HB-2 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0184740 (symbol Vrs1, also known as HB-2) encodes a homeodomain-leucine zipper (HD-Zip) class I transcription factor with DNA-binding, transcription factor activity, and protein homodimerization functions. The gene is associated with regulation of gibberellin biosynthetic process, chlorophyll breakdown, leaf senescence, meristem determinacy, inflorescence development, seed maturation, and responses to auxin and abscisic acid. It localises to the nucleus. Vrs1 is linked to spike type, grain number, grain weight, grain size, grain yield, heading time, plant height, tiller number, ear number, spikelet fertility, seed dormancy, seed longevity, leaf width, leaf senescence, root length, root number, root thickness, stand establishment, harvest index, transpiration rate, and osmotic response sensitivity. Related genes in other species are linked to inflorescence branching, spike density, panicle length, and cold tolerance.