Zooming in on a quantitative trait for tomato yield using interspecific introgressions

Eyal Fridman, Fernando Carrari, Yong Sheng Liu, Alisdair R. Fernie, Dani Zamir*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

442 Scopus citations

Abstract

To explore natural biodiversity we developed and examined introgression lines (ILs) containing chromosome segments of wild species (Solanum pennellii in the background of the cultivated tomato (S. lycopersicum). We identified Brix9-2-5, which is a S. pennellii quantitative trait locus (QTL) that increases sugar yield of tomatoes and was mapped within a flower- and fruit-specific invertase (UN5). QTL analysis representing five different tomato species delimited the functional polymorphism of Brix9-2-5 to an amino acid near the catalytic site of the invertase crystal, affecting enzyme kinetics and fruit sink strength. These results underline the power of diverse ILs for high-resolution perspectives on complex phenotypes.

Original languageEnglish
Pages (from-to)1786-1789
Number of pages4
JournalScience
Volume305
Issue number5691
DOIs
StatePublished - 17 Sep 2004

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