• 한국작물학회지
• /
• 제45권2호
• /
• pp.88-92
• /
• 2000

Excessive soil water in paddy field induces growth losses during the vegetative stages of soybean plants. Our objectives were to know growth responses of soybean as affected by the level of ridge heights. A field experiment was conducted at the Research Farm of Korea University near Seoul in 1996. Ten cultivars of soybean (Glycine max (L.) Merrill) were planted at the ridge heights of 10, 30, and 50cm in paddy soil on 27 June. Total dry matter accumulation at the 10cm ridge height was severely decreased until the growth stage of R5 as compared to the ridge heights of 30 and 50cm, and this decrement was mainly due to both reduced leaf and stem dry weights. However, seed dry weight was not significantly decreased at the lower ridge height with the increment of harvest index. Cultivar differences were found on seed dry weight, crop growth rate from R1 to R5, and leaf/stem ratio of R5. From the above results, soybean growth responses to excessive soil water in paddy field were different between seed filling stage and late vegetative to early reproductive growth stages.

• The Plant Pathology Journal
• /
• 제27권2호
• /
• pp.183-186
• /
• 2011

During the summer of 2005, specimens of soybean cultivars (Daepung, Daewon, Hwanggeum and Taegwang) showing frogeye leaf spot (FLS) were obtained from various areas in Korea. Eight isolates identified as Cercospora sojina were inoculated on the adaxial leaf surfaces of 63 Korean soybean cultivars; the disease responses to each isolate were evaluated 14 days and 21 days after inoculation. Based on the disease responses (resistant or susceptible) of the cultivars by the isolates, a set of cultivars (Anpeong, Bogwang, Cheongdu No. 1, Cheongja No. 3, Dachae, Daemang, Jangwon, Namhae, Sowon, Taegwang) were selected and inoculated with seven isolates for further testing pathogenic variance. Interestingly, 6 out of 7 tested C. sojina isolates revealed differential ability in infecting different soybean cultivars. This result may indicate the possibility of new race occurrence or pathogenic variation; this also presents evidence for prevalent FLS occurrence during humid and hot weather in Korea.

• 한국균학회지
• /
• 제19권1호
• /
• pp.74-78
• /
• 1991

콩 잎에 발생한 갈색점무늬병반에서 분리한 Corynespora sp.는 C. cassiicola로 동정되었으며 이 균을 접종 실험한 결과 콩에 병원성을 나타내었다. 이 균의 생장적온은 $27^{\circ}C$였으며 $19^{\circ}C$와 $35^{\circ}C$에서는 균총생장이 저조하였다. 포자형성은 potato dextrose malt agar에서 매우 양호하였으며 V-8 juice agar와 potato dextrose agar에서는 중간정도였다. C. cassiicola에 대한 콩 품종의 감수성 정도를 비교하였던바 공시한 9개 품종 중 황금 콩이 저항성을 나타내었고 기타 품종은 저항성 및 감수성을 나타내었다.

• 한국식물병리학회지
• /
• 제3권4호
• /
• pp.245-251
• /
• 1987

콩씨스트 선충 Race 3와 Race 4를 혼합하여 대두품종에 접종한 결과, 감수성품종인 'Lee'에서 혼합 Race의 암컷의 성숙은 각각의 Race의 암컷 성숙능력과 비교해 볼 때 유의차가 없는 것으로 나타났다. 그러나 Race 4에만 감수성인 대두품종 'Pickett'과 'Mack'에서는 혼합 Race. 접종시에 Race 4 단독에 의한 것보다 암컷의 성숙비율이 현저히 낮았다. 콩시스트 선충의 모든 Race에 감수성인 디두품종 'Lee'와 'Bragg'에서는 혼합 Race의 Race 4비율이 감소하였으며, Race 4에만 감수성인 'Pickett'과 'Peking'에서는 Race 4의 비율이 증가하였다. 또한 Race 3와 Race 4를 여러비율로 대두품종 'Lee'에서 증식하여도 Race 4의 비율이 감소되어 Race 3이 Race 4보다 더 큰 경합력을 지닌 것으로 생각된다.

• 한국육종학회지
• /
• 제43권3호
• /
• pp.177-179
• /
• 2011

'대왕'은 대립이며 종자 특성이 우수한 GWS91을 모본으로 하고 '석량풋콩'을 부본으로 1996년도에 인공교배를 하고 1997년부터 1998년까지 $F_1-F_2$ 양성하였다. 1999년부터 2001년도에 $F_3-F_5$ 세대를 계통육종법으로 선발한 GSL96202-2B-1-3-7계통으로 계통명은 '강원106호'이다. 주요 특성은 다음과 같다. 1. 유한신육형이며 꽃색은 자색이고 엽형은 난형이다. 입형은 구형이고 종피색은 황색, 제색은 황색이며 100립중은 33.6g으로 대립이다. 2. 개화기는 7월 27일, 성숙기는 10월 20일로 '태광콩'에 비하여 만생종이다. 3. 종실 성분중 조단백질 함량은 38.3%로 조단백질 함량에서 '태광콩'보다 다소 많았으며, 조지방 함량은 17.1%로 다소 낮았다. 기능성 성분중 아이소플라본 함량이 $1,851{\mu}g/g$로 다소 높았다. 4. 수량성은 2004년부터 2007년까지 4개년간 실시한 지역 적응시험결과 강원도 4개소 평균수량은 2.68 MT/ha로 '태광콩' 2.56 MT/ha보다 약 4% 증수하였다.

• 한국육종학회지
• /
• 제42권6호
• /
• pp.684-689
• /
• 2010

풋콩용 신품종 '상원'은 1997년 황색 대립이고 극조숙인 큰올콩을 모본으로 하고 일본에서 도입된 Oshimamidori가 교배된 조합이다. 1998년부터 2002년도에 걸쳐 $F_1\;-\;F_5$세대를 계통육종법으로 전개하여 풋콩 특성이 유망하여 선발된 YS1309- 2B-4-1-1 계통으로 생산력검정시험에서 수확시기가 빠르고 도복에 강한 대립 풋콩 다수성 계통으로 유망하여 선발된 밀양154호이다. '상원'의 그 주요특성은 다음과 같다. 1. 유한신육형이며 꽃은 백색이고 잎은 환형이며 모용은 회색이다. 풋꼬투리 색은 연한 녹색이며 성숙한 종피는 황색을 띠며 종자의 배꼽은 갈색이며 성숙 종자모양은 구형이다 2. 경장은 45 cm이며 개화기는 극조숙인 화엄풋콩보다 1일 늦은 6월 23일이며 풋꼬투리 수확기는 8월 5일로 같았다. 3. 도복, 내습성과 콩나방 피해율은 화엄풋콩과 비슷하다. SMV 저항성은 포장에서 비교적 강하였으나 유묘검정에서는 3개 strain에 모자이크 증상을 보였다. 4. 화엄풋콩보다 협장, 협폭 및 협 두께가 작았으며, 풋콩 100립중은 69.5g으로 3.1g 더 가벼웠다. 500g 풋꼬투리수는 173개이며 2-3협의 비율은 79.1%로 높다. 5. 풋콩의 조단백질 함량은 44.0%이고 조지방 함량은 14.8%이며 당함량은 화엄풋콩보다 낮았다. 6. 수량성은 전국 6개소에서 3개년간 실시한 지역적응시험 결과, 풋꼬투리 수량은 화엄풋콩보다 5% 증수한 ha당 10.39톤이었다.

• Food Science and Biotechnology
• /
• 제15권1호
• /
• pp.24-27
• /
• 2006

A simple HPLC quantification method was developed for genistein, genistin, daidzein, and daidzin in soybeans and soybean products. The procedure used a $4.6{\times}100\;mm$ $Chromolith^{(R)}$ RP-18e column with a mobile phase of 1% HOAc in 20% MeOH to 1% HOAc in 80% MeOH for 10 min. The injection volume was $2\;{\mu}L$ at a flow rate of 2 mL/min. Detection was carried out under UV at 254 nm. Under these conditions, the major isoflavones daidzein, daidzin, genistein, and genistin in soybean and soybean pastes were eluted within 7 min with baseline separation. Optimal extraction of the above four major isoflavones was achieved when 40 g of soybean or soybean paste was refluxed in 100 mL of 95% ethanol for 2 hr. Ten different soybean cultivars and nine commercial soybean pastes were analyzed by this method. The total isoflavone content was highest in the cultivar Somyung ($2,497\;{\mu}g/g$ dry weight). The isoflavone content in soybean pastes varied widely from manufacturer to manufacturer (an almost five-fold difference between the highest and lowest values). Such variations were presumably due to differences in fermentation conditions, type of soybeans used, and levels of such additives as starch and salt.

• The Plant Pathology Journal
• /
• 제39권6호
• /
• pp.575-583
• /
• 2023

Fusarium root rot is an increasingly severe problem in soybean cultivation. Although several Fusarium species have been reported to infect soybean roots in Heilongjiang province, their frequency and aggressiveness have not been systematically quantified in the region. This study aimed to investigate the diversity and distribution of Fusarium species that cause soybean root rot in Heilongjiang province over two years. A total of 485 isolates belonging to nine Fusarium species were identified, with F. oxysporum and F. solani being the most prevalent. Pot experiments were conducted to examine the relative aggressiveness of different Fusarium species on soybean roots, revealing that F. oxysporum and F. solani were the most aggressive pathogens, causing the most severe root rot symptoms. The study also assessed the susceptibility of different soybean cultivars to Fusarium root rot caused by F. oxysporum and F. solani. The results indicated that the soybean cultivar DN51 exhibited the most resistance to both pathogens, indicating that it may possess genetic traits that make it less susceptible to Fusarium root rot. These findings provide valuable insights into the diversity and distribution of Fusarium species that cause soybean root rot and could facilitate the development of effective management strategies for this disease.

• The Plant Pathology Journal
• /
• 제28권1호
• /
• pp.55-59
• /
• 2012

Northern stem canker caused by $Diaporthe$ $phaseolorum$ var. $caulivora$ ($Dpc$) has become a serious disease in soybean. The objectives of this study were to survey the existence of $Dpc$ on soybean in Korea, and to examine the potential pathogenicity of $Dpc$ in seed decay. One such isolate, SSLP-4, isolated from a field-grown plant of the Korean soybean cultivar Danbaekkong, was identified as $Dpc$, based on its morphological and molecular characteristics by sequences of internal transcribed spacer (ITS), translation elongation factor (TEF) 1-${\alpha}$ and ${\beta}$-tubulin regions, as well as pathogenic analyses. Moreover, morphological and molecular analyses revealed that isolate SSLP-4 was nearly identical to $Dpc$ strains from the United States. Pathogenicity tests on hypocotyls of soybean seedlings and detached leaves resulted in typical symptoms of soybean northern stem canker and inoculation on plants at R5-R7 stage caused seed decay. All results suggest that the $Dpc$ strain SSLP-4 can cause both stem canker and seed decay on soybean. Thus, the SSLP-4 isolate has the potential to contribute greatly to understanding of host plant resistance mechanisms, both at vegetative and reproductive growth stages in soybean.

• 한국작물학회지
• /
• 제47권4호
• /
• pp.286-291
• /
• 2002

Seedling establishment of soybean [Glycine max (L.) Merr.] is a critical factor in production system and cultural practices. The objective of this study was to identify the components of soybean seedling developments encompassing planting dates and cultivars that respond to emergence, early growth stage and dry matter accumulation. Three soybean cultivars, Hwangkeumkong, Shinpaldalkong 2, and Pungsannamulkong, were planted at Baegsan silty loam soil. Planting date was May 13, June 3, and June 24 in 2001. Sprinkler irrigation was accompanied with 30mm after seeding for three planting dates. Soybean seedlings were sampled at the growth stages from VE to V5. Days to emergence of soybean seedlings were taken 8 at May 13 and 5 at June 24 plantings. Emergence percentage was over 90 at three planting dates. May 13 planting took 33 days and June 24 planting was 25 days for reaching V5 growth stage. Cotyledon number was decreased after V2. Significant cultivar difference was found in cotyledon dry weight until V2 which differed in seed dry weights at the planting times. Leaf and total dry weights of soybean seedlings were not differed from V1 to V3 among planting dates and cultivars. Leaf water contents were generally ranged 78 to 85%. Branch was appeared from V4. Leaf/stem ratio among cultivars was similar at five growth stages and gradually increased from 2.1 at V1 to 2.8 at V5. The results based on this experiment indicated that seedling establishment of soybean was continued from VE to V3 growth stages affecting mainly by planting date and soil moisture.