Please use this identifier to cite or link to this item: http://hdl.handle.net/2067/47490
Title: European traditional tomatoes galore: a result of farmers' selection of a few diversity-rich loci
Authors: Blanca, Jose
Pons, Clara
Montero-Pau, Javier
Sanchez-Matarredona, David
Ziarsolo, Peio
Fontanet, Lilian
Fisher, Josef
Plazas, Mariola
Casals, Joan
Rambla, Jose Luis
Riccini, Alessandro
Pombarella, Samuela
Ruggiero, Alessandra
Sulli, Maria
Grillo, Stephania
Kanellis, Angelos
Giuliano, Giovanni
Finkers, Richard
Cammareri, Maria
Grandillo, Silvana
Mazzucato, Andrea 
Causse, Mathilde
Díez, Maria José
Prohens, Jaime
Zamir, Dani
Cañizares, Joaquin
Monforte, Antonio Jose
Granell, Antonio
Journal: JOURNAL OF EXPERIMENTAL BOTANY 
Issue Date: 2022
Abstract: 
A comprehensive collection of 1254 tomato accessions, corresponding to European traditional and modern varieties, early domesticated varieties, and wild relatives, was analyzed by genotyping by sequencing. A continuous genetic gradient between the traditional and modern varieties was observed. European traditional tomatoes displayed very low genetic diversity, with only 298 polymorphic loci (95% threshold) out of 64 943 total variants. European traditional tomatoes could be classified into several genetic groups. Two main clusters consisting of Spanish and Italian accessions showed higher genetic diversity than the remaining varieties, suggesting that these regions might be independent secondary centers of diversity with a different history. Other varieties seem to be the result of a more recent complex pattern of migrations and hybridizations among the European regions. Several polymorphic loci were associated in a genome-wide association study with fruit morphological traits in the European traditional collection. The corresponding alleles were found to contribute to the distinctive phenotypic characteristic of the genetic varietal groups. The few highly polymorphic loci associated with morphological traits in an otherwise a low-diversity population suggests a history of balancing selection, in which tomato farmers likely maintained the morphological variation by inadvertently applying a high selective pressure within different varietal types.
URI: http://hdl.handle.net/2067/47490
ISSN: 0022-0957
DOI: 10.1093/jxb/erac072
Rights: Attribution 4.0 International
Appears in Collections:A1. Articolo in rivista

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