ANGSD: Analysis of next generation Sequencing Data
Latest tar.gz version is (0.938/0.939 on github), see Change_log for changes, and download it here.
PCA: Difference between revisions
No edit summary |
No edit summary |
||
| Line 12: | Line 12: | ||
= single read sampling = | = single read sampling = | ||
Both PCA and MDS can be performed based on sampling of a single read at each site. This can work even with very low depth data e.g. <1X. This method can be [[PCA_MDS | Both PCA and MDS can be performed based on sampling of a single read at each site. This can work even with very low depth data e.g. <1X. This method can be found here:[[PCA_MDS]]. However, it requires low error rate and polymorphic sites need to be inferred (or provided by user) | ||
Revision as of 12:23, 27 April 2016
Genotype likelihood approach
Matteo Fumagallis methods for doing PCA/Covariance based on ANGSD output files:
Fumagalli, M, Vieira, FG, Korneliussen, TS, Linderoth, T, Huerta-Sánchez, E, Albrechtsen, A, Nielsen, R (2013). Quantifying population genetic differentiation from next-generation sequencing data. Genetics, 195, 3:979-92.
This works without the need to call SNPs or genotypes based on genotype likelihoods
The main documentation for this is found here: https://github.com/mfumagalli/ngsTools and here https://github.com/mfumagalli/ngsTools#ngscovar
single read sampling
Both PCA and MDS can be performed based on sampling of a single read at each site. This can work even with very low depth data e.g. <1X. This method can be found here:PCA_MDS. However, it requires low error rate and polymorphic sites need to be inferred (or provided by user)