Inside the CBF locus in Poaceae

▶ CBFs and their regulon are major determinants of low-temperature tolerance. ▶ In grass genomes CBFs are structured in clusters of tandemly duplicated genes. ▶ Differential expansion of the CBF clusters exists among and within Poaceae species. ▶ CNVs may contribute to phenotypic diversity in temperate Poaceae. ▶ Different mechanisms could play an important role in chilling resistance in tropical Poaceae.