RT article T1 Genomics of the origin and evolution of Citrus A1 Wu, Guohong Albert A1 Terol, Javier A1 Ibanez, Victoria A1 López-García, Antonio A1 Pérez-Román, Estela A1 Borredá, Carles A1 Domingo, Concha A1 Tadeo, Francisco R. A1 Carbonell-Caballero, Jose A1 Alonso, Roberto A1 Curk, Franck A1 Du, Dongliang A1 Ollitrault, Patrick A1 Roose, Mikeal L. A1 Dopazo, Joaquín A1 Gmitter Jr., Frederick G. A1 Rokhsar, Daniel S. A1 Talón, Manuel K1 F30 Plant genetics and breeding K1 genomics K1 Citrus AB The genus Citrus, comprising some of the most widely cultivated fruit crops worldwide, includes an uncertain number of species. Here we describe ten natural citrus species, using genomic, phylogenetic and biogeographic analyses of 60 accessions representing diverse citrus germ plasms, and propose that citrus diversified during the late Miocene epoch through a rapid southeast Asian radiation that correlates with a marked weakening of the monsoons. A second radiation enabled by migration across the Wallace line gave rise to the Australian limes in the early Pliocene epoch. Further identification and analyses of hybrids and admixed genomes provides insights into the genealogy of major commercial cultivars of citrus. Among mandarins and sweet orange, we find an extensive network of relatedness that illuminates the domestication of these groups. Widespread pummelo admixture among these mandarins and its correlation with fruit size and acidity suggests a plausible role of pummelo introgression in the selection of palatable mandarins. This work provides a new evolutionary framework for the genus Citrus. PB Springer Nature SN 1476-4687 YR 2018 FD 2018 LK http://hdl.handle.net/20.500.11939/5741 UL http://hdl.handle.net/20.500.11939/5741 LA en_US NO Wu, G. A., Terol, J., Ibanez, V., Lopez-Garcia, A., Perez-Roman, E., Borreda, C. et al. (2018). Genomics of the origin and evolution of Citrus. Nature, 554, 311–316. DS MINDS@UW RD May 18, 2022