Database Commons
Database Commons

a catalog of worldwide biological databases

Database Profile

General information

Full name: Animal QTL database
Description: QTLdb is an improved database tool for livestock animal QTL/association data dissemination in the post-genome era. It collects all publicly available trait mapping data, i.e. QTL (phenotype/expression, eQTL), candidate gene and association data (GWAS), copy number variations (CNV), etc. mapped to livestock animal genomes, aimed to facilitate locating and comparing discoveries within and between species. Tools are continually developed to align these trait mapping data to genome features such as annotated genes.
Year founded: 2007
Last update: 2015-12-29
Version: v28
Real time : Checking...
Country/Region: United States

Contact information

University/Institution: Iowa State University
Address: 2255 Kildee Hall, Ames, IA 50011, USA
City: Ames
Province/State: IA
Country/Region: United States
Contact name (PI/Team): Zhi-Liang Hu
Contact email (PI/Helpdesk):


Building a livestock genetic and genomic information knowledgebase through integrative developments of Animal QTLdb and CorrDB. [PMID: 30407520]
Hu ZL, Park CA, Reecy JM.

Successful development of biological databases requires accommodation of the burgeoning amounts of data from high-throughput genomics pipelines. As the volume of curated data in Animal QTLdb ( increases exponentially, the resulting challenges must be met with rapid infrastructure development to effectively accommodate abundant data curation and make metadata analysis more powerful. The development of Animal QTLdb and CorrDB for the past 15 years has provided valuable tools for researchers to utilize a wealth of phenotype/genotype data to study the genetic architecture of livestock traits. We have focused our efforts on data curation, improved data quality maintenance, new tool developments, and database co-developments, in order to provide convenient platforms for users to query and analyze data. The database currently has 158 499 QTL/associations, 10 482 correlations and 1977 heritability data as a result of an average 32% data increase per year. In addition, we have made >14 functional improvements or new tool implementations since our last report. Our ultimate goals of database development are to provide infrastructure for data collection, curation, and annotation, and more importantly, to support innovated data structure for new types of data mining, data reanalysis, and networked genetic analysis that lead to the generation of new knowledge.

Nucleic Acids Res. 2019:47(D1) | 0 Citations (from Europe PMC, 2024-06-22)
Developmental progress and current status of the Animal QTLdb. [PMID: 26602686]
Hu ZL, Park CA, Reecy JM.

The Animal QTL Database (QTLdb; has undergone dramatic growth in recent years in terms of new data curated, data downloads and new functions and tools. We have focused our development efforts to cope with challenges arising from rapid growth of newly published data and end users' data demands, and to optimize data retrieval and analysis to facilitate users' research. Evidenced by the 27 releases in the past 11 years, the growth of the QTLdb has been phenomenal. Here we report our recent progress which is highlighted by addition of one new species, four new data types, four new user tools, a new API tool set, numerous new functions and capabilities added to the curator tool set, expansion of our data alliance partners and more than 20 other improvements. In this paper we present a summary of our progress to date and an outlook regarding future directions. © The Author(s) 2015. Published by Oxford University Press on behalf of Nucleic Acids Research.

Nucleic Acids Res. 2016:44(D1) | 135 Citations (from Europe PMC, 2024-06-22)
Animal QTLdb: an improved database tool for livestock animal QTL/association data dissemination in the post-genome era. [PMID: 23180796]
Hu ZL, Park CA, Wu XL, Reecy JM.

The Animal QTL database (QTLdb; is designed to house all publicly available QTL and single-nucleotide polymorphism/gene association data on livestock animal species. An earlier version was published in the Nucleic Acids Research Database issue in 2007. Since then, we have continued our efforts to develop new and improved database tools to allow more data types, parameters and functions. Our efforts have transformed the Animal QTLdb into a tool that actively serves the research community as a quality data repository and more importantly, a provider of easily accessible tools and functions to disseminate QTL and gene association information. The QTLdb has been heavily used by the livestock genomics community since its first public release in 2004. To date, there are 5920 cattle, 3442 chicken, 7451 pigs, 753 sheep and 88 rainbow trout data points in the database, and at least 290 publications that cite use of the database. The rapid advancement in genomic studies of cattle, chicken, pigs, sheep and other livestock animals has presented us with challenges, as well as opportunities for the QTLdb to meet the evolving needs of the research community. Here, we report our progress over the recent years and highlight new functions and services available to the general public.

Nucleic Acids Res. 2013:41(Database issue) | 223 Citations (from Europe PMC, 2024-06-22)
AnimalQTLdb: a livestock QTL database tool set for positional QTL information mining and beyond. [PMID: 17135205]
Hu ZL, Fritz ER, Reecy JM.

The Animal Quantitative Trait Loci (QTL) database (AnimalQTLdb) is designed to house all publicly available QTL data on livestock animal species from which researchers can easily locate and compare QTL within species. The database tools are also added to link the QTL data to other types of genomic information, such as radiation hybrid (RH) maps, finger printed contig (FPC) physical maps, linkage maps and comparative maps to the human genome, etc. Currently, this database contains data on 1287 pig, 630 cattle and 657 chicken QTL, which are dynamically linked to respective RH, FPC and human comparative maps. We plan to apply the tool to other animal species, and add more structural genome information for alignment, in an attempt to aid comparative structural genome studies (

Nucleic Acids Res. 2007:35(Database issue) | 117 Citations (from Europe PMC, 2024-06-22)


All databases:
315/6000 (94.767%)
Genotype phenotype and variation:
42/852 (95.188%)
Total Rank

Community reviews

Not Rated
Data quality & quantity:
Content organization & presentation
System accessibility & reliability:

Word cloud

Related Databases

Cited by

Record metadata

Created on: 2015-06-20
Curated by:
Lina Ma [2018-06-11]
Lin Xia [2016-03-28]
Lin Liu [2016-01-29]
Lin Liu [2016-01-12]
Lin Liu [2016-01-03]
Lin Liu [2016-01-02]
Lin Xia [2015-11-20]
Mengwei Li [2015-06-26]