Genome-Wide Identification and Expression Profiling of B3 Transcription Factor Genes in Prunus armeniaca

The B3 superfamily, which belongs to the plant-specific transcription factors, is widely involved in multiple biological processes. In apricot (Prunus armeniaca), classification, structure, and function of superfamily are not yet clear. this study, a total 75 genes were identified from genome. can be divided into five subfamilies, i.e., REM, ARF, ABI3, RAV, HSI, same subfamily have similar structures. distribution on chromosomes presents clustering phenomenon. Tandem duplication main mode family expansion, gene mainly occurs REM ARF subfamilies. Many originated common ancestor Arabidopsis before lineage divergence, expanded fewer times than Arabidopsis. Gene ontology analysis showed that closely related vernalization, flower development, shoot system development. PaABI3-1 PaABI3-2 might play positive regulation role PaOleosin, encodes lipid body protein. This study lays foundation for further apricot, especially specific functions ABI3 kernel oil storage.