CYR1 — Triticum aestivum

Summary

TRAESCS2A02G000100 (TaCYR1, also known as TaVRN2-2A) on wheat chromosome 2A encodes a Polycomb-group protein containing Znf_SUZ12, EMF2-like and VEFS-Box domains, with annotated GTP cyclohydrolase II and histone H3K27 trimethylase activities. The gene is associated with chromatin binding, transcription corepressor binding, and DNA-binding transcription factor activity. It is linked to the regulation of flowering time, photoperiodism, vernalization response, and the vegetative-to-reproductive phase transition. Associations also include seed and endosperm development, embryo development, shoot morphogenesis, and epigenetic programming in the endosperm. TaCYR1 has been connected to yield traits, leaf and inflorescence morphology, auxin and cytokinin content and sensitivity, and hypoxia tolerance. Studies of related genes in other species link the gene family to floral organ development, meristem identity, and autonomous endosperm development.