Genome-wide identification and expression analysis of the B-box genes during blue light treatment in mango (Mangifera indica L.)

B-box (BBX) proteins are zinc-finger transcription factors with one or two BBX domains and sometimes a CCT domain. These proteins play an essential role in the regulation of plant physiological processes. However, little information is known regarding the BBX genes in the mango. In this study, a total of 33 mango BBX genes were identified and named MiBBX1 to MiBBX33. Phylogenetic results showed that the 33 MiBBXs could be divided into five groups (I, II, III, IV, V), with high similarity in exon-intron structures and BBX domain and motif compositions within the same group and subgroup. Different members of the mango BBX family showed different expression patterns during blue light treatment. This study provides comprehensive genetic information on the MiBBXs in mango fruit.