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A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance
내도복 단교잡 사료용 옥수수 신품종 ‘청다옥’
Korean J. Breed. Sci. 2014;46(2):172-176
Published online June 30, 2014
© 2014 Korean Society of Breeding Science.

Beom-Young Son1*, Seong-Bum Baek1, Jung-Tae Kim1, Jin-Seok Lee1, Sun-Lim Kim1, Gun-Ho Jung1, Wook-Han Kim1, Jae-Hwan Roh1, Young-Up Kwon1, Hee-Jung Ji2, Chang-Suk Huh3, and Jong-Yeol Park4
손범영1* ・백성범1 ・김정태1 ・이진석1 ・김선림1 ・정건호1 ・김욱한1 ・노재환1 ・권영업1 ・지희정2 ・허창석3 ・박종열4

1National Institute of Crop Science, RDA, Suwon 441-857, Korea2National Livestock Research Institute, RDA, Suwon, 441-706, Korea3Gyeongbuk Agricultural Research and Extension Services, Daegu 702-010, Korea4Hongcheon Maize Experiment Station, Gangwon Agricultural Research and Extension Services, Hongcheon
1국립식량과학원, 2국립축산과학원, 3경북농업기술원, 4강원도농업기술원
Cheongdaok, a new single maize (Zea mays L.) variety, was developed by the maize breeding team at the National Institute of Crop Science (NICS), RDA in 2010. This high-yielding hybrid was produced by crossing two inbred lines, KS159 and KS155. KS159 is the seed parent and KS155 is the pollen parent of Cheongdaok. It is a yellow dent maize hybrid. After the preliminary yield trial and advanced yield trial of Cheongdaok in Suwon for two years, the regional yield trial was subsequently carried out for evaluation of its growth characteristics and yield at four different locations from 2008 to 2010. The silking date of Cheongdaok is one day earlier than that of the check hybrid, Kwangpyeongok. Compared to Kwangpyeongok, the Cheongdaok show short in plant height and low in ear height ratio. It has resistance to lodging. The stay-green degree and the ear ratio of Cheongdaok are similar to Kwangpyeongok. It has moderate resistance to southern leaf blight (Bipolaris maydis) and strong resistance to northern leaf blight (Exserohilum turcicum). It has moderate resistance to black streaked dwarf virus (BSDV), ear lot, and corn borer. The dry matter yield 20.24 ton/ha and the total digestible nutrient (TDN) yield (13.80 ton/ha) of Cheongdaok were similar to Kwangpyeongok. The grain yield (8.51 ton/ha) of Cheongdaok was higher than that of Jangdaok. The seed production of Cheongdaok was well processed due to a good synchronization of flowering period during crossing between the seed parent KS159 and the pollen parent KS155, and the F1 seed yield was 1.8 ton/ha in Yeongwol.
Keywords : Maize, Crossing, Dry matter, TDN, Grain, Yield, Seed production

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