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Studies were conducted to obtain some basic data for breeding of oriental melon from cross between cultivars Eunchun and Sungwhan. The plant growth, net photosynthesis, fruit shape, yield and powdery mildew resistance of the F₁ hybrid were compared with its parents. No difference was observed in hypocotyl length of 12-day-old seedlings. The hybrid showed larger leaves than parental plants and was intermediate in vine length, fruit length, flesh thichness and fruit weight as compared with its parents, whereas fruit shape and rind color were similar to Sungwhan. Much more fruit sets and yield were observed in the F₁ hybrid. The highest net photosynthetic rate was found in Eunchun, but the F₁ hybrid was the same as Sungwhan. The infection rate of powdery mildew was significantly lower in the hybrid than its parents.
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