From the origin of agriculture to the present, cultivated barley (Hordeum vulgare ssp. vulgare) has been the most important temperate crop, ranking fourth among cereals in terms of both area cultivated and tonnage harvested.
Reference genome: Morex V2 Morex V3
As the direct ancestor of cultivated barley, wild barley (Hordeum vulgare ssp. spontaneum) is a valuable genetic resource for ecology, feeding and improving resistance to biotic and abiotic stresses and productivity.
Reference genome: B1K-04-12
Tibetan hulless barley (Hordeum vulgare var. nudum), a self-reproducing annual species grown at high altitudes, has been a staple crop for Tibetans and remains an important economic crop in the Tibetan Plateau.
Reference genome: Zangqing320
If use BarleyExpDB in publication, please cite: Li TT, Li YH, Shangguan HB, Bian JX, Luo RH, Tian Y, Li ZM, Nie XJ, Cui LC. BarleyExpDB: an integrative gene expression database for barley. BMC Plant Biol. 2023 Mar 31;23(1):170. doi: 10.1186/s12870-023-04193-z.     
If you use the reference genome of cultivated barley Morex V2, please cite: Monat C, Padmarasu S, Lux T, Wicker T, Gundlach H, Himmelbach A, Ens J, Li C, Muehlbauer GJ, Schulman AH, Waugh R, Braumann I, Pozniak C, Scholz U, Mayer KFX, Spannagl M, Stein N, Mascher M. TRITEX: chromosome-scale sequence assembly of Triticeae genomes with open-source tools. Genome Biol. 2019 Dec 18;20(1):284. doi: 10.1186/s13059-019-1899-5. PMID: 31849336; PMCID: PMC6918601.     
If you use the reference genome of cultivated barley Morex V3, please cite: Mascher M, Wicker T, Jenkins J, Plott C, Lux T, Koh CS, Ens J, Gundlach H, Boston LB, Tulpová Z, Holden S, Hernández-Pinzón I, Scholz U, Mayer KFX, Spannagl M, Pozniak CJ, Sharpe AG, Šimková H, Moscou MJ, Grimwood J, Schmutz J, Stein N. Long-read sequence assembly: a technical evaluation in barley. Plant Cell. 2021 Jul 19;33(6):1888-1906. doi: 10.1093/plcell/koab077. PMID: 33710295; PMCID: PMC8290290.     
If you use the reference genome of wild barley B1K-04-12, please cite: Jayakodi M, Padmarasu S, Haberer G, Bonthala VS, Gundlach H, Monat C, Lux T, Kamal N, Lang D, Himmelbach A, Ens J, Zhang XQ, Angessa TT, Zhou G, Tan C, Hill C, Wang P, Schreiber M, Boston LB, Plott C, Jenkins J, Guo Y, Fiebig A, Budak H, Xu D, Zhang J, Wang C, Grimwood J, Schmutz J, Guo G, Zhang G, Mochida K, Hirayama T, Sato K, Chalmers KJ, Langridge P, Waugh R, Pozniak CJ, Scholz U, Mayer KFX, Spannagl M, Li C, Mascher M, Stein N. The barley pan-genome reveals the hidden legacy of mutation breeding. Nature. 2020 Dec;588(7837):284-289. doi: 10.1038/s41586-020-2947-8. Epub 2020 Nov 25. PMID: 33239781; PMCID: PMC7759462.     
If you use the reference genome of Tibetan hulless barley Zangqing320, please cite: Dai F, Wang X, Zhang XQ, Chen Z, Nevo E, Jin G, Wu D, Li C, Zhang G. Assembly and analysis of a qingke reference genome demonstrate its close genetic relation to modern cultivated barley. Plant Biotechnol J. 2018 Mar;16(3):760-770. doi: 10.1111/pbi.12826. Epub 2017 Oct 5. PMID: 28871634; PMCID: PMC5814578.