AFB1 — Triticum turgidum subsp. durum

Summary

TRITD1BV1G048330 (AFB1) on durum wheat chromosome 1B encodes a protein with auxin receptor activity, auxin binding, NEDD8 transferase activity, and multiple transporter activities including auxin influx and efflux, ABC-type indole transport, and cadmium ion transport. It contains F-box and leucine-rich repeat domains characteristic of the COI1/TIR1 family. In durum wheat, AFB1 is associated with leaf rust resistance. The gene is linked to auxin signalling, SCF complex assembly, regulation of lateral root development, and responses to nitrate, cyclopentenone, and oomycete molecules. It localizes to the nuclear SCF complex and ubiquitin ligase complex. Associations include seed yield, biomass, vegetative growth time, herbicide sensitivity, root hair length, flower development, and pollen fertility. Studies of related genes in other species connect the family to grain size, grain weight, grain yield, leaf blast disease response, and drought tolerance.