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Oxford University Press (OUP) Horticulture Research 12(11)
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    초록·키워드

    UDP-dependent glycosyltransferases (UGTs) play a critical role in producing glycosylated metabolites that mediate plant-environment interactions. Recent studies have examined the role of <i>UGT</i> genes across various plant genomes. However, the evolutionary history and functional divergence of the <i>UGT</i> pan-gene family in the genus <i>Solanum</i> have not yet been explored. This study integrated data from 61 tomatoes and 9 representative genomes, ranging from algae to angiosperms, to identify 12 073 genes. The phylogeny of the UGT gene family reveals a clear evolutionary trajectory from unicellular algae to ferns, mosses, gymnosperms, and angiosperms. The study identified a significant number of tomato-specific <i>UGT</i> genes and explored the expansions of <i>UGT73</i> and <i>UGT85</i> subfamilies. The entire <i>UGT</i> genes (10 769) in tomato were classified into 118 orthologous gene groups, including 58 core, 31 softcore, 10 dispensable, 19 private orthologous gene groups, and the core groups contained 7811 genes, representing 72.53% of the total <i>UGT</i> genes. Analysis of gene family expansion revealed that whole-genome triplication and tandem duplication events play significant roles in the expansion of the <i>UGT</i> gene family. Selection pressure analysis revealed that the <i>UGT</i> genes experienced purifying selection in the genus <i>Solanum</i>. Additionally, expression profiles of some <i>UGT</i> genes in different tissues demonstrated expression divergence of multicopy genes across different <i>UGT</i> subfamilies due to the increase in gene dosage. Subcellular localization prediction revealed that most genes are localized in the chloroplast. These findings provide critical insights into the evolution and function of the <i>UGT</i> genes in tomato, laying a foundation for further exploration in adaptive evolution.

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