(Dec 29, 2025): A sum of 14,351 new QTL/associations have been curated into the database. (New additions less obsolete/retracted ones: Cattle: 12,986; Chicken: 0; Goat: 80; Horse: 54; Pig: 932; Sheep: 299; Rainbow trout: 0 -- Net increase: 14,351). To date, the current total number of QTL in the database: 310,879 [Breakdown by species -- Cattle: 207,081 (on 560 traits); Chicken: 29,328 (on 243 traits); Goat: 2,793 (on 90 traits); Horse: 2,545 (on 71 traits); Pig: 58,344 (on 409 traits); Sheep: 8,587 (on 185 traits); Rainbow trout: 2,201 (on 35 traits)] curated from 3,015 publications.
( This is a joint release with the 26th CorrDB release.)

In addition, data updates on 17 QTL/SNP associations, 94 base traits, and 3,987 trait variants were made on, or linked with, previously released data.

Database developments notes:
(1) As genome assemblies and SNP mappings continue to improve, older genome builds are becoming outdated, reflected by a gradual decline in the number of SNPs mapped to them over time. As a result, We plan to decommission the support of following genome builds in the future data release: cattle - BTAU4; chicken - GG4; pig - SS10; sheep - OAR3; rainbow trout - OM1_0 and OM1_1. If you have any concerns about this move, please let us know. (2) We have added a new sheep genome build (OAR_rambo3) for QTL/association data liftover. (3) We are experimenting adding Ensembl annotated genes to the QTL/SNP associations by their mapping proximity. As there are large variations in the mapping proximity where a QTL/SNP association linked mutation can affect the expression of a gene, this experiment can be challenging. We will be happy to hear your inputs on useful approaches.

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