AFB1 — Triticum aestivum

Summary

TRAESCS5A02G281100 (TaAFB1) on wheat chromosome 5A encodes an F-box and leucine-rich repeat-containing protein with auxin receptor activity, auxin binding, NEDD8 transferase activity, and multiple transporter activities including auxin influx and efflux. The gene is associated with leaf rust resistance in wheat. TaAFB1 is linked to auxin signalling pathways, including TIR1-IAA-AUX/IAA interaction and ubiquitination of AUX/IAA proteins, as well as regulation of seed size, reproductive structure development, and growth processes. It has been associated with traits such as seedling cotyledon size, molybdenum content, light quality response, leaf margin serration, adventitious root number, peduncle length, floral organ number, phototropism, herbicide sensitivity, seed yield, biomass yield, and vegetative growth time. The protein localises to the nuclear SCF complex and ubiquitin ligase complex. Studies of related genes in other species link the family to grain width, grain length, grain yield, leaf blast disease response, and root branching.