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  • Author or Editor: Timothy J Ng x
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Abstract

Data from 2 experiments, each involving a set of 6 muskmelon cultivars grown over a period of 4 years, were subjected to joint regression analysis to characterize performance across environments. ‘Burpee’ and ‘Gold Star’ were common to both experiments. A majority of the cultivars exhibited linear response for yield but not for fruit characteristics. There were also significant differences in regression coefficients among cultivars in each experiment. ‘Burpee’ and ‘Gold Star’ each had similar joint regression coefficients in both experiments for total weight of fruit per plant, but not for total number of fruit.

Open Access

Abstract

Fruits of tomato hybrids between the nonripening mutants rin and nor and a normal ripening cultivar, C17, ripen normally in terms of color and flavor. Compared to the normal ripening parent, the hybrids have delayed softening, lower pectolytic enzyme activities, and decreased solubilization of pectic substances. The nor mutant had a greater effect on these parameters than did rin in the heterozygous condition. Storage life of fruits produced from the nor hybrid was more than twice that of the normal parent. Utilization of nor heterozygotes to extend storage life would have a substantial impact on marketing of fresh tomatoes by reducing losses due to excessive softening.

Open Access