News & Updates
Decommission of the U.S. Y-STR Database
U.S. Y-STR Database haplotypes have been permanently transferred to the Y-Chromosome Haplotype Reference Database (YHRD) for continuance of usage, and the U.S. Y-STR Database will be decommissioned (scheduled for June 30, 2019). Further details can be found at here, including a YHRD Users Guide to enable the user to access SWGDAM compliant data output.(posted 7 months ago)
In the course of this update we used a new tool for pairwise comparison of all 1251 population samples in order to identify possible data overlaps of high-resolution haplotypes. We identified a very small number of datasets (see release history) which were submitted twice under different names. We have erased or updated these submissions. For the US database a theta-corrected match probability calculation is now available when selecting the feature “National Database (with Subpopulations, 2014 SWGDAM-compliant)” (according to SWGDAM guidelines 2014).(posted 8 months ago)
Release 58: USYSTR database now live at YHRD
Based on the descision of the Lineage Marker Committee of SWGDAM the complete US YSTR database (release 4.2.1) is transferred from usystr.org and included in the YHRD. US colleagues can analyze Y-STR profiles according to the current SWGDAM guidelines of 2014 including theta correction und one-sided confidence interval. Please note that the new guidelines in Germany (2018) recommend the DL values to calculate match probabilities. These values are recalculated from release to release for all 33 metapopulations. Overall the YHRD database increases again drastically with now >250k haplotypes (1221 population samples from 135 countries).(posted 10 months ago)
We apologize for the downtime of the YHRD due to a severe server problem. The database went back to work at August 13, 2018, 10:30 am.(posted 11 months ago)
We are proud to announce the latest release of the YHRD: Release R57. More than 9000 YFiler were added to the database and thus summing up to 216,562 minimal and 165,261 YFiler haplotypes worldwide. Please see our Release History for further information on particular submissions.
Additionally an important update on the Discrete Laplace frequency estimation method is part of this release: We have re-calculated the best number of haplotype centers for each Metapopulation. This was not done since release R55, because it takes roughly 3 months on a 16-node cluster and therefore cannot be performed on a regular basis. Please see Discrete Laplace specification of appropriate Metapopulations at the Calculation Summary page.