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현웅조(Ung-Jo Hyun),이정희(Jeong-Heui Lee),정응기(Eung-Gi Jeong),장재기(Jae-Ki Chang),정국현(Kuk-Hyun Jung),조영찬(Young-Chan Cho),이점호(Jeom-Ho Lee),원용재(Yong-Jae Won),서정필(Jung-Pil Suh),안억근(Eok-Keun Ahn),정종민(Jong-Min Jeo 한국육종학회 2019 한국육종학회지 Vol.51 No.4
‘Jinhan’, a japonica rice variety, was developed from a cross between ‘Cheolwon68’ (IT218244) and ‘Junghwabyeo’ (IT260473) by the rice breeding team at National Institute of Crop Science in 2015. ‘Cheolwon68’ is early maturing and resistant to blast disease, and ‘Junghwabyeo’ is a cold-tolerant and high-quality variety. The growth duration of ‘Jinhan’ in the paddy field was 116 days in the Northern Central Highland in Korea, which was similar to that of ‘Jinbu’. The culm length of ‘Jinhan’ was 61 cm, which was 10 cm shorter than that of ‘Jinbu’. The panicle of ‘Jinhan’ was composed of 66 spikelets. The viviparous germination rate of ‘Jinhan’ was 33.2%. ‘Jinhan’ showed resistance to blast disease, but was susceptible to stripe virus, dwarf and black-streaked dwarf viruses, and plant hoppers. The milled rice grains of ‘Jinhan’ showed an excellent palatability index (0.23) and lower protein content (5.7%) than that of ‘Jinbu’. The grain milling characteristics of ‘Jinhan’ were similar to those of ‘Jinbu’. ‘Jinhan’ showed a milled rice productivity of 5.43 MT/ha at four sites cultivated in the Northern Central Highland(Registration No. 7318).
김명기(Myeong-Ki Kim),신영섭(Young-Seop Shin),원용재(Yong-Jae Won),안억근(Eok-Keun Ahn),서정필(Jung-Pil Suh),정국현(Kuk-Hyun Jung),이점호(Jeom-Ho Lee),전용희(Yong-Hee Jeon),윤영환(Young-Hwan Yoon),윤광섭(Kwang-Sup Yoon),장재기(Jae-Ki 한국육종학회 2015 한국육종학회지 Vol.47 No.2
There are farmer’s demands to develop early-maturing cultivar in order to replace Odae variety to mid-northern inland plain and southern mountainous area of Korea. Saeodae was developed by the rice breeding team of Cheolwon Substation, National Institute of Crop Science (NICS), RDA in 2012. This cultivar was derived from the cross between Geuroobyeo and Suweon 472 in 2001 summer season, and selected by a promising line, SR27376-2-2-1-3, was selected and designated as the line of Cheolweon 81 in 2010. The local adaptability test of Cheolweon 81 was carried out at four locations from 2010 to 2012 and it was named as Saeodae. The heading date of Saeodae is July 25 in Cheolwon area, which is 2 days earlier than that of Odae. This variety has 66cm in culm length and 77 spikelets per panicle. Its 1,000 grain-weight of brown rice is 26.5 g, which is similar to that of Odae. Germination rate at low temperature of this variety is about 70%, and viviparous germination is 17.7%. Cold tolerance of this cultivar is still not good, just mediocre. It shows strong lodging resistance. And premature heading, occurrence of wilting during ripening stage, and leaf senescence at maturing are similar to those of Odae. This variety shows resistance to leaf blast disease, but susceptible to bacterial blight, virus disease and insect pest. This variety has translucent and clear milled rice kernel without white core and belly rice. The yield potential of Saeodae was about 5.26 MT/ha at ordinary fertilizer level in local adaptability test for three years. This variety would be adaptable to mid-northern inland plain and southern mountainous area of Korea.
호남평야지 재배시기별 조생종 벼 품종의 품질 및 호화점도 특성 분석
박현수(Hyun-Su Park),백만기(Man-Kee Baek),이창민(Chang-Min Lee),김석만(Suk-Man Kim),서정필(Jung-Pil Suh),정오영(O-Young Jeong),조영찬(Young-Chan Cho) 한국육종학회 2021 한국육종학회지 Vol.53 No.1
Early maturing rice is widely utilized to diversify cropping systems in the Honam Plain, Korea. It is based on the principle ofa short growth duration. There is concern regarding quality deterioration of early maturing rice owing to the high temperature during theripening stage as compared to that for mid and mid-late maturing rice. This study was conducted to analyze six pasting property-related andeight quality traits of six early maturing rice varieties (Jopyeong, Odae, Unkwang, Haedamssal, Jinkwang, and Haedeul) on early, ordinary,and late cultivations, and to interpret the relationships between genotypes and environments. As the cultivation time increased, the ratio ofhead rice (HR) and glossiness of cooked rice (Toyo value, TY) increased. The cumulative mean temperature of the ripening stage showeda strong negative correlation with HR and TY at all cultivation times. Pasting temperature, peak viscosity (PV), trough viscosity, final viscosity,and breakdown (BD) decreased, whereas setback (SB) increased as the cultivation time was delayed. Pasting properties were affected moreby climate conditions in the ripening stage than during the growth stage. Additive main effects and multiplicative interaction analysis revealedthat pasting property-related and quality traits were affected more by environment than genotype. Jinkwang and Haedamssal in early and ordinarycultivation and Jinkwang and Haedeul in late cultivation exhibited higher HR and TY and a lower protein content. They also showed higherPV and BD and lower SB, which are characteristics of good eating quality japonica rice. Jinkwang, Haedamssal, and Haedeul are premium-quality,early maturing rice varieties that were recently developed. The cultivation of these varieties could improve the grain quality of early maturingrice at high temperatures during the ripening stage in the Honam Plain.
고온조건에서 등숙이 양호하고 도열병에 강한 조생 고품질 벼 ‘중모1024’ 육성
정지웅(Ji-Ung Jeung),강경호(Young-Seop Shin),최임수(Im-Soo Choi),장재기(Jae-Ki Chang),김명기(Myeong-Ki Kim),이점호(Jeom-Ho Lee),박향미(Hyang-Mi Park),양창인(Chang-Ihn Yang),전용희(Yong-Hee Jeon),서정필(Jung-Pil Suh),최인배(In-Bae Cho 한국육종학회 2016 한국육종학회지 Vol.48 No.1
‘Jungmo1024’ is a blast resistant early maturing rice cultivar with high temperature tolerance during grain filling stage. ‘Jungmo1024’ was derived from a sodium azide treatment on ‘Suweon472’, a high yielding japonica elite line which was latterly registered as ‘Namil’. Comparison with the agronomical traits of ‘Namil’, ‘Jungmo1024’ was uniquely characterized as the induced gained function due to the reduced culm length, increased tiller number, strong blast resistance and especially high temperature tolerance during grain filling stage. The high temperature tolerance of ‘Jungmo1024’ was supported by two years experiments by comparing the head rice ratio produced in ordinary paddy field and green house condition. The heading date of ‘Jungmo1024’ was July 29 in central plain area, which was 9 days earlier than that of ‘Hwaseong’. The milled rice yield performance of ‘Jungmo1024’ was about 4.98 MT/ha in local adaptability test for three years. ‘Jungmo1024’ had 69 cm in culm length, which was 15 cm shorter than that of ‘Hwaseong’, 20 cm in panicle length, 16 in tiller number, and 22.3g in 1,000 grain-weight of brown rice. ‘Jungmo1024’ exhibited strong rice blast resistance, but do not have any clear resistance gene sources against bacterial blight, viral diseases and insect fests. ‘Jungmo1024’, nevertheless, would be a useful rice cultivar could be used as a donor line for the breeding programs for developing southern plane adaptable early maturing rice cultivars with enhanced rice blast resistance, lodging tolerance, and especially high temperature tolerance during grain filling stage.
조영찬(Young-Chan Cho),백만기(Man-Kee Baek),박현수(Hyun-Su Park),조준현(Jun-Hyun Cho),안억근(Eok-Keun Ahn),서정필(Jung-Pil Suh),정지웅(Ji-Ung Jeung),이종희(Jong-Hee Lee),원용재(Yong-Jae Won),송유천(Yoo-Chun Song),정응기(Eung-Gi Jeong 한국육종학회 2020 한국육종학회지 Vol.52 No.S
Rice research in Korea during the past 100 years has gone through tremendous changes and improvements as the country underwent a turbulent history of transformation. Full-scale R&D modernization began in the 1970s, when the government focused policy on achieving self-sufficiency in rice in order to establish the foundation for national economic growth. A major landmark was reached by the development of the rice variety “Tongil” and its cultivation technology, which was at the core of the unprecedented Korean “Green Revolution”. Since achieving self-sufficiency in rice, the breeding goal of Korea moved from increasing yield to improving grain quality as more consumers began to seek high quality food products in the 1980s. This change led to the establishment of the high quality rice breeding platform for enhancing the global competitiveness of Korean rice to cope with the opening of domestic rice market in the 2000s. Currently, the major breeding goals in rice are developing premium quality cultivars for table rice and specialized cultivars for boosting processed food industry. To date, the National Institute of Crop Science has released a total of 300 rice cultivars, including 202 table rice and 98 specialized usage cultivars. Diverse technologies have been developed and utilized for breeding new rice cultivars to meet changing needs. In the next 100 years of rice breeding, the convergence of traditional crop improvement technologies and the new breeding technologies utilizing recent advances in biotechnology will play a crucial role in enhancing breeding efficiency.