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  • Author or Editor: Fred F. Angell x
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Abstract

Four processing tomato cvs. Chico III, Merit, Dorchester and Campbell 28 were sampled biweekly throughout the harvesting season in 1972 and 1973. Seasonal variation was noted in soluble solids, pH, ascorbic acid and color. The color and pH of tomatoes reached maximum values between 89 and 105 days after planting while soluble solids were generally higher between 76 and 106 days after planting. There was no trend in the variation of ascorbic acid throughout the sampling period. In some cases, however, there was a lower ascorbic acid content in fruits toward the end of the harvesting season. Of 5 climatic factors measured in both years, temperature and radiation were implicated as affecting tomato fruit quality.

Open Access

Abstract

Resistant plant introduction (P.I.) 129027 was hybridized with susceptible ‘Roma’ and ‘Heinz 1350’, and P.I. 127833 was hybridized with ‘Heinz 1350’. Plants of 6 populations (P1, P2, F1, F2, B1P1, and B1P2) of each of 3 crosses (127833 × ‘Roma’, 127833 × ‘H-1350’, 129027 × ‘Roma’) were field-grown and fruits were inoculated in a laboratory. Genetic analysis indicated presence of a leading factor and that 6 genes might be involved in anthracnose reaction. Resistance was partially dominant to susceptibility, and genetic variance was non-additive.

Open Access