CYR1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0095780 (HvCYR1) on barley chromosome 2H encodes a protein containing SUZ12, VEFS-Box and EMF2-like domains, with annotated histone H3K27 trimethylase activity and chromatin binding. The gene is associated with photoperiodism, flowering time, vernalization response, and the regulation of long-day photoperiodism. It has been linked to yield traits, days to flowering, seed and endosperm development, inflorescence and floral organ morphology, leaf and plant morphology, and vegetative-to-reproductive phase transition. Additional associations include responses to cold, cytokinin, abscisic acid, ethylene, and aphids, as well as traits such as grain number, grain size, grain weight, seed germination, and cold tolerance. The product localizes to Polycomb repressive complexes and chromatin silencing complexes, consistent with its association with epigenetic programming during endosperm and reproductive development.