Genomics of the origin and evolution of Citrus
- USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
- Inst. Valenciano de Investigaciones Agrarias (IVIA), Moncada, Valencia (Spain). Centro de Genómica
- Centro de Investigación Príncipe Felipe (CIPF), Valencia (Spain)
- Inst. National de la Recherche Agronomique (INRA), San Giuliano (France)
- Univ. of Florida, Lake Alfred, FL (United States). Inst. of Food and Agricultural Sciences (IFAS)
- AGAP Research Unit, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Petit-Bourg, Guadeloupe (France)
- Univ. of California, Riverside, CA (United States)
- Centro de Investigación Príncipe Felipe (CIPF), Valencia (Spain); Spanish National Inst. of Bioinformatics (ELIXIR-es) at CIPF, Valencia (Spain)
- USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States); Univ. of California, Berkeley, CA (United States); Okinawa Inst. of Science and Technology Graduate Univ., Onna, Okinawa (Japan)
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1543733
- Journal Information:
- Nature (London), Journal Name: Nature (London) Journal Issue: 7692 Vol. 554; ISSN 0028-0836
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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