FC1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.4HG0336720 (FC1, also known as INT-C or TB1) on barley chromosome 4H encodes a TCP transcription factor containing a CYC/TB1_R domain, with sequence-specific DNA binding activity. The protein localises to the nucleus and is associated with the regulation of shoot development, inflorescence and flower development, specification of symmetry, and determination of dorsoventral asymmetry. It has been connected to strigolactone-mediated axillary bud dormancy and suppression of tillering, as well as shoot gravitropism. Associations include grain size, spikelet morphology, fruit size and position, kernel shape and size, plant height, tiller and crown root development, and domestication and breeding traits. Studies of related genes in other species link the family to tillering, branching, inflorescence development, stem internode elongation, grain yield, and responses to auxin and strigolactone.