Genome-Wide Identification of R2R3-MYB Family Genes and Their Response to Stress in .

Background: genes comprise one of the largest and most important gene families in plants, and are involved in the regulation of plant growth and development as well as responses to abiotic stresses. However, the functions of genes in remains largely unknown.

Methods: Here, a comprehensive genome-wide analysis of genes was performed, in which phylogenic relationships, gene structures, motif composition, chromosomal locations, collinearity analysis, and -acting elements were investigated. Moreover, the expression patterns of selected genes were analyzed in various tissues and under different abiotic stresses.

Results: In total, 125 genes were identified in the genome, and were subdivided into 26 groups based on phylogenetic analysis. Most genes in the same subgroup showed similar exon/intron structure and motif composition. All the genes were mapped to 19 chromosomes with the co-linearity relationship. Reverse transcription-quantitative real-time PCR (RT-qPCR) results showed that 8 exhibited different expression patterns in different plant tissues, and were differentially expressed in response to abscisic acid, methyl jasmonate, low-temperature stress.

Conclusions: This work contributes to a comprehensive understanding of the gene family in , and provides candidate genes for future research on abiotic stress in this plant.