Identification and Expression Analysis of the <Emphasis Type="Italic">YABBY1</Emphasis> Gene in Wild Tomato Species

The YABBY1 genes were identified in one cultivated and ten wild tomato species of the Lycopersicon section of the Solanum genus. The structural analysis of genes and encoded proteins was carried out, and the YABBY1 interspecies functional conservation in tomato was proposed. It was shown that the YABBY1 gene sequence can be used for phylogenetic dividing of tomatoes into self- and cross-pollinated species, as well as green- and red-fruited species. The significant YABBY1 expression level was detected in S. peruvianum fruits, indicating the possibility of abaxial properties preservation in the fruit skin. The obtained data confirmed the conservation of the YABBY1-mediated organ polarity control during the process of the evolutionary diversification and domestication of tomato species.