From Genome Analysis Wiki
Jump to navigationJump to search
148 bytes removed
, 13:12, 30 May 2012
Line 163: |
Line 163: |
| | | |
| = Imputation = | | = Imputation = |
− |
| |
− | There are two choices for imputation step: imputing from best-guess haplotypes and imputing from a sample of alternate haplotype configurations.
| |
| | | |
| Below is a lightly modified version of script “prototype_imputation_job_best_guess_haps.sh” that accomplishes imputation. The original script is included in the package of [http://mathgen.stats.ox.ac.uk/impute/prephasing_and_imputation_with_impute2.tgz IMPUTE2 examples]. This version has been modified to reference the most recent set of 1000 Genome Haplotypes (currently, the Phase I integrated haplotypes [http://mathgen.stats.ox.ac.uk/impute/data_download_1000G_phase1_integrated.html available from the IMPUTE2 website]) and to include the <code>-seed</code> parameter, which ensures results can be reproduced by running the script again. | | Below is a lightly modified version of script “prototype_imputation_job_best_guess_haps.sh” that accomplishes imputation. The original script is included in the package of [http://mathgen.stats.ox.ac.uk/impute/prephasing_and_imputation_with_impute2.tgz IMPUTE2 examples]. This version has been modified to reference the most recent set of 1000 Genome Haplotypes (currently, the Phase I integrated haplotypes [http://mathgen.stats.ox.ac.uk/impute/data_download_1000G_phase1_integrated.html available from the IMPUTE2 website]) and to include the <code>-seed</code> parameter, which ensures results can be reproduced by running the script again. |
Line 220: |
Line 218: |
| Filtering Option -filt_rules_l is used in this example to remove reference SNPs with MAF=0 in European reference panel (for example, a European cohort). | | Filtering Option -filt_rules_l is used in this example to remove reference SNPs with MAF=0 in European reference panel (for example, a European cohort). |
| | | |
− | The syntax for starting each of these jobs would be similar for the phasing jobs and, again, you should use a suitable grid or cluster engine to submit multiple jobs in parallel. | + | The syntax for starting each of these jobs would be similar for the phasing jobs and, again, you should use a suitable grid or cluster engine to submit multiple jobs in parallel. |
− | | |
| | | |
| = X-Chromosome Imputation = | | = X-Chromosome Imputation = |