A New High-Yielding, Storability Leaf Lettuce Cultivar, “Jeoksagye”

A new high yield and storability lettuce (Lactuca sativa L.) cultivar “Jeoksagye” was developed from a cross NAAES DL 114 (late bolting and high yield) and NAAES DL 108 (late bolting and disease resistance) in 1997. We selected desired characteristics in advanced lines generated by pedigree method until 2001. Especially, we advanced two generations in 2001, and four lines were selected. These lines were evaluated for yield and stability in 5 areas (Gangwon, Gyeonggi, Chungbuk, Gyeongnam, and Jeju) for 2 years in Korea. The “Jeoksagye” has gray seed color and transverse elliptic leaves. Compared to Ttugseom-jeokchugmyeon marketable yield of “Jeoksagye” was heavier as a 513 g per plant, 1.5 times more than that of per leaf, and also can be stored 3 weeks more at 4oC. The taste of “Jeoksagye” is sweet and contains less amount of total bitter sesquiterpene lactones (BSL) of 132.1 μg/g than the check variety of 324.1 μg/g dry weight.