[Identification of banana gene family members and their expression profiles under biotic and abiotic stresses].

The Spt-Ada-Gcn5-acetyltransferase (SAGA) is an ancillary transcription initiation complex which is highly conserved. The ADA1 (alteration/deficiency in activation 1, also called histone H2A functional interactor 1, HFI1) is a subunit in the core module of the SAGA protein complex. ADA1 plays an important role in plant growth and development as well as stress resistance. In this paper, we performed genome-wide identification of banana gene family members based on banana genomic data, and analyzed the basic physicochemical properties, evolutionary relationships, selection pressure, promoter -acting elements, and its expression profiles under biotic and abiotic stresses. The results showed that there were 10, 6, and 7 family members in , and . The members were all unstable and hydrophilic proteins, and only contained the conservative SAGA-Tad1 domain. Both MaADA1 and MbADA1 have interactive relationship with Sgf11 (SAGA-associated factor 11) of core module in SAGA. Phylogenetic analysis revealed that banana gene family members could be divided into 3 classes. The evolution of gene family members was mostly influenced by purifying selection. There were large differences among the gene structure of banana gene family members. gene family members contained plenty of hormonal elements. may play a prominent role in the resistance of banana to cold stress, while may respond to the Panama disease of banana. In conclusion, this study suggested gene family members are highly conserved in banana, and may respond to biotic and abiotic stress.