FC1 — Sorghum bicolor

Summary

SbFC1 (SORBI_3001G121600) on sorghum chromosome 1 encodes a Teosinte branched 1 protein with a CYC/TB1_R domain and a TCP transcription factor domain, acting as a sequence-specific DNA-binding transcription factor. It is associated with regulation of shoot development, secondary shoot formation, flower development, cell division, and specification of symmetry, and localises to the nucleus. The gene is linked to strigolactone-mediated axillary bud dormancy and tillering suppression, as well as shoot gravitropism and abiotic stress responses. Associations include grain number, grain yield, seed size, spikelet fertility, tiller and crown root development, plant height, and domestication. Studies of related genes in other species connect the family to tillering, branching, inflorescence architecture, auxin and strigolactone signalling, and grain and yield traits.