BTC1 — Beta vulgaris subsp. vulgaris

Summary

BTC1 (BVRB_2G045920) in sugar beet (Beta vulgaris subsp. vulgaris) encodes a phosphorelay response regulator with DNA-binding transcription factor activity, protein kinase activity, and a CCT domain characteristic of ARR-like proteins. This nuclear-localized gene is associated with regulation of vernalization response, circadian rhythm, photomorphogenesis, and flowering time, particularly through downregulation of long-day photoperiodism. BTC1 is linked to numerous agronomically important traits including photoperiod-sensitive flowering time, bolting tolerance, vegetative vigor, leaf morphology, root development, seed shape, and responses to red light, temperature stress, and hormones such as abscisic acid, ethylene, and gibberellin. Studies of related genes in other species connect the family to circadian regulation, root development, and ethylene production.