| Autor: |
Dani Zamir, Clara Pons, Andrea Mazzucato, Stephania Grillo, Mathilde Causse, Peio Ziarsolo, Maria Cammareri, Silvana Grandillo, Angelos K. Kanellis, Mariola Plazas, Antonio J. Monforte, José Blanca, Maria Sulli, Javier Montero-Pau, Alessandro Riccini, Joan Casals, Lilian Fontanet, Giovanni Giuliano, Samuela Pombarelli, Antonio Granell, Josef Fisher, David Sanchez-Matarredona, Jaime Prohens, Joaquín Cañizares, María José Díez, Richard Finkers, José Luis Rambla, Alessandra Ruggiero |
| Rok vydání: |
2021 |
| Předmět: |
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| DOI: |
10.1101/2021.10.26.465840 |
| Popis: |
A comprehensive collection of 1,254 tomato accessions corresponding to European heirlooms and landraces, together with modern varieties, early domesticates and wild relatives, were analyzed by genotyping by sequencing. A continuous genetic gradient between the vintage and modern varieties was observed. European vintage tomatoes displayed very low genetic diversity, with only 298 loci out of 64,943 variants being polymorphic at the 95% threshold. European vintage tomatoes could be classified in several genetic groups. Two main clusters consisting of Spanish and Italian accessions showed a higher genetic diversity than the rest varieties, suggesting that these regions might be independent secondary centers of diversity and 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 GWAS with fruit morphological traits in the European vintage collection, and 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 diversity-poor genome suggests a history of balancing selection, in which tomato farmers maintained the morphological variation by applying a high selective pressure within different varietal types.HighlightThe high phenotypic diversity observed among European vintage varieties was created by traditional farmers by combining very few polymorphic loci subjected to balancing selection. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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