Genetic diversity in a collection of Italian long storage tomato landraces as revealed by SNP markers array

Ignazio Poma, Mario Rosario Guarracino, Francesco Mercati, Valentina Tranchida-Lombardo, Paola Punzo, Francesco Sunseri, Mariano Avino, Stefania Grillo, Maria Carola Fiore, Marina Tucci, Cristina Patanè

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4 Citations (Scopus)

Abstract

Tomato (Solanum lycopersicum L.) is one of the most important crops worldwide. In this study, we used 7720 genome-wide SNPs to characterize the genetic diversity within a tomato germplasm collection enriched with 64 accessions from southern Italy of the so called “da serbo” type i.e. drought-tolerant and long storage landraces. Notwithstanding the relatively small collection area, 1575 (20.4%) polymorphic SNPs, mostly on Chr11, detected considerable levels of genetic variation. Maximum parsimony analysis of genetic distance revealed four main clusters and clearly separated most “da serbo” landraces from the outgroups. One of the clusters grouped the landraces from the Mount Vesuvius area, though no further indications of a geographic-specific structure were found. STRUCTURE analysis confirmed the presence of four genetic groups within the collection, with admixture between them. A survey of non-synonymous SNPs highlighted several mutations in genes related to stress tolerance and fruit maturation/quality. Overall, our results suggest possible exchange of “da serbo” genetic material between southern Italy regions and indicate that the long storage “da serbo” germplasm could be a promising reservoir of peculiar alleles for traits of interest.
Original languageEnglish
Pages (from-to)288-297
Number of pages10
JournalPLANT BIOSYSTEMS
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

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    Poma, I., Guarracino, M. R., Mercati, F., Tranchida-Lombardo, V., Punzo, P., Sunseri, F., Avino, M., Grillo, S., Fiore, M. C., Tucci, M., & Patanè, C. (2018). Genetic diversity in a collection of Italian long storage tomato landraces as revealed by SNP markers array. PLANT BIOSYSTEMS, 288-297.