HY8 (BOLND125_C05P008060.1_BOLND125_V1) — Brassica oleracea var. botrytis

Summary

BoHY8 (HY8), located on chromosome 5 of cauliflower (Brassica oleracea var. botrytis), encodes a protein with phytochrome domains, including GAF, PAS, and histidine kinase domains. The gene is associated with photoreceptor activity, tetrapyrrole binding, and detection of light, as well as regulation of response to red or far red light and positive regulation of the phytochrome signaling pathway. BoHY8 has been linked to numerous agronomically relevant traits, including grain yield, flower diameter, leaf area, plant growth hormone response, photoperiod sensitivity, far red light sensitivity, and vegetative vigor. It is also associated with heat stress tolerance, anthocyanin accumulation, and responses to pathogens such as Fusarium graminearum. Studies of related genes in other species link the family to phytochrome-mediated light signaling, shade-induced hypocotyl elongation, and floral initiation.