HY3 (BOLND125_C05P058090.1_BOLND125_V1) — Brassica oleracea var. botrytis

Summary

BoHY3 (HY3, PHYB, OOP1) on cauliflower chromosome 5 encodes a protein with phytochrome A–E, PAS, GAF, and histidine kinase domains. The gene is associated with photoreceptor activity, tetrapyrrole binding, and protein–bilin linkage, as well as regulation of plant organ formation, detection of light, and positive regulation of the phytochrome signaling pathway. It has been linked to traits including grain yield, panicle number, flower diameter, leaf area, stem length, plant dry weight, chlorophyll ratio, light quality response, far-red light sensitivity, and vegetative vigor. Associations also extend to defense response, carbon assimilation, starch synthesis, and ABA sensitivity. Related genes in other species are linked to phytochrome-mediated light signaling, shade avoidance, photoperiod sensitivity, and stress tolerance.