Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2067/51176
Titolo: Diversity and genetic architecture of agro-morphological traits in a Core Collection of European traditional tomato
Autori: Mazzucato, Andrea 
Pons, Clara
Casals, Joan
Brower Matthijs
Sacco Adriana
Riccini Alessandro
Hendrickx Patrick
del Rosario Figás Maria
Fisher Josef
Grandillo, Silvana
Soler Salvador
Zamir Dani
Causse Mathilde
Díez Maria José
Finkers Richard
Prohens Jaime
Monforte Antonio Jose
Granell Antonio
Data pubblicazione: 2023
European traditional tomato varieties have been selected by farmers given their consistent performance and adaptation to local growing conditions. Here we developed a multipurpose core collection, comprising 226 accessions representative of the genotypic, phenotypic, and geographical diversity present in European traditional tomatoes, to investigate the basis of their phenotypic variation, gene×environment interactions, and stability for 33 agro-morphological traits. Comparison of the traditional varieties with a modern reference panel revealed that some traditional varieties displayed excellent agronomic performance and high trait stability, as good as or better than that of their modern counterparts. We conducted genome-wide association and genome-wide environment interaction studies and detected 141 quantitative trait loci (QTLs). Out of those, 47 QTLs were associated with the phenotype mean (meanQTLs), 41 with stability (stbQTLs), and 53 QTL-by-environment interactions (QTIs). Most QTLs displayed additive gene actions, with the exception of stbQTLs, which were mostly recessive and overdominant QTLs. Both common and specific loci controlled the phenotype mean and stability variation in traditional tomato; however, a larger proportion of specific QTLs was observed, indicating that the stability gene regulatory model is the predominant one. Developmental genes tended to map close to meanQTLs, while genes involved in stress response, hormone metabolism, and signalling were found within regions affecting stability. A total of 137 marker–trait associations for phenotypic means and stability were novel, and therefore our study enhances the understanding of the genetic basis of valuable agronomic traits and opens up a new avenue for an exploitation of the allelic diversity available within European traditional tomato germplasm.
URI: http://hdl.handle.net/2067/51176
ISSN: 0022-0957
DOI: doi.org/10.3389/fpls.2022.936089
Diritti: Attribution 4.0 International
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