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김주현(Zhoo-Hyeon Kim) 한국원예학회 2008 원예과학기술지 Vol.26 No.4
Two lettuce (Lactuca sativa L.) varieties, ‘Oakleaf’ (P₁) and ‘Baimach’ (P₂), have different leaf lengths: the leaves of ‘Oakleaf’ are short, but those of ‘Baimach’ are very long. ‘Oakleaf’ was crossed with ‘Baimach’ to study the inheritance of leaf length in lettuce; also, F₂ and F₃ generations were made. The leaf length was evaluated on the second true leaf length of individual plants for each generation. The results indicated that the F₁ plants were intermediate between their parents, but close to shorter parent, which indicates that shorter characteristic is partial dominance. Furthemore, the F₂ population segregated in a 3:1 of short and long, showing that the longer leaf length is controlled by a single recessive gene. The results from F₃ families confirmed the F₂ result. The gene is designated ‘leaf length’ and symbolized as ‘lfl’.