| Summary: | Glycosylation mediated by Family-1 UDP-glycosyltransferases (UGTs) plays crucial roles in plant growth and adaptation to various stress conditions. <i>Prunus mume</i> is an ideal crop for analyzing flowering for its early spring flowering characteristics. Revealing the genomic and transcriptomic portfolio of the UGT family in <i>P. mume</i>, a species in which <i>UGTs</i> have not yet been investigated, is therefore important. In this study, 130 putative <i>UGT</i> genes were identified and phylogenetically clustered into 14 groups. These <i>PmUGTs</i> were distributed unevenly across eight chromosomes and 32 tandem duplication and 8 segmental duplication pairs were revealed. A highly conserved intron insertion event was revealed on the basis of intron/exon patterns within <i>PmUGTs</i>. According to RNA-seq data, these <i>PmUGTs</i> were specifically expressed in different tissues and during the bud dormancy process. In addition, we confirmed the differential expression of some representative genes in response to abscisic acid treatment. Our results will provide important information on the UGT family in <i>P. mume</i> that should aid further characterization of their biological roles in response to environmental stress.
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