ARS | Publication request: THE RELATIONSHIP OF FRUIT SUGAR CONCENTRATION AND LINKED RAPD MARKERS WITH PHYSICAL AND CHEMICAL TRAITS IN TOMATO

Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: May 15, 2003
Publication Date: July 1, 2003
Citation: GEORGELIS, N., SCOTT, J.W., BALDWIN, E.A. THE RELATIONSHIP OF FRUIT SUGAR CONCENTRATION AND LINKED RAPD MARKERS WITH PHYSICAL AND CHEMICAL TRAITS IN TOMATO. HORTSCIENCE. 2003. v. 18. p. 717.

Technical Abstract: The small-fruited cherry tomato accession PI 27048 (Lycopersicon esculentum var. cerasiforme) with high fruit sugars was crossed to a large-fruited inbred line Fla. 7833 that had normal (low) fruit sugars. Sugars in the F2 were positively correlated with soluble solids, glucose, fructose, pH, and titratable acidity. Sugars were inversely correlated with fruit size. Indeterminate plants had significantly more sugars than determinate plants. Yield, earliness, and pedicel type were not significantly correlated with sugars at P=0.05. Six Random Amplified Polymorphic DNA (RAPD) markers linked to high sugars were found, five dominant and one co-dominant. These resided in at least three linage groups. Five of the markers were also linked to small fruit size, one to low yield , and one the indeterminate plant habit. Combinations of markers were tested for breeding purposes. All the markers together explained 35% of sugar variation in the F2 grown in Spring 2002.