Release 36
(Aug 22, 2018)
This Chicken Quantitative Trait Locus (QTL) Database (Chicken QTLdb) contains chicken QTL and association data curated from published data. The database is designed to facilitate the process for users to compare, confirm, and locate the most plausible location for genes responsible for quantitative traits important to chicken production. We have been striving our best to curate all available data, and adding tools to the QTLdb for users to accomplish many data meta-analysis and comparison tasks.

The current release of the Chicken QTLdb contains 10,817 QTLs/associations from 293 publications. Those QTLs / associations represent 402 different traits (see data summary for more recent updates). The released data have also been submitted to the NCBI Gene, Ensembl, and UCSC databases, where the QTL information can be retrieved and analyzed using the respective tools on these sites. New tools and functions are continually added. Please see the release history or FAQ for new updates.


Information in the Chicken QTLdb can be accessed in the following ways:
1. Search Tools: Search by chromosomes, traits, breeds, publications, candidate genes, etc. and tools for data analysis by search
2. Browse Tools:
  • By chromosome locations
  • By chicken trait hierarchies
3. View Maps:
5. Data Summary: Database statistics by chromosomes, traits, trait types, journals, publication years, etc.
QTL on
- Gbrowse
- Jbrowse
New Data
- Curation
- Batch load
Zhi-Liang Hu, Carissa A. Park, and James M. Reecy (2019). Building a livestock genetic and genomic information knowledgebase through integrative developments of Animal QTLdb and CorrDB. Nucleic Acids Research, gky1084 (Published early online, Nov., 8 2018).

Zhi-Liang Hu, Carissa A. Park and James M. Reecy (2016). Developmental progress and current status of the Animal QTLdb. Nucleic Acids Research, 44 (D1): D827-D833.

Zhi-Liang Hu, Carissa A. Park, Xiao-Lin Wu and James M. Reecy (2013). Animal QTLdb: an improved database tool for livestock animal QTL/association data dissemination in the post-genome era. Nucleic Acids Research, 41 (D1): D871-D879

Zhi-Liang Hu, Eric Ryan Fritz and James M. Reecy (2007). AnimalQTLdb: a livestock QTL database tool set for positional QTL information mining and beyond. Nucleic Acids Research, 2007, 35 (Database issue):D604-D609..

Zhi-Liang Hu, Svetlana Dracheva, Wonhee Jang, Donna Maglott, John Bastiaansen, Max F. Rothschild and James M. Reecy (2005). A QTL Resource and Comparison Tool for Pigs: PigQTLDB. Mammalian Genome. (2005) Volume 16(10):792-800.

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Contact: NAGRP Bioinformatics Team