HY3 (DCAR_026982) — Daucus carota subsp. sativus

Summary

DcHY3 (DCAR_026982) on carrot chromosome 8 encodes a phytochrome family member, a photoreceptor protein with domains including PAS, GAF, and histidine kinase, and is annotated with tetrapyrrole binding activity. The gene is associated with regulation of response to red or far red light, detection of light, and positive regulation of the phytochrome signaling pathway. It is linked to numerous agronomic traits including photoperiod sensitivity, far red light sensitivity, blue light sensitivity, grain yield, flower diameter, inflorescence length, branch angle, leaf area, vegetative vigor, plant dry weight, root system morphology, fruit set, and phenolic compound content. Associations also include responses to drought, cold, heat shock, and disease, as well as processes such as delayed flowering, tuber size, chlorophyll accumulation, anthocyanin synthesis, and nitrogen and phosphorus utilization. Studies of related genes in other species connect the family to tuberization, fruit ripening, carotenoid accumulation, and salinity tolerance.