Natural Genetic Diversity in Tomato Flavor Genes

Overview

Journal Front Plant Sci

Date 2021 Jun 21

PMID 34149747

Citations 10

Authors

Lara Pereira

Manoj Sapkota

Michael Alonge

Yi Zheng

Youjun Zhang

Hamid Razifard

Nathan K Taitano

Michael C Schatz

Alisdair R Fernie

Ying Wang

Zhangjun Fei

Ana L Caicedo

Denise M Tieman

Esther van der Knaap

Affiliations

Soon will be listed here.

Abstract

Fruit flavor is defined as the perception of the food by the olfactory and gustatory systems, and is one of the main determinants of fruit quality. Tomato flavor is largely determined by the balance of sugars, acids and volatile compounds. Several genes controlling the levels of these metabolites in tomato fruit have been cloned, including , , , , and . The aim of this study was to identify any association of these genes with trait variation and to describe the genetic diversity at these loci in the red-fruited tomato clade comprised of the wild ancestor , the semi-domesticated species and early domesticated . High genetic diversity was observed at these five loci, including novel haplotypes that could be incorporated into breeding programs to improve fruit quality of modern tomatoes. Using newly available high-quality genome assemblies, we assayed each gene for potential functional causative polymorphisms and resolved a duplication at the locus found in several wild and semi-domesticated accessions which caused lower accumulation of lipid derived volatiles. In addition, we explored gene expression of the five genes in nine phylogenetically diverse tomato accessions. In general, the expression patterns of these genes increased during fruit ripening but diverged between accessions without clear relationship between expression and metabolite levels.

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