RT article T1 Changes in anthocyanin production during domestication of Citrus A1 Butelli, Eugenio A1 García-Lor, Andrés A1 Licciardello, Concetta A1 Las Casas, Giuseppina A1 Hill, Lionel A1 Reforgiato Recupero, Giuseppe A1 Keremane, Manjunath L A1 Ramadugu, Chandrika A1 Krueger, Robert A1 Xu, Qiang A1 Deng, Xiuxin A1 Fanciullino, Anne-Laure A1 Froelicher, Yann A1 Navarro, Luis A1 Martin, Cathie K1 MYB transcription factors K1 Phylogenetic analysis. K1 F30 Plant genetics and breeding K1 Anthocyanins K1 Citrus K1 Domestication K1 Hybridization AB Mandarin (Citrus reticulata), citron (Citrus medica), and pummelo (Citrus maxima) are important species of the genus Citrus and parents of the interspecific hybrids that constitute the most familiar commercial varieties of Citrus: sweet orange, sour orange, clementine, lemon, lime, and grapefruit. Citron produces anthocyanins in its young leaves and flowers, as do species in genera closely related to Citrus, but mandarins do not, and pummelo varieties that produce anthocyanins have not been reported. We investigated the activity of the Ruby gene, which encodes a MYB transcription factor controlling anthocyanin biosynthesis, in different accessions of a range of Citrus species and in domesticated cultivars. A white mutant of lemon lacks functional alleles of Ruby, demonstrating that Ruby plays an essential role in anthocyanin production in Citrus. Almost all the natural variation in pigmentation by anthocyanins in Citrus species can be explained by differences in activity of the Ruby gene, caused by point mutations and deletions and insertions of transposable elements. Comparison of the allelic constitution of Ruby in different species and cultivars also helps to clarify many of the taxonomic relationships in different species of Citrus, confirms the derivation of commercial varieties during domestication, elucidates the relationships within the subgenus Papeda, and allows a new genetic classification of mandarins. PB American Society of Plant Biologists (ASPB) SN 1532-2548 YR 2017 FD 2017 LK http://hdl.handle.net/20.500.11939/6686 UL http://hdl.handle.net/20.500.11939/6686 LA en NO Butelli, E., Garcia-Lor, A., Licciardello, C., Las Casas, G., Hill, L., Recupero, G. R., ... & Deng, X. (2017). Changes in anthocyanin production during domestication of Citrus. Plant Physiology, 173(4), 2225-2242. DS MINDS@UW RD Jan 20, 2021