RDR6 — Brassica oleracea var. botrytis

Summary

BoRDR6 (BOLND125_C01P036230.1_BOLND125_V1) on cauliflower chromosome 1 encodes an RNA-dependent RNA polymerase (RdRP) with RNA-binding domains, placing it in the RDR6 family. The gene is associated with RNA-directed gene silencing pathways, including post-transcriptional gene silencing, trans-acting siRNA processing, and antiviral responses. It has been linked to vegetative phase change, shoot apical meristem maintenance, carpel and pistil development, and pollen recognition. Associations with vitamin A, vitamin E, chlorophyll, and wax biosynthesis, as well as heat acclimation and response to heat, connect it to both developmental and stress-related processes. The encoded protein localises to the cytoplasm, nucleus, endoplasmic reticulum, stress granules, and the RNA-dependent RNA polymerase complex. Traits linked to BoRDR6 include leaf morphology, chlorophyll and anthocyanin content, and viral disease response. Studies of related genes in other species further connect the family to leaf polarity, fertility, seed dormancy, and antiviral immunity.