PRR3 — Triticum turgidum subsp. durum

Summary

TRITD2AV1G019250 (symbol PRR3, also known as PPD-A1) on durum wheat chromosome 2A encodes a response regulatory domain-containing protein with ARR-like, CCT domain, CheY-like superfamily, and Sig_transdc_resp-reg_receiver domains, and annotated molecular functions including phosphorelay response regulator activity, sequence-specific DNA binding, and red/far-red light photoreceptor activity. The gene is associated with photoperiod-sensitive flowering time, heading date, grain number per plant, harvest index, and spikelets per spike. It is linked to circadian rhythm regulation, rhythmic processes, temperature compensation of the circadian clock, photomorphogenesis, anthocyanin metabolism, and responses to drought stress, including flowering under drought and drought escape pathways. Additional associations include grain yield, leaf area, photosynthetic ability, salt tolerance, cold stress tolerance, and aphid response. Related genes in other species are linked to photoperiod-dependent flowering, light signaling, freezing tolerance, and biomass.