A new evolutionary framework for the genus Citrus: Its origin, evolution and dispersal [W183]

Wu Guohong Albert, Terol Javier F., Ibáñez Victoria, López-García Antonio, Pérez-Román Estela, Borredá Carles, Carrasco Concha Domingo, Tadeo Francisco, Carbonell Jose, Alonso Roberto, Curk Franck, Du Dongliang, Ollitrault Patrick, Roose Mikeal L., Dopazo Joaquin, Gmitter Frederick G., Rokhsar Daniel S., Talon Manuel. 2018. A new evolutionary framework for the genus Citrus: Its origin, evolution and dispersal [W183]. In : Proceedings Plant and Animal Genome XXVI Conference. PAG. San Diego : PAG, Résumé, 1 p. Plant and Animal Genomes Conference. 26, San Diego, États-Unis, 13 Janvier 2018/17 Janvier 2018.

Résumé : We present first solid insights on the origin, evolution and dispersal of citrus and elucidate the genealogy of the most important wild and cultivated varieties. These findings draw a new evolutionary framework for these fruit crops, a scenario that challenges current taxonomic and phylogenetic thoughts and points towards a reformulation of the genus Citrus. Based on genomic, phylogenetic and biogeographical analyses of the genus Citrus we propose that the center of origin of citrus was the Southeast foothills of the Himalayas, in a region including the eastern area of Assam, northern Myanmar and western Yunnan. Our analyses suggest that the ancestral citrus species underwent a sudden speciation during late Miocene and that the new species dispersed from there to surrounding regions, coinciding with a drastic transition from wetter monsoonal conditions to a drier climate. The Australian citrus and Tachibana mandarin split later from mainland citrus during the early Pliocene and Pleistocene, respectively.

Classification Agris : F30 - Génétique et amélioration des plantes
F70 - Taxonomie végétale et phytogéographie

Auteurs et affiliations

• Wu Guohong Albert, DOE-JGI (USA)
• Terol Javier F., IVIA (ESP)
• Ibáñez Victoria, IVIA (ESP)
• López-García Antonio, IVIA (ESP)
• Pérez-Román Estela, IVIA (ESP)
• Borredá Carles, IVIA (ESP)
• Carrasco Concha Domingo, IVIA (ESP)
• Tadeo Francisco, IVIA (ESP)
• Carbonell Jose, CIPF (ESP)
• Alonso Roberto, CIPF (ESP)
• Curk Franck, INRA (FRA)
• Du Dongliang, University of Florida (USA)
• Ollitrault Patrick, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-9456-5517
• Roose Mikeal L., UC (USA)
• Dopazo Joaquin, CIPF (ESP)
• Gmitter Frederick G., University de Florida (USA)
• Rokhsar Daniel S., DOE-JGI (USA)
• Talon Manuel, IVIA (ESP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/587277/)

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