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Journal of Heredity Advance Access published online on March 15, 2008
Journal of Heredity, doi:10.1093/jhered/esm128
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© The American Genetic Association. 2008. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Molecular Aspects of Anthocyanin fruit Tomato in Relation to high pigment-1

Maya Sapir, Michal Oren-Shamir, Rinat Ovadia, Moshe Reuveni, Dalia Evenor, Yaakov Tadmor, Sahadia Nahon, Haviva Shlomo, Lea Chen, Ayala Meir, and Ilan Levin

From the Institute of Plant Sciences, The Volcani Center, PO Box 6, Bet Dagan 50250, Israel

Address correspondence to I. Levin at the address above, or e-mail: vclevini{at}volcani.agri.gov.il.

The tomato Anthocyanin fruit (Aft) genotype is characterized by purple color in skin and outer pericarp of its fruits due to higher levels of anthocyanins—flavonoid metabolites. Our objectives were to carry out metabolic and molecular characterization of this genotype, emphasizing its interaction with the high pigment-1 (hp-1) mutation, known to increase flavonoids in tomato fruits. These objectives fit the growing interest in developing tomato fruits with higher levels of functional metabolites. Our results show that 1) Aft fruits are also characterized by significantly higher levels of the flavonols quercetin and kaempferol, thus enhancing their functional value; 2) the tomato Anthocyanin1 (Ant1) gene, encoding a Myb transcription factor, displayed nucleotide and amino acid polymorphisms between the Aft genotype and cultivated genotypes; 3) a DNA marker based on Ant1 showed that the Aft trait is encoded by a single locus on chromosome 10 fully associated with Ant1; and 4) double homozygotes Aft/Aft hp-1/hp-1 plants displayed a more-than-additive effect on the production of fruit anthocyanidins and flavonols. This effect was manifested by approximately 5-, 19-, and 33-fold increase of petunidin, malvidin, and delphinidin, respectively, in the double mutants compared with the cumulative levels of their parental lines.

Corresponding Editor: Lisa Rowland

Received August 17, 2007
Accepted November 29, 2007


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