TY - JOUR T1 - Genomics of the origin and evolution of Citrus. JF - Nature Y1 - 2018 A1 - Wu, Guohong Albert A1 - Terol, Javier A1 - Ibañez, Victoria A1 - López-García, Antonio A1 - Pérez-Román, Estela A1 - Borredá, Carles A1 - Domingo, Concha A1 - Tadeo, Francisco R A1 - Carbonell-Caballero, José A1 - Alonso, Roberto A1 - Curk, Franck A1 - Du, Dongliang A1 - Ollitrault, Patrick A1 - Roose, Mikeal L A1 - Dopazo, Joaquin A1 - Gmitter, Frederick G A1 - Rokhsar, Daniel S A1 - Talon, Manuel KW - Asia, Southeastern KW - Biodiversity KW - citrus KW - Crop Production KW - Evolution, Molecular KW - Genetic Speciation KW - Genome, Plant KW - Genomics KW - Haplotypes KW - Heterozygote KW - History, Ancient KW - Human Migration KW - Hybridization, Genetic KW - Phylogeny 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.

VL - 554 IS - 7692 U1 - https://www.ncbi.nlm.nih.gov/pubmed/29414943?dopt=Abstract ER -