A chromosome-scale assembly reveals chromosomal aberrations and exchanges generating genetic diversity in Coffea arabica germplasm
Scalabrin, Simone | Magris, Gabriele | Liva, Mario | Vitulo, Nicola | Vidotto, Michele | Scaglione, Davide | del Terra, Lorenzo | Ruosi, Manuela, Rosanna | Navarini, Luciano | Pellegrino, Gloria | Berny Mier y Teran, Jorge, Carlos | Toniutti, Lucile | Suggi Liverani, Furio | Cerutti, Mario | Di Gaspero, Gabriele | Morgante, Michele | IGA Technology Services Srl (IGATech) | Institute of Applied Genomics [Udine] (IGA) ; Institute of Applied Genomics | Università degli Studi di Udine - University of Udine [Italie] | Università degli studi di Verona = University of Verona (UNIVR) | illycaffé S.p.A | Lavazza Group | World Coffee Research (WCR) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | Département Systèmes Biologiques (Cirad-BIOS) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Istituto di Genomica Applicata (IGA) | illycaffè SpA, Lavazza Group and Istituto di Genomica Applicata
International audience
Показать больше [+] Меньше [-]Английский. In order to better understand the mechanisms generating genetic diversity in the recent allotetraploid species Coffea arabica, here we present a chromosome-level assembly obtained with long read technology. Two genomic compartments with different structural and functional properties are identified in the two homoeologous genomes. The resequencing data from a large set of accessions reveals low intraspecific diversity in the center of origin of the species. Across a limited number of genomic regions, diversity increases in some cultivated genotypes to levels similar to those observed within one of the progenitor species, Coffea canephora, presumably as a consequence of introgressions deriving from the so-called Timor hybrid. It also reveals that, in addition to few, early-occurring exchanges between homoeologous chromosomes, there are numerous recent chromosomal aberrations including aneuploidies, deletions, duplications and exchanges. These events are still polymorphic in the germplasm and could represent a fundamental source of genetic variation in such a lowly variable species.
Показать больше [+] Меньше [-]Библиографическая информация
Эту запись предоставил Institut national de la recherche agronomique