MetaCrop is a manually curated repository of high quality information concerning the …

• Abstract
• Introduction
• Database description
• Curation, quality assurance, completeness and continuation
• Application of the metacrop database
• Discussion
• Conclusion
• Acknowledgment
• References
• Table 1
• Figure

This work was partly supported by the German Federal Ministryof Education and Research (grant 0312706A). Funding to pay theOpen Access publication charges for this article was providedby the Leibniz Institute of Plant Genetics and Crop Plant Research(IPK) Gatersleben.Conflict of interest statement. None declared.