99764ad55bb121d285e9734de955bba41802ad06
max
  Wed Jul 15 23:35:19 2026 -0700
varFreqs: add gnomAD-Canada HostSeq SNV frequencies and fold into combined tracks, refs #36642

#Preview2 week - bugs introduced now will need a build patch to fix
New "hostseq" vcfTabix subtrack of the SNV Frequencies container:
gnomAD-Canada v1.0 / HostSeq, 10,487 Canadian COVID-19 WGS genomes on hg38.
The release ships only as a ~104 GB Hail table, so hostseqHtToVcf.py reads it
with Hail and flattens the freq array into a sites-only VCF with overall +
9 gnomAD ancestry-group AC/AN/AF, nhomalt, grpmax, dbSNP rsID and the variant
filter status. 232,028,491 release rows -> 213,382,086 written (18,646,405 AC0
sites dropped).

Registered HostSeq (is_disease=0) in databases.tsv and its 9 ancestry groups
in populations.tsv, and rebuilt varFreqsAffected/varFreqsBackground so HostSeq
feeds the background side (29 cohorts, 185 fields; merged set 1,374,129,993
variants). Added HostSeq to filterValues.backgroundSources.

diff --git src/hg/makeDb/scripts/varFreqs/databases.tsv src/hg/makeDb/scripts/varFreqs/databases.tsv
index fe84f46d450..fd9cafb6da8 100644
--- src/hg/makeDb/scripts/varFreqs/databases.tsv
+++ src/hg/makeDb/scripts/varFreqs/databases.tsv
@@ -36,15 +36,16 @@
 HRC	HRC	/gbdb/hg38/varFreqs/hrc/hrc.vcf.gz	AC	AF	0
 # MexBB and TPMI moved to the array-based track (databases_array.tsv): both are
 # genotyping-array cohorts and are kept out of the WGS/WES varFreqsAll track.
 SGDP	SGDP	/gbdb/hg38/varFreqs/sgdpFreq/sgdp.freq.vcf.gz	AC	AF	0			1
 HGDP1kG	gnomAD HGDP+1kG	/gbdb/hg38/varFreqs/hgdp1kFreq/hgdp1k.freq.vcf.gz	AC	AF	0
 GREGoR	GREGoR	/gbdb/hg38/varFreqs/gregor/gregor.vcf.gz	AC	AF	1
 SCHEMA	SCHEMA	/gbdb/hg38/varFreqs/schema/SCHEMA_variant_results_withAF.vcf.gz	AC	AF	1
 GA4K	GA4K PacBio LR	/gbdb/hg38/varFreqs/ga4k/ga4kSnv.vcf.gz	AC	AF	1	affected
 CoLoRSdb	CoLoRSdb PacBio LR	/gbdb/hg38/varFreqs/colorsDb/colorsDbSnv.vcf.gz	AC	AF	0
 SVatalog	SVatalog 101 10XG SR	/gbdb/hg38/varFreqs/svatalog/svatalog.vcf.gz	AC	AF	0			1
 Tishkoff180	Tishkoff 180 African WGS	/gbdb/hg38/varFreqs/_tishkoff/tishkoff180.vcf.gz	AC	AF	0
 WBBC	WBBC China	/gbdb/hg38/varFreqs/wbbc/wbbc.vcf.gz	AC	AF	0
 ChinaMAP	China ChinaMAP	/gbdb/hg38/varFreqs/_chinamap/chinamap.vcf.gz	AC	AF	0
 GenomeIndia	GenomeIndia 9.7k WGS	/gbdb/hg38/varFreqs/_genomeindia/genomeindia.vcf.gz	AC	AF	0
 GoNL	GoNL Netherlands ~13x SR	/gbdb/hg38/varFreqs/gonl/gonl.vcf.gz	AC	AF	0
+HostSeq	HostSeq Canada	/gbdb/hg38/varFreqs/hostseq/hostseq.vcf.gz	AC	AF	0