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"Jung-Hyeun Ji"

New Cultivar Developed

밥맛이 우수한 경기지역 적응 조생종 벼 ‘정드림’
‘Jungdream’—An Early Maturing and Good Eating-Quality Rice Cultivar Suitable for Growing in the Gyeonggido Province, South Korea
Jung-Hee Jang, Byoung-Rourl Choi, Tae-Jin Won, Ji-Hye Lee, Jong-Hyeong Lee, Sang-Wook Han, Jae-Eun Jang, Jae-Soon Seo, Jung-Hyeun Ji, In-Tae Park, Hae-Chun Choi, Gwang-Ho Kim
Korean. J. Breed. Sci. 2021;53(2):170-176.
Published online June 1, 2021
DOI: https://doi.org/10.9787/KJBS.2021.53.2.170

‘Jungdream’ is an early maturing, high-quality rice cultivar developed in 2017 by the crop breeding team at Crop Research Division, GARES, Hwaseong, Korea. ‘Jungdream’ was first developed in 2008 from crossing a medium-late maturity cultivar ‘Chilbo’ and an early maturity cultivar ‘Ungwang’. The heading date of this cultivar is July 28th in the Gyeonggido Province. Its culm length is 63 cm, and it has 19 panicles per hill and 82 spikelets per panicle. It is a medium-small grain brown rice cultivar with a 1000-grain weight of 20.6 g. Its cold tolerance is lower than that of ‘Hwaseong’, which is the standard cultivar in the central region, as is its degree of lodging tolerance. ‘Jungdream’ is resistant to rice blast and stripe virus diseases but is susceptible to bacterial leaf blight and other viral diseases and pests. The appearance of milled ‘Jungdream’ rice is clear, and its amylose content is 16.5%, which is lower than that of ‘Hwaseong’. The palatability of cooked ‘Jungdream’ rice is better than that of ‘Chucheong’, which is the main cultivated crop in Gyeonggido. Its milling ratio is 75.0%, which is lower than that of ‘Hwaseong’. The yield of milled ‘Jungdream’ rice was 5.42 MT/ha in the local adaptability tests during standard cultivation in four regions from 2015 to 2017. ‘Jungdream’ is highly adaptable to the environmental conditions in the Gyeonggido Province (Registration No. 8236).

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경기북부지역 적응 조기출하용 조생 중간찰벼 신품종 ‘가와지1호’
An Early Maturing and Low Amylose Rice Variety ‘Gawagi1’ Adaptable to the Northern Regions of Gyeonggido Province, South Korea
Tae-Jin Won, Ji-Hye Lee, Jung-Hee Jang, Jong-Hyeong Lee, Sang-Wook Han, Byoung-Rourl Choi, Jae-Soon Seo, Jae-Eun Jang, Hyeun-Yong Do, Jung-Hyeun Ji, In-Tae Park, Hae-Chun Choi
Korean. J. Breed. Sci. 2019;51(4):537-542.   Published online December 1, 2019
DOI: https://doi.org/10.9787/KJBS.2019.51.4.537

‘Gawagi1’ is an early maturing, low amylose rice variety with a medium to short culm, developed by Gyeonggi-Do Agricultural Research & Extension Services, Hwaseong, Korea in 2016. ‘Gawagi1’ was derived from the cross between ‘Baegjinju’ and ‘Sangmibyeo’ in 2004. Heading date was 4th of August 15 day earlier than ‘Baegjinju’ in Gyeonggido. The culm length was 67 cm. It had 15 panicles per hill and 104 spikelets per panicle. It is a medium-grain variety whose 1,000 grains weight of brown rice is 19.3 g. The protein content of milled rice was 6.3%, which is higher than that of ‘Baegjinju’ and its amylose content was 8.2% which is lower than that of ‘Baegjinju’. Its milling ratio is 75.5%, which is higher than that of ‘Baegjinju’. The yield of milled rice was 4.99 MT/ha under the standard cultivation practices at the local adaptability tests in 3 regions from 2014 to 2016. ‘Gawagi1’ is highly adaptable to Gyeonggido, especially to the northern region of Han River. (Registration No. 7280)

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밥맛이 우수한 경기지역 적응 중만생종 벼 ‘참드림’
‘Chamdream’, A Medium-Late Maturing and Good Eating-Quality Rice Cultivar Highly Suitable for Growing in the Gyeonggido Province, South Korea
Jung-Hee Jang, Jong-Hyeong Lee, Sang-Wook Han, Ji-Hye Lee, Jae-Eun Jang, Jae-Soon Seo, Tae-Jin Won, Byoung-Rourl Choi, Jung-Hyeun Ji, In-Tae Park, Hyeun-Yong Do, Hae-Chun Choi, Gwang-Ho Kim, Eung-Gi Jeong, Yong-Jae Won
Korean. J. Breed. Sci. 2019;51(3):251-257.   Published online September 1, 2019
DOI: https://doi.org/10.9787/KJBS.2019.51.3.251

‘Chamdream’ is a medium-late maturing, high-quality rice cultivar developed in 2014 by the crop breeding team of Crop Research Division, GARES, Hwaseong, Korea, in cooperation with the rice breeding team of the National Institute of Crop Science, RDA, Korea. ‘Chamdream’ was first developed in 2004 from a backcross between the F1 hybrid ‘Samgwang/Jojeongdo’ and ‘Samgwang’ cultivar. The heading date of this cultivar is August 17th in Gyeonggido Province. Its culm length is 79 cm and it has 15 panicles per hill and 115 spikelets per panicle. It is a medium-grain brown rice cultivar with a weight of 22.9 g per 1,000 grains. Its cold tolerance is lower than that of ‘Hwaseongbyeo’ and its degree of lodging tolerance is similar to that of ‘Hwaseongbyeo’. This cultivar is resistant to bacterial leaf blight and stripe virus diseases and moderately resistant to rice blast diseases, but it is susceptible to other virus diseases and pests. The appearance of milled ‘Chamdream’ rice is clear and its protein content is 5.4%, which is lower than that of ‘Hwaseongbyeo’. The palatability of cooked ‘Chamdream’ rice is better than that of ‘Chucheongbyeo’ which is mainly cultivated in Gyeonggido. Its milling ratio is 76.8% which is higher than that of ‘Hwaseongbyeo’. The yield of milled ‘Chamdream’ rice was 5.9 MT/ha in the local adaptability tests in standard cultivation in four regions from 2012 to 2014. ‘Chamdream’ is highly adaptable to the environmental conditions of Gyeonggido Province, especially to the southern region of Han River. (Registration No. 6065)

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경기지역 적응 고품질 내도복성 벼 『맛드림』
A Medium-Maturing, Lodging Tolerant, and Good Eating-Quality Rice Variety ‘Matdream’
Jung-Hee Jang, Jung-Hyeun Ji, Sang-Wook Han, Jung-Su Park, Byoung-Rourl Choi, Hee-Dong Kim, Hyeun-Yong Do, Soon-Jae Kim, Hae-Chun Choi, Gwang-Ho Kim, Young-Chan Cho, Myeong-Ki Kim, Im-Soo Choi
Korean. J. Breed. Sci. 2018;50(3):324-330.   Published online September 1, 2018
DOI: https://doi.org/10.9787/KJBS.2018.50.3.324

‘Matdream’ was derived from a cross between ‘Yeongdeok34(Pungmi)’ and ‘Ilpumbyeo’ in 2001. This variety had a heading date of August 8 in Gyeonggido. It had a semi-elect plant type and resistance to lodging with strong culm. Its culm length was 78 cm. This variety had 12 tillers per hill and 122 spikelets per panicle. It was a medium grain variety, and the 1,000 grain weight of brown rice was 22.2 g. Its cold tolerance was stronger than that of ‘Hwaseongbyeo’. This variety had wind tolerance. It was moderately resistant to rice blast diseases and had stripe virus resistance, but was susceptible to bacterial leaf blight, other virus diseases, and insect pests. Its appearance of milled rice was clear and its milled rice had lower amylose and protein contents than that of ‘Hwaseongbyeo’. Its palatability of cooked rice was better than that of ‘Chucheongbyeo’, which was harvested in Suwon. Its head-rice percentage after milling was 74.4%, which was higher than that of ‘Hwaseongbyeo’. The yield of milled rice was 5.17 MT/ha under the ordinary culture of the local adaptability test in four areas of Gyeonggido for three years. Under early transplanting cultivation, its yield of milled rice in 2011 was 5.69 MT/ha in the central plain area, Suwon. ‘Matdream’ was highly adaptable to the Gyeonggido area, especially to the northern region of Han River (품종보호번호: 제5087호).

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