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Late bolting and Deep Red Leaf Lettuce "Mihong"  

Jang, Suk Woo (Department of Horticultural Crop Research, National Institute of Horticultural & Herbal Science)
Hur, Youn Young (Department of Horticultural Crop Research, National Institute of Horticultural & Herbal Science)
Choi, Mi Ja (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Kwon, Young Seok (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Kim, Jeom Sun (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Lee, Jong Nam (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
Lee, Eung Ho (Department of Horticultural Crop Research, National Institute of Horticultural & Herbal Science)
Seo, Myeong Hun (Gyeonggi-do Agric. Res. and Extension Services)
Park, Jae Ho (Chungcheongbuk-do Agric. Res. and Extension Services)
Jang, Ik (Jeollabuk-do Agric. Res. and Extension Services)
Jang, Mi Hyang (Jeollanam-do Agric. Res. and Extension Services)
Hwang, Hae June (Gyeongsangnam-do Agric. Res. and Extension Services)
Ko, Sun Bo (Jeju-do Agric. Res. and Extension Services)
Publication Information
Korean Journal of Breeding Science / v.41, no.4, 2009 , pp. 579-582 More about this Journal
Abstract
A new red leaf lettuce (Lactuca sativa L.) cultivar, "Mihong" which has late bolting and deep red leaf color was developed from a cross of "Danhongongchukmyeon" (deep red but early bolting and low yield) and "Hajicheongchukmyeon" (late bolting and high yield). The selection and breeding of advanced lines were done by pedigree method during 2000-2006. The advanced lines were evaluated for yield and adaptability in Korea (Gangwon, Kyunggi, Chungbuk, Kyungnam, Jeonnam, Jeonbuk, and Jeju) from 2007 to 2008. The "Mihong" has gray seed color, traverse elliptic leaves and deep red color. Compared to "Dukseomjeokchukmyeon", marketable yield of "Mihong" was higher by 2% (at 291 g per plant) as a 17.3 ton/ha, but with particularly improved good expression of deep red leaf color in high temperature cultivation in the field. The shelf-life of "Mihong" was three weeks longer than "Dukseomjeokchukmyeon" at $4^{\circ}C$. The amount of anthocyanin content of "Mihong" were higher than with "Dukseomjeokchukmyeon" at 28.9 mg/100 g. Especially the degree of leaf hardness in "Mihong" showed $26.9kg/cm^2$ compared to "Dukseomjeokchukmyeon". therefore, its taste is better, more crispy, and sweeter than "Dukseomjeokchukmyeon" This new cultivar "Mihong" can be cultivated in all year around even if summer time cultivation.
Keywords
leaf lettuce; red leaf color; shelf-life; taste; breeding;
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