Growth Analysis of Three Cucumber Lines Differing in Plant Habit

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Abstract
Growth analyses were conducted in the greenhouse on two commercial lines, ‘Calypso’ and M 21 [of cultivated cucumber (Cucumis sativus L. var. sativus] differing in growth habit and one line, LJ 90430, of the wild cucumber Cucumis sativus L. var. Hardwickii (R.) Alef., to determine relationships between morphological characteristics and fruit yield. Multiple fruiting in LJ 90430 was associated with high leaf area and multiple branching. The standard commercial pickling cultivar, Calypso, which usually produces one to two fruit per plant per harvest, had less leaf area and fewer branches per plant than LJ 90430. Competition between early fruit development and vegetative growth was possible in ‘Calypso’ and M 21, but not in LJ 90430, which did not begin fruit development until vegetative growth was completed. Dry weight percentage in the fruit of LJ 90430 was low initially and increased steadily until the final harvest. Dry weight percentages in the fruit of ‘Calypso’ and M 21 were high initially and decreased generally thereafter. Relative growth rates of the whole plant followed similar trends in LJ 90430, ‘Calypso’, and M 21.

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