Release 59
(Apr 20, 2026)

Chicken QTLdb data summary

As of Apr 20, 2026, there have been 30,465 QTL / eQTL / associations released for public access on the Chicken QTLdb. These data were curated from 423 publications and represent 244 base traits, 283 trait variants, and 40 eQTL genes.

Data summary selector:

of trait names by their frequency in QTL/association reports

Trait variants with the most curated data

Trait variants	Number of QTL
Body weight at 42 days	420,947
Body weight at 70 days	359,345
Body weight at 56 days	328,544
Body weight at 84 days	297,743
Body weight at 28 days	277,209
Body weight at 35 days	225,874
Body weight at 21 days	205,340
Body weight at 14 days	184,806
Body weight at hatch	174,539
Body weight at 49 days	164,272
Body weight at 63 days	164,272
Body weight at 77 days	102,670
Body weight at 112 days	92,403
Body weight at 7 days	82,136
Body weight at first egg	82,136
Body weight at 98 days	71,869
Body weight at 40 days	61,602
Body weight at 140 days	41,068
Body weight at 41 days	41,068
. . .	. . .

NOTE: On this site, the term "QTL" may have collectively included quantitative loci, SNP associations, and eQTL data.

© 2003-2026: USA · USDA · NRPSP8 · Program to Accelerate Animal Genomics Applications. Contact: Bioinformatics Team