‘Hyowon 4’, a new medium maturing glutinous rice variety was developed by the rice breeding team of Pusan National University in 2013. This cultivar was derived from a cross between ‘Boseokchal’ and ‘Donna’ with good glutinous property. During F3~F8 generation, breeding lines were selected by a pedigree breeding method. As a result, the promising line (JS23-4-39-14-5-1-1-1) with good glutinous property was advanced and designated as the name of ‘SP 106’ in 2012. This variety headed on Aug. 15, which is 2 days later than ‘Dongjinchal’ in middle plane. The culm length and panicle length of this variety was 82.4 cm and 21.1 cm, respectively. This variety has about 13.9 tillers per a hill and 100 spikelets per a panicle. The ratio of ripened grain is about 92.0% and 1000-grain weight was 20.9 g in brown rice. The yield performance was 5.03 MT/ha in local adaptability test.

• 장성규(부산대학교 식물생명과학과) | Seong-Gyu Jang (Department of Plant Bioscience, Pusan National University, Miryang 50463, Korea)
• 이아림(부산대학교 식물생명과학과) | Ah-Rim Lee (Department of Plant Bioscience, Pusan National University, Miryang 50463, Korea)
• 임다은(부산대학교 식물생명과학과) | Da-Eun Im (Department of Plant Bioscience, Pusan National University, Miryang 50463, Korea)
• 왕항(부산대학교 식물생명과학과) | Heng Wang (Department of Plant Bioscience, Pusan National University, Miryang 50463, Korea)
• 박용진(공주대학교 식물자원학과) | Yong-Jin Park (Department of Plant Resources, Kongju National University, Yesan 32439, Korea)
• 이영상(순천향대학교 의료생명공학과) | Young-Sang Lee (Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea)
• 조유현(㈜ 시드피아) | Yoo-Hyun Cho (Seed Pia Co. Suwoen 16395, Korea)
• 권순욱(부산대학교 식물생명과학과) | Soon-Wook Kwon (Department of Plant Bioscience, Pusan National University, Miryang 50463, Korea) Corresponding author