• Korean Journal of Agricultural and Forest Meteorology
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• v.8 no.3
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• pp.183-189
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• 2006

Six japonica and three Tongil type cultivars that were released in different years and planted to a large area during different periods were grown at the experimental farm of Seoul National University in 2001 and compared for traits related to dry matter production and grain yield. The varieties chosen were Jodongji released in 1896, Paldal in 1944, Jinheung in 1962, Nagdong and Tongil (Tonsil type) in 1971, Milyang#23 (Tongil type) in 1976, Hwasung in 1986, Ilpum in 1991, and Dasan (Tonsil type) in 1996. The more recent cultivars tended to have lower canopy light extinction coefficients (K). The K value was 0.601 in the oldest cultivar, Jodongji, and decreased below 0.5 in the cultivars released since 1971. Radiation use efficiency (RUE) was significantly different among cultivars before heading stage, showing no consistent tendency with the year of release and not significantly different after heading. Leaf area duration (LAD) was significantly different among varieties, and LAD values tended to be higher in the more recent cultivars. In particular, this tendency was more obscure in Tongil type cultivars. LAD of whole growth period had a significantly positive correlation with dry matter yield at harvest $(r=0.776^*)$. Dry matters measured at heading and harvest tended to be higher in recently released cultivars, but not significantly. The grain yield of Jodongji was the lowest but there was no significant difference among the other varieties in japonica, while higher yield occurred in the more recent Tongil type. Grain yield was correlated with grain number per square meter, and the more recent Tongil type cultivars had the greater grain number per square meter, In conclusion, not only the dry matter and grain yield but also related traits except K value showed no clear changes when compared with the year of their release in japonica cultivars. However, the increased grain yield in the more recent Tonsil type cultivars might have resulted from the enhanced LAD that lead to the higher dry matter production and in turn to the enlarged sink size.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.5-5
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• 2023

감자(Solanum tuberosum L.)는 식물학적 분류상으로 가지과에 속하는 작물로, 재배기간이 짧고 단위면적당 생산량이 많아 세계적으로 벼, 밀, 옥수수에 이어 네 번째로 재배되고 있다. 감자의 원산지는 남아메리카 안데스 산맥의 고원지대로 유럽을 거쳐 여러 나라들로 퍼져나갔으며, 1824년경 우리나라로 감자가 들어왔다는 기록이 남아있다. 국내 감자 재배작형 비율을 살펴보면, 봄재배가 63%, 여름재배 16%, 가을감자 14%, 그리고 겨울시설재배가 7% 정도를 차지하고 있으며 소비자들에게 연중 햇감자를 공급하고 있다. 1960년대부터 국내에서 감자 교배육종을 시작하면서 육종기반을 구축하였으며 현재까지 40여 품종을 육성하였다. 과거에는 부족한 주식을 대체하기 위한 구황작물로 감자를 주로 소비하였기 때문에, 식용감자 품종 위주로 선발하기 위하여 조숙성과 수량성에 중점을 두어 '조풍', '추백' 등의 품종을 육성하여 보급하였다. 최근 국민 소득의 향상과 식습관 변화 등으로 식품 소비구조가 다양화되면서 감자를 식용뿐만 아니라 감자칩, 프렌치프라이 등 가공제품이나 더 나아가 화장품 원료로 이용되면서 육종 방향과 목표를 다양하게 설정하여 품종을 육성하고 있다. 그 결과로, 전분함량이 높고 칩가공성이 우수한 '다미', '골든볼', '은선' 등 칩가공용 품종, 감자모양이 길고 건물함량이 높아 가공적성이 우수하고 프렌치 프라이로 적합한 '골든에그'와 '얼리프라이', 기형, 열개 등 생리장해 발생이 적고 일반 부식용인 '수선', '추원' 등 다양한 용도를 가진 품종을 육성하여 보급하고 있다. 이와 같이 현재까지 육성된 감자 용도별 주요 품종들의 현황과 육종 방향에 대해서 소개하고자한다.

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.616-619
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• 2009

국내 육성 품종 JW07-190, JW07-192과 일본산 도입 품종 Meiryoku (MR), Ryoufuu (RF), Yamanoibuki (YI) 대해서 80% 메탄올 추출물을 공시 재료로 ESR을 이용하여 항산화 효능을 평가하였다. 국내 육성 품종인 JW07-192에서 DPPH radical, alkyl radical, hydroxyl radical에 대해 비교적 높은 radical 소거능을 보였고, 모든 녹차 품종에서 강력한 DPPH radical 소거능을 보였다. 전체적으로, 국내 육성 품종인 JW07-192가 일본 도입 품종과 비교하였을 때 더 좋은 항산화 효능을 나타내었다. 총 폴리페놀 함량은 국내 육성 계통인 JW07-192가 $431.57{\pm}28.45\;mg/g$로 가장 높은 함량을 나타냈고, 플라보노이드 함량은 도입 품종인 YI가 $313.44{\pm}6.31$로 가장 높은 함량을 보였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.28 no.1
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• pp.12-40
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• 1983

Heading behaviour of native japonica (GI) and Japanese varieties (GII) grown during 1910-1920s were thermo-sensitive, home bred varieties during 1930s (GIII) - 1950s (GIV) were photo-sensitive and semi-dwarf indica derived varieties released since 1971 (GV) were controlled by basic vegetative phase. Number of leaves on main culm was increased with varietal improvement and culm length was gradually shortened as variety improved. GV variety had the shortest plant height among the groups. The first internode length was about 30cm in all groups and difference of 2nd-4th internode length was caused shortening the culm length. Panicle length and diameter of panicle neck were shortened and became thinner as variety developed from GI to GIV, however, GV had longer panicle and thick panicle neck, respectively. Number of panicles/hill and straw weight/hill increased and became heavier as variety improve from GI to GIV but GV had moderate number of panicle/hill and relatively light straw weight. Number of spikelet/panicle has been reduced with varietal improvement but GV had the biggest number. Grain yield/hill also increased as variety improved, however, it was decreased as transplanting season postponed and GV had shown the most sensitive difference. Top dry matter weight at heading stage and at 20 days after heading (20 DAH) had no difference among the groups except GI which was the smallest. Average grain weight at 20 DAH was heavier in the order of GI > GII, GV > GIV > GIII. It had a little variation in GI & GII while that of other variety group showed significant decrease as transplanting delayed. Harvest index (HI) of GV was the highest at 54% for the earlier transplanting and GIII had the lowest HI. Difference of HI became conspicuous for the later transplanting, the varieties bred later had the lower HI when transplanting of rice delayed. At the earliest transplanting applied (May 15), the grain yield was higher in the order of GI > GIV > GIII > GII > GI, however, that of Tongil type variety (GV) was the lowest for the latest transplanting (June 29). Interrelationship among the agronomical characteristics and grain yield was discussed.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.5
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• pp.440-448
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• 1990

To obtain the basic information an seed quality improvement in sesame, protein content of 114 varieties and amino acid composition of 12 varieties was analyzed. Protein content showed the vaietal difference ranged 20.6-30.2% and the mean was 24.72%. The highest variety in protein content was PI158066 (30.2%) originated from U.S.A. Protein content of Korean local varieties were highest among original group analyzed. Seed coat texture and seed coat color affected to protein content so, smooth type was higher than rough type in protein content, and black seeded varieties showed the hight protein content. Amino-acid composition of sesame was uneque in balance and higher than FAO reference. Total amino-acid of variety PI258372 was highest as 25.03%. Essential amino-acid (EAA) /total amino-acid(TAA) ratio of sesame was higher as 42-58.2% than soybean, corn, rice, peanut. Korean local variet 'Samcheck' showed best quality in amino-acid composition as 58.2% in EAA/TAA ratio with high tyrocin and lysine. Total amino acid content was high in order of Korean local '||'&'||'gt; introduced '||'&'||'gt; Korean bred varieties.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.34 no.3
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• pp.124-139
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• 2016

This study was carried out to characterize 127 recently developed cultivars of Rose of Sharon (Hibiscus spp.) in Korea and foreign Countries for landscape uses. The examined factors were growth characteristics such as tree height of a 1-year grafted plant(cm), plant type, growth habit, leaf characteristics such as shape and size, flower characteristics such as color, shape, size, and red eye during 2014 and 2015 for landscape uses. The results are obtained as follows; In the results of flower color of the 127 recently developed cultivars, pink color with red eye spot, white color with red eye spot, purplish red color with red eye spot, violet purple color with red eye spot, crimson color with red eye spot, asadal, blue color with red eye spot, and white color were distributed. In the flower characteristics, Hibiscus hybrid 'Daewangchun' had the largest flower size of 16.0cm out of the 127 cultivars. H. syriacus 'Antong', 'Lil Kim', and 'Ggoma' were cultivars with smaller flowers than other cultivars. H. syriacus 'Hunjang' had largest red eye, of 5.2cm of length compared to the other cultivars. The cultivars with unique flower color for landscape uses are H. syriacus 'Kwangmyung', 'Nanpa', 'North face', 'Bulsae', 'Bidan', 'Songam', 'Youngchang', 'Jukpeoso', 'Kiho', 'Tamla', 'Hwasoored' and 'Hwanhee'. These flowers had a purplish red color and were developed in Korea. H. syriacus 'Aphrodite', 'Dr. Uemoto', 'Freedom', 'Pink Cup', 'PS 80-1', 'Purpureus Variegatus', 'Red Giant', 'Woodbridge' also had unique flowers with a purplish red color and were introduced from foreign countries. In addition, cultivars with violet pink flowers were H. syriacus 'Ggoma', 'Doturak', 'Myungmi', 'Byunghwa', 'Sancheonyu', 'Taehwa', 'Hikari-hanagasa', and 'Little Kim Violet'. 'Jongmoo' and 'Ruffled Satin' had flowers with crimson color. Therefore, the new cultivars with unique flower colors were a promising cultivars to a woody landscape plant. Cultivars with large flower sizes were Hibiscus hybrid 'Daewangchun', Hibiscus hybrid 'Daemang', and Hibiscus hybrid 'Jina'. H. syriacus 'Ggoma', 'Mibeak', 'Antong', 'Lil Kim', and 'Eunhasu' had small flower sizes. Cultivars with long red eye were H. syriacus 'Hunjang' and H. syriacus 'Hi Lea Red'. Therefore, the new cultivars, Hibiscus hybrid 'Daewangchun', Hibiscus hybrid 'Daemang', Hibiscus hybrid 'Jina' with large flower sizes, H. syriacus 'Ggoma', 'Mibeak', 'Antong', 'Lil Kim', and 'Eunhasu' with small flower sizes, H. syriacus 'Hunjang' and H. syriacus 'Hi Lea Red' with long red eye, were promising cultivars to a woody landscape plant.

• 농업기술회보
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• v.40 no.6 s.480
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• pp.34-38
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• 2003

• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.401-407
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• 2008

This study was conducted to develop the DNA markers for identification of the strawberry cultivars in Korea and Japan. We developed fifteen cleaved amplified polymorphic sequence (CAPS) markers based on the Fragaria gene sequences. Among them six CAPS markers showed polymorphism exclusively in one cultivar. Five CAPS markers (ANR-MspI, ANR-BamHI, ACO-HinfI, DFR-AseI, FGT-MspI) provided enough polymorphism to identify eight Korean strawberry cultivars except for 'Maehyang' and 'Sunhong'. To complement the fifteen CAPS markers, we selected another fifteen sequence-related amplified polymorphism (SRAP) and one of them, me1/em5_460bp marker, made it possible to discriminate between 'Maehyang' and 'Sunhong'. Therefore, application of the five CAPS markers and one SRAP marker were sufficient to identify the nineteen Korean and Japanese strawberry cultivars. These markers could be used practically for cultivar identification of Korean and Japanese strawberry.

• Proceedings of the Korean Society of Crop Science Conference
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• 1983.05a
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• pp.1-1
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• 1983

• Journal of Plant Biotechnology
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• v.43 no.3
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• pp.367-375
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• 2016

In the present study, we conducted genetic characterization of 90 commercial maize varieties and parental lines using microsatellite markers. Thirteen microsatellite markers were selected from 100 primer pairs in the maize genome data on the basis of polymorphism information contents (PIC) value and distinct amplification products. These markers detected 5 to 24 alleles, with an average of 13.69. The mean PIC value was 0.865 and ranged from 0.716 to 0.942. The unweighted pair-group method with arithmetical average (UPGMA) analysis was conducted for constructing the dendrogram using Jaccard's genetic similarity coefficient. The genetic similarity varied from 0.07 to 0.824. Thirteen microsatellite markers identified all 90 maize varieties and parental lines. The maize varieties were clustered into 5 major groups consistent with type and pedigree information. The microsatellite profile database of maize varieties could be used to select comparative varieties through genetic relationship analysis between existing varieties and candidate varieties in distinctness tests.