HY3 (PGSC0003DMG400015766) — Solanum tuberosum

Summary

PGSC0003DMG400015766 (HY3/PHYA) on potato chromosome 10 encodes a phytochrome A–E family photoreceptor with tetrapyrrole binding, and domains including PAS, GAF, and PHY. The gene is associated with regulation of response to red or far-red light, positive regulation of the phytochrome signaling pathway, entry into dormancy, and protein–bilin linkage. It is linked to tuber morphology and size, axillary bud dormancy, photoperiod sensitivity, far-red light sensitivity, chlorophyll ratio, plant growth hormone response, grain yield, vegetative vigor, plant dry weight, leaf area, and root system morphology. Associations also include shoot regeneration, tuber formation, anthocyanin synthesis, cold and drought stress responses, disease resistance, and carbon assimilation. Studies of related genes in other species link the family to tuberization, fruit ripening, lycopene accumulation, senescence, freezing stress tolerance, and thermotolerance.