Coexpression of YABBY1 and YABBY3 Genes in Lateral Organs of Tomato Species (Solanum, Section Lycopersicon).

The interspecific polymorphism and the expression patterns of the genes encoding the YABBY1 and YABBY3 transcription factors of cultivated tomato Solanum lycopersicum and wild species S. chmielewskii, S. peruvianum, and S. habrochaites are characterized. The possibility of an inverse relationship between the level of YABBY1 and YABBY3 genes coexpression and the size of leaves and flowers of the tomato species studied is shown. The phylogeny of the genes suggests an earlier emergence of YABBY1 compared to YABBY3 as well as the origin of these paralogs from a common ancestor before the divergence of dicotyledonous plants into Rosids and Asterids.