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Population genomics of apricots unravels domestication history and adaptive events

Alexis Groppi 1 Shuo Liu 2 A. Cornille 3 David Tricon 2 Quynh Trang Bui 2 Corinne Cruaud 4 Sandrine Arribat 5 Caroline Belser 4 William Marande 5 Jérôme Salse 6 Cécile Huneau 6 Nathalie Rodde 5 Wassim Rhalloussi 5 Stéphane Cauet 5 Benjamin Istace 4 Erwan Denis 4 Sébastien Carrère 7 Jean-Marc Audergon 8 Guillaume Roch 8 Patrick Lambert 8 Tetyana Zhebentyayeva 9 Wei-Sheng Liu 10 Olivier Bouchez 11 Céline Lopez-Roques 11 Rémy-Félix Serre 11 Robert Debuchy 12 Joseph Tran 13 Patrick Wincker 4 Xilong Chen 3 Pierre Pétriacq 2 Aurélien Barré 1 Macha Nikolski 1 Jean-Marc Aury 4 Albert Abbott 14 Tatiana Giraud 15, * Véronique Decroocq 2, *
Abstract : Among crop fruit trees, the apricot (Prunus armeniaca) provides an excellent model to study divergence and adaptation processes. Here, we obtain nearly 600 Armeniaca apricot genomes and four high-quality assemblies anchored on genetic maps. Chinese and European apricots form two differentiated gene pools with high genetic diversity, resulting from independent domestication events from distinct wild Central Asian populations, and with subsequent gene flow. A relatively low proportion of the genome is affected by selection. Different genomic regions show footprints of selection in European and Chinese cultivated apricots, despite convergent phenotypic traits, with predicted functions in both groups involved in the perennial life cycle, fruit quality and disease resistance. Selection footprints appear more abundant in European apricots, with a hotspot on chromosome 4, while admixture is more pervasive in Chinese cultivated apricots. Our study provides clues to the biology of selected traits and targets for fruit tree research and breeding.
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Submitted on : Friday, July 9, 2021 - 11:26:14 AM
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Alexis Groppi, Shuo Liu, A. Cornille, David Tricon, Quynh Trang Bui, et al.. Population genomics of apricots unravels domestication history and adaptive events. Nature Communications, Nature Publishing Group, 2021, 12 (1), pp.3956. ⟨10.1038/s41467-021-24283-6⟩. ⟨hal-03282504⟩

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