Abstract
Gene duplication followed by subfunctionalization and neofunctionalization is of a great evolutionary importance. In plant genomes, duplicated genes may result from either polyploidization (homoeologous genes) or segmental chromosome duplications (paralogous genes). The flavonoid biosynthesis (FB) gene network is known to be a convenient model system for investigation of different issues of plant genetics. In the current study, homoeologous and/or paralogous copies were isolated for a number of FB regulatory and structural genes in polyploid wheat. Duplicated copies of the regulatory Myc gene demonstrated essential structural divergence and tissue-specific transcriptional activity. Among structural genes both similar or divergent homoeological sets were found. Chi homoeologs encode identical enzymes, but have distinct sets of cis-regulatory elements and demonstrate different patterns of expression. Unlike Chi, the F3h homoeologs are similar in both coding and promoter regions. However, there is a highly divergent paralog , F3h-2, in the B, G, S and R genomes of Triticeae species, which has been suggested to acquire a new functional specialization.
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Khlestkina, E., Shoeva, O. (2016). Organization and Evolution of the Duplicated Flavonoid Biosynthesis Genes in Triticeae. In: Korogodina, V., Mothersill, C., Inge-Vechtomov, S., Seymour, C. (eds) Genetics, Evolution and Radiation. Springer, Cham. https://doi.org/10.1007/978-3-319-48838-7_10
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DOI: https://doi.org/10.1007/978-3-319-48838-7_10
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