VRN1 — Triticum aestivum

Summary

TRAESCS4A02G241900 (VRN1, TaVRN1) on bread wheat chromosome 4A encodes a B3 DNA-binding domain protein of the REM16-like family, localised to the nucleus. The gene is associated with flowering time, photoperiodism, photoprotection, and the transition from vegetative to reproductive phase. It has been linked to numerous agronomic traits including grain weight, grain yield, ear number, tiller number, plant height, days to heading, anthesis time, drought tolerance, heat tolerance, stripe rust, heterosis, root volume, root number, and grain texture. Additional associations include cellular response to drought, jasmonic acid anabolism, chlorophyll metabolism, floral organ formation, anther dehiscence, pollen sperm cell differentiation, and megagametogenesis. Studies of related genes in other species link the family to plant architecture.