• 한국작물학회지
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• 제47권5호
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• pp.335-340
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• 2002

To evaluate the efficiency of anther floating culture according to the maturing group, the varietal difference and classification of fifty varieties was conducted in N6 liquid medium containing 1mg $l^{-1}$ NAA, 0.25 mg $l^{-1}$ kinetin. The efficiency of callus induction was widely ranged from 0 to 113.4%, but the mean callus induction was not significantly different among maturing groups. The efficiency of anther floating culture showed the highest variation in early-maturing group among three maturing groups. The varieties with the best callus induction were Sambaegbyeo and Jinbuolbyeo, while the recalcitrant variety was Obongbyeo in early-maturing group. The efficiency of plant regeneration showed the highest trends in late-maturing group among three maturing groups. The fifty varieties were classified into three groups (distance=0.78) by cluster analysis based on the callus formation and plant regeneration. Group including only two varieties, Shinunbongbyeo and Sambaegbyeo had the excellent androgenic efficiency, and the medium efficiency of Group was included thirty-six varieties. Whereas twelve varieties, including three Tongil varieties were fell into the bad efficiency of Group. Especially, Tongil varieties containing Japonica rice, Obongbyeo were the recalcitrant genotypes for the anther floating culture.

• 한국작물학회지
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• 제49권3호
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• pp.199-206
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• 2004

Typhoon "MAEMI", happened in September 2003, hit the great damage to Gyeongnam province area. Especially, rice plant was lodged or severe leaf damage was caused. This study was conducted to find out the extents of leaf damage among different rice cultivars, and to evaluate rice yield and eating quality due to leaf damage after typhoon. Rice cultivars torn off over half of the flag leaf length (FLL) were one medium-late maturing cultivar (Donginl), medium maturing cultivar (Yeonganbyeo), eight early maturing cultivars (Samcheonbyeo, Jounghwnbyeo, Munjangbyeo, Taebongbyeo, Odaebyeo, Samhaegbyeo, Sobaegbyeo, Sinunbongbyeo), two long-il type cultivars (Samgangbyeo, Namcheonbyeo), and three special use cultivars (Heukseonchalbyeo, Jinbuchalbyeo, Yangjobyeo). Cultivars torn off below 1/10 FLL were eight medium-late maturing cultivars (Chucheongbyeo, Daecheongbyeo, Saechu cheongbyeo, Donganbyeo, Daeyabyeo, Hwamyeongbyeo, 방eongsanbyeo, Dongjinbyeo) and two medium maturing cultivays (Donghaebyeo, Gumobyeo2). The rest cultivars were tore off by 1/10∼1/2 ELL. In yield components, the longer was flag leaf damage, the lower was ripened grain ratio, grain weight and brown/rough rice ratio, which was severly impacted to late than to ordinary season cultivation. However, rice yield did not decrease up to tearing by 1/10 ELL. Head rice ratio decreased from flag leaf tearing over 1/10 ELL in late season cultivation. The longer was flag leaf damage, the lower was eating quality, which could not show significantly different.

• 한국작물학회지
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• 제23권1호
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• pp.81-85
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• 1978

Competitive ability was determined for two different varieties, Josaengtongil (early maturing indicajaponica type) and Jinheung (medium maturing japonica type), against Cyperus serotinus(nut sedge). An increase of rice density increased competitive ability of rice to C. serotinus. The results indicate that the use of tall and medium maturingvariety like Jinheung provides better competitive ability against C. serotinus than Josaengtongil, a semi-dwarf and early maturing type.

• 한국초지조사료학회지
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• 제32권3호
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• pp.229-236
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• 2012

본 시험은 2010년부터 2012년까지 3년동안 경북 성주 계명문화대학 실험목장에서 이탈리안 라이그라스 품종의 생육특성 및 건물수량을 평가하기 위하여 실시하였다. 시험설계는 조중생종은 품종을 처리로 12처리 3반복, 중만생품종은 품종을 처리로 10처리 3반복 난괴법으로 배치하였다. 1년차 시험은 2010년 10월 12일에 파종하여 조중생종은 2011년 4월 29일, 중만생종은 동년 5월 4일에 수확하였고, 2년차시험은 2011년 10월 3일에 파종하여 조중생품종은 2012년 5월 5일 중만생종은 동년 5월 12일에 수확하였다. 조중생 품종의 건물수량은 Yeonbong3, Seongnong, Winter Hawk, Pride 및 Kowinnearly 품종이 각각 9,850, 9,778, 9,486, 9,363 및 9,267 kg/ha 순위였으며 이들 품종 간에 수량 차이는 없었으나 다른 7품종 보다 높았다(p<0.05). 중만생 품종의 건물수량은 Tetragold, Hwasan 101, Jumbo, Sungrazer, Master, SelectIV 및 KB Royal이 각각 9,542, 9,492, 9,103, 8,981, 8,903, 8,870 및 8,681 kg/ha 순위였으며 이들 품종 간에 수량 차이는 없었으나, 다른 3품종 보다는 높았다(p<0.05). 내한성은 중만생 품종중에서 Hwasan 101가 다른 품종보다 높은 경향을 보였다. 본 시험의 결과에 의하면 조기수확 시 건물수량 측면에서 조중생 품종이 유리할 것으로 생각된다.

• 한국작물학회지
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• 제53권1호
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• pp.1-7
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• 2008

This experiment was carried out to evaluate the agronomic stability of North Korean rice varieties using the statistical model developed by Grafius, Finlay, and Ever hart. The lowest yearly variation based on coefficients of variation was found in Hannam 29 for number of panicles per hill, in Sijoong 9 for number of grains per panicle, in Pyeongyang 3 for ripened grain ratio, in Sijoong 16 for 1,000 grain weight, and in Yeomju 1 for grain yield. By Grafius's model, Pyeongbook 3, Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups show stable for 3 years. Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups were found to be highly stable as analyzed by both Finlay and Wilkinson's model and Everhart & Russell's model. With reference to three models, Weonsan 66 was highly stable for 3 years with showing more yield than Odaebyeo in early maturing groups while Seohaechalbyeo was highly stable for 3 years with showing high yield than Hwaseongbyeo in medium maturing groups above $5\;t\;ha^{-1}$ of milled rice respectively.

• 한국초지조사료학회지
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• 제16권4호
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• pp.291-298
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• 1996

This study was carried out at Crop Experiment Station in 1993 and 1994. The objective of this study was finding out variation of growth and yield of corn according to maturity. Hybrids of corn used in this study were early maturing corn Comet80, Elite90, Royaldent IOOT, Royaldent T$\times$llO, P3525, P3394, medium maturing corn Royaldent 120T. and late maturing corn Jungbuok, P3144W. G4743. Stalk height, leaf number, ear weight, stover weight, and TDN yield of early maturing corn were linearly increased with prolonged maturity in 1993 growing season. Leaf number, and stover weight of early and late maturing corn were linearly increased with prolonged maturity in 1994 growing season. But ear weight of late manuring corn was not increased as much as that of early manuring corn with prolonged maturity. Increase of total DM and TDN yield of late maturing corn was due to stover weight increase compared with ear weight increase of early maturing corn. Leaf number and stover weight were highly correlated with silk (Growing Degree Days) GDD.

• 한국초지조사료학회지
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• 제24권3호
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• pp.201-206
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• 2004

본 시험은 가을에 파종한 조, 만생품종 사초용 호밀의 생육특성 및 건물수량을 알기 위하여 실시하였다. 2002년 10월 3일과 2003년 10월 8일에 조생품종인 Koolgrazer을 대조품종으로 조생품종 9909, Ol-homil 및 Jlee select와 중생품종인 Homil 22 그리고 만생품종인 Danko, Kior, Amilo 및 Spooner을 각각 파종하였으며, 2003년 4월 22일과 2004년 4월 23일에 각각 수확하였다. 내도 복성은 조중생품종이 만생품종보다 다소 낮았다. 초고는 조중생품종이 만생품종 보다 길었다. $50\%$ 출수일은 조생품종이 2년 평균 4월 14일이었던 반면에 만생품종이 4월 24일로서 조생품종이 10일이나 더 빨랐다. CP 함량은 만생품종이 조생품종보다 높았으며, ADF와 NDF 함량은 조생품종이 높았다. 건물수량은 1년차 시험에서 조생품종Jlee select가 가장 높았으며(p<0.05), 9909와 Koolgrazer는 유사하였고, 중만생품종 Homil 22, Danko, Kior, Amilo 및 Spooner는 조생품종 보다 낮았다. 2년차 시험에서는 조생품종인 9909가 가장 높았으며(p < 0.05), Koolgrazer와 Ol-homil은 비슷하였고 Jlee select는 낮았고, 만생품종 Danko, Kior, Amilo 및 Spooner는 조생품종 보다 낮았다. 본 연구의 결과로 보아 2모작 작부체계에서 추파용 호밀은 조생품종이 적합하다고 생각된다.

• 한국작물학회지
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• 제14권
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• pp.133-137
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• 1973

우리나라 들깨 재래종 136과 일본품종 4합계 140품종에 대하여 개화 및 결실에 관한 제특성의 차이를 검토하며 품종의 생태형과 성숙군을 분류하고 이들 특성과 생태형, 성숙군간의 관계를 요약하면 다음과 같다. 1. 생태형의 분류는 개화일수의 단, 중, 장(I.II.III)에 결실일수의 단장(a,b)을 상호조합하여 Ia, Ib, IIa, IIb, IIIa, IIIb의 6형으로 나눈바 우리나라 재래종은 IIa, IIb 및 III형에 일본품종은 IIa, IIb에 각각 많이 속해 있었다. 2. 성숙군의 분류는 생육일수의 장, 단에 따라 조생 I에서 만생 III까지 3성숙군으로 나눈바 우리나라 재래종은 II군 및 III군에 일본품종은 I군과 II군에 각각 많이 속해 있었다. 3. 생태형과 성순군 사이에는 고도의 정(+)의 상관관계(0.685)를 볼 수 있었고 생태형은 개화일수, 생육일수와 성숙군은 개화일수, 결실일수 및 생육일수의 상호 유의적인 상관을 인정할 수 있었으나 우리나라 재래품종은 성숙군수가 많지 않지만 생태형 종수가 많다는 것은 도별로 환경조건과 재배방식간에 어떤 관계가 존재하는 것 같다.

• 농업과학연구
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• 제50권3호
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• pp.365-371
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• 2023

This experiment was carried out to breed a medium maturing variety of Italian ryegrass (Lolium multiflorum Lam.) in Grassland and Forage Crops Division, National Institute of Animal Science, Rural Development Administration (RDA), Cheonan from 2019 to 2020. An Italian ryegrass variety, IR 604 is a tetraploid variety with green in leaf color and has half-erect growth habit in late autumn and erect growth habit in early spring, IR 604 was on May 17 in heading date as a medium maturing variety. Also, IR 604 was longer by 11 cm in flag leaf length and longer by 1.3 cm in plant height than those of the control variety, Kowinner, respectively. IR 604 was also thicker by 1.0 mm in stem thickness and strong in winter hardness. Dry matter (DM) yield (11,036 kg/ha) of IR 604 was 16.6% higher than that of Kowinner. Total digestible nutrient (TDN), crude protein (CP) and relative feed value (RFV) of IR 604 were 60.4, 13.8% and 100.6 which are 1.4, 3.3%, 7.7 higher than those of Kowinner, respectively. Acid detergent fiber (ADF) and neutral detergent fiber (NDF) of IR 604 were 35.5 and 56.7% which are 1.3 and 3.6% lower than those of Kowinner, respectively.

• 대한원격탐사학회지
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• 제28권6호
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• pp.653-660
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• 2012

This study classified paddy fields according to rice varieties and monitored temporal changes in rice growth using SAR backscatter coefficients (${\sigma}^{\circ}$). A growing period time-series of backscatter coefficients was set up for nine fine-beam mode RADARSAT-1 SAR images from April to October 2005. The images were compared with field-measured rice growth parameters such as leaf area index (LAI), plant height, fresh and dry biomass, and water content in grain and plants for 45 parcels in Dangjin-gun, Chungnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) ranged from -18.17 dB to -6.06 dB and were lower than those for medium-late maturing rice varieties during most of the growing season. Both crops showed the highest backscatter coefficient values at the heading stage (late July) for early-maturing rice, and the difference was greatest before harvest for early-maturing rice. The temporal difference in backscatter coefficients between rice varieties may play a key role in identifying early-maturing rice fields. On the other hand, comparisons with field-measured parameters of rice growth showed that backscatter coefficients decreased or remained on a plateau after the heading stage, even though the growth of the rice canopy had advanced.