HY8 (GLYMA_20G090000V4) — Glycine max

Summary

GmHY8 (GLYMA_20G090000V4) on soybean chromosome 20 encodes a phytochrome A-E family photoreceptor with domains including PAS, GAF, and histidine kinase, and is annotated with photoreceptor activity, tetrapyrrole binding, and DNA-binding transcription activator activity. The gene is associated with light quality and far-red light sensitivity responses, photoperiod sensitivity, and the vegetative to reproductive phase transition. It is linked to grain yield, seed set percent, leaf area, leaf angle, branch angle, vegetative vigor, and plant growth hormone response. Associations also include seedling cotyledon size, inflorescence length, flower diameter, fruit set, phenolic compound content, and glyphosate sensitivity. The gene is associated with phytochrome-mediated photoresponses, phytochrome A nuclear accumulation and import, and heat stress tolerance. Related genes in other species link the family to far-red light signaling and phytochrome A nuclear import.