WheatQTLdb

WheatQTLdb provides a curated repository of quantitative trait loci (QTL) and marker–trait association data for hexaploid wheat to support genetic analysis and breeding.

Key Features:

• Data content and scale: Contains 11,552 individual QTLs, 107 epistatic QTLs, and 330 metaQTLs (as of May 2020).
• Study types: Consolidates QTLs and marker–trait associations derived from interval mapping and genome-wide association studies (GWAS).
• Trait classification: Covers morphological traits; nitrogen (N) and phosphorus (P) use efficiency; biofortification traits including iron (Fe), potassium (K), selenium (Se), and zinc (Zn); abiotic stress tolerance to drought, waterlogging, heat stress, pre-harvest sprouting, and salinity; biotic stress resistance to bacteria, fungi, nematodes, and insects; as well as quality, physiological, developmental, and yield-related traits.
• QTL entry metadata: Provides for each QTL entry the QTL name, associated trait, linked markers, parental genotypes, crosses or mapping populations, association mapping panels, and other relevant data.
• Advanced data types: Includes metaQTLs, epistatic QTLs, and candidate gene annotations where available.

Scientific Applications:

• Fine mapping: Use detailed QTL positions and linked markers to refine genomic intervals underlying traits.
• Cloning: Aid identification of candidate genes associated with QTLs to support gene cloning efforts.
• Marker-Assisted Selection (MAS): Provide linked markers for implementation of marker-assisted selection in wheat breeding programs.

Methodology:

Data were collected through a thorough literature search for QTLs and marker–trait associations, manually curated, and assembled into the database format.