Background: As a main staple food, rice is also a model plant for functional genomic studies of monocots. Decoding of every DNA element of the rice genome is essential for genetic improvement to address increasing food demands. The past 15 years have witnessed extraordinary advances in rice functional genomics. Systematic characterization and proper deposition of every rice gene are vital for both functional studies and crop genetic improvement.
Findings: We built a comprehensive and accurate dataset of ?2,800 functionally characterized rice genes and ?5,000 members of different gene families, by integrating data from available databases and reviewing of every publication on rice functional genomic studies. The dataset accounts for 19.2% of the 39,045 annotated protein-coding rice genes, which provides the most exhaustive archive for investigating the functions of rice genes. We also constructed 214 gene interaction networks based on 1,841 connections between 1,310 genes. The largest network with 762 genes indicated that pleiotropic genes linked different biological pathways. Increasing degree of conservation of the flowering pathway was observed among more closely related plants, implying substantial value of rice genes for future dissection of flowering regulation in other crops. All data are deposited in the funRiceGenes database ( https://funricegenes.github.io/ ). Functionality for advanced search and continuous updating of the database are provided by a Shiny application ( http://funricegenes.ncpgr.cn/ ).
Conclusions: The funRiceGenes dataset would enable further exploring of the crosslink between gene functions and natural variations in rice, which can also facilitate breeding design to improve target agronomic traits of rice.
