• Korean Journal Plant Pathology
• /
• v.12 no.2
• /
• pp.231-236
• /
• 1996

한국에서 재배되고 있는 벼 품종의 도열별에 대한 지속저항성 품종을 조기에 선발, 보급할 수 있는 방법을 보색하기 위하여 1985년부터 1994년까지 온실 유묘검정, 밭못자리 및 포장검정을 통하여 저항성 정도를 평가하고 재배면적과 재배기간을 참고로 하여 지속저항성 품종을 선발하였다. 도열병에 대한 저항성 품종으로는 다양한 레이스에 침해되면서 개체당 병반수 20개 이내, 밭못자리검정에서는 평균 발병정도 5이하, 본답에서의 잎도열병은 병반면적율 0.5%이하, 이삭도열병 발생은 이병수율 5% 이내로 병발생이 비교적 적은 섬진벼, 팔공벼 및 동진벼를 선발하였고, 지속저항성 품종으로는 재배기간이 10년 이상 유지되면서 재배면적은 전체재배 면적의 20% 이상을 차지하고 있는 품종 중 장기간 동안 저항성을 발현하는 동진벼를 선발하였다.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.34 no.1
• /
• pp.106-112
• /
• 1989

To investigate varietal differences of anther size, pollen shape, pollen fertility and other agronomic characters under low temperature condition. twenty rice varieties (5 Tongil and 15 Japonica type) were treated at 19$^{\circ}C$ water temperature from booting to heading stage. There was varietal difference of low temperature response which was indicated by the delayed heading, the shortening of culm and panicle length. and the decrease of grain fertility and yield potential resulted from cooling treatment at booting stage. The varieties with low fertility damaged by the low temperature treatment at booting stage showed low pollen density per anther. small or abnormal anthers and pollen, and many sterile pollens. Anther length was correlated significantly with the number of pollens per anther and pollen fertility.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.38 no.1
• /
• pp.38-45
• /
• 1993

Gel consistency data collected from various experiments in same location during 1988 to 1992 were analysed to clarify the degree of varietal and environmental variation in rice. Most of japonica and Tongil-type rice varieties were belonged to soft gel consistency, and average gel length of japonica rice was longer than that of Tongil-type varieties. Gel length of glutinous rice cultivars was extremely long, near 100mm. Year variation of gel consistency was recognized, but did not affect on varietal difference. Gel consistency of most rice varieties and pedigree lines tested varied slightly between different seeding dates or nitrogen levels, but gel length of two indica rice varieties were decreased with the later seeding dates or the higher nitrogen levels. Rice varieties belonged to extremely hard or extremely soft gel consistency showed less variation of gel length between different years, seeding dates or nitrogen levels compared with intermediate ones.

• Korean journal of applied entomology
• /
• v.36 no.2
• /
• pp.185-191
• /
• 1997

One hundred seventy five red pepper varieties were bioassayed for selecting resistant varieties to northern rootknot nematode, Meloidogyne hapla. Fifteen native varieties (IT 102794, 104806, 105516, etc) and two imported varieties were proved to be resistant while the currently cultivated varieties such as Hongtap, Kangsan, Hongsil, and Bookang were moderately resistant to the nematodes. Resistant varieties resulted in less nematode infection and development than did the susceptibles. Roots of the resistant strains had significantly higher esterase and peroxidase activities than did those of the susceptibles.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.25 no.1
• /
• pp.87-91
• /
• 1980

The competitiveness of 7 soybean (Glycine max (L) Men.) cultivars to weeds were studied. The two soybean cultivars that showed the greatest competitiveness to weeds by maintaining their yields were Suweon 83 and Dongbuktae; whereas the least competive were Columbus and Harosoy.

• Food Industry And Nutrition
• /
• v.8 no.3
• /
• pp.34-39
• /
• 2003

본 연구는 수출용 가지를 최적 염절임 조건으로 절임한 후 저장 중 품질 변화에 대하여 조사하였다. 저장 기간이 길어질수록 모든 조건에서 명도와 황색도는 증가하지만, 진공포장한 절임가지의 명도와 황색도는 침지저장한 것에 비해 변화가 적었다. 절임가지의 염도는 절임초기에는 축양 품종과 시키부 품종에서 각각 24.67, 20.27%이었으며 진공포장 한 것은 저장 5일 이후에는 변화가 없었으나, 침지저장 한 것에는 저장중에 계속 감소하였다. pH의 변화는 품종과 저장방법에 관계없이 저장중에 감소하였으며, 수분함량은 절임중에 급격하게 감소하여 축양 품종과 시키부 품종에서 각각 79.93, 82.56%이었으며, 진공포장하여 저장한 절임가지에서는 5일째에 증가하였고 이후에는 변화가 없었으나. 침지저장 방법에서는 두 품종 모두 15일까지 증가하였다. 또한 수용성 단백질 함량의 변화도 수분 함량의 변화와 비슷하였다 비타민 C의 함량은 생가지 보다 두 품종 모두 최적조건으로 염절임 한 가지에서 높아 축양 품종과 시키부 품종에서 각각 21.41, 24.53 mg/100g이었으며, 저장중에 그 함량이 감소하였고, 진공포장 저장한 방법이 침지저장한 방법에 비해 감소하는 경향이 적었다 저장기간에 길어질수록 나트륨과 마그네슘의 함량은 감소하였으나 반대로 칼륨의 함량은 증가하였고 특히 침지저장한 방법에서 이와 같은 변화가 두드러졌다.

• Journal of Bio-Environment Control
• /
• v.22 no.2
• /
• pp.81-86
• /
• 2013

This experiment was carried out to select white asparagus varieties suitable for shading culture in greenhouse. Eight white and one green varieties were tested. Seeds were sown in 72-cell trays in a glasshouse on 24 Dec. 2008 and the seedlings were transplanted in a P.E house on 22 May 2009. Planting distances were 30 cm apart in a raw and 125 cm between the raws. For white asparagus production, small tunnel ($210cm{\times}160cm$) was established inside the P.E house, and covered with black and white P.E film (0.1 mm) on 5 March 2010. Days to sprouting took 5 days in 'Ravel' variety and took 16 to 18 days in 'Backlim', 'Horlim', 'Herkolim' varieties. The number of spear was highest in 'Ravel' with 6 and lowest in 'Backlim' with 3.7. The spear weight was heaviest in 'Herkolim' with 25.6 g and lightest in 'Ravel' with 15.6 g. The highest total yield was in 'Herkolim' with 296 kg/10a, followed by 'Super welcome' with 275 kg/10a and lowest in 'Rapsody' with 176 kg/10a. Marketable yields in 'Super welcome' and 'Herkolim' were 241 kg/10a and 239 kg/10a, respectively, and the yield was lowest in 'Rapsody' with 139 kg/10a. The L grade (over 20 g of spear weight) was highest in 'Herkolim'. Accordingly, 'Herkolim' was the most suitable white asparagus variety among the tested varieties for shading cultivation in greenhouse.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.24 no.3
• /
• pp.7-12
• /
• 1979

Seven hundred and forty eight rice cultivars were screened for drought tolerance at seedling stage in a special green house. A number of cultivars such as Wonkiljo, Hanyangdo, YR 52-$_{x}\textrm{BF}_7-67, Satominori, Mamoriaka, Akanomochi 114, Thkebenimochi, IR 937-55-3, IR2735-F_3B-6-2, IR 2871-53-2, $_{x}\textrm{BFI76}^9/Dwan, Khoo lliok Mali-4-2-105, Os6, Palawan, IRAT10, TOS 2583 and H-l05 seemed to be tolerant to drought at seedling stage. There was negative correlation between drought resistance score and growth of plant height and water content of culm and leaf after drought treatment, and highly positive correlation between resistance to blast and resistance to drought at seedling stage. There was no relationship between drought resistance and germination speed, plant height before drought treatment.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.50 no.3
• /
• pp.175-178
• /
• 2005

The research was conducted to evaluate a different seedling establishment of rice germplasms which were obtained from the IRRI (International Rice Research Institute) under the direct seeded condition. There was highly significant difference in terms of statistical analysis among cultivars. The seedling establishment of cultivars tested was the highest with ASD1 > IR50 > IR72 > Taothabi > Uplri5 > CO25 > Dula > Moroberakan. The difference of seedling establishment among cultivars particular in dry condition was high between ASD1 and Moroberakan and other cultivars.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.24 no.4
• /
• pp.301-308
• /
• 2004

This experiment was carried out to classify heading date of forage rye cultivars, and study agronomic characteristics, dry matter yield per ha and forage quality of winter rye cultivars in Suwon for 2 year from 2002 to 2003. The earliest cultivars among forage winter rye cultivars were Olhomil and Vitagrazer, which the heading date was April 21. The latest cultivar was Danko, which was May 5. Koolgrazer was April 26 and Homil 22 was April 30, respectively. Therefore, we classified the cultivars into three groups according to their heading date. The earliest group includes Olhomil, Vitagrazer, Paldanghomil, the middle group includes 5 cultivars which are Koolgrazer, Barrgazer, Maton, Wintergrazer and Homil22, and the latest group contains Humbolt and Danko. The number of tiller per $m^{2}$ of most cultivars were more than 1,000. The cultivar which has lowest tiller was Humbolt, which dry matter yield was the largest, and its tiller was 789. The lodging happened after each precipitation. Danko was the cultivar that has lowest lodging frequency. There has been little disease and insect and the difference in the quality of each cultivar. The yield of dry matters per ha of Humbolt was increased $123\%$, Vita grazer $121\%$, Maton $113\%$ comparing the standard cultivar, Kool grazer of 12,409kg, and Homil 22 was almost the same with the standard cultivar.