snps are required to get reliable results from principal components analysis?

Answer 1

[Kevin Blighe]

One should not use general words like 'reliable' without qualifying what they mean. If you elaborate on what you have already performed and how you have performed it, then perhaps we can help a bit better. Note my tutorial where I generate a PCA bi-plot from 1000 Genomes samples: Produce PCA bi-plot for 1000 Genomes Phase III - Version 2