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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Volume & Issues
Volume 50, Issue 6 - Dec 2005
Volume 50, Issue 5 - Dec 2005
Volume 50, Issue spc1 - Nov 2005
Volume 50, Issue 4 - Sep 2005
Volume 50, Issue 3 - Jun 2005
Volume 50, Issue 2 - Jun 2005
Volume 50, Issue 1 - Mar 2005
Selecting the target year
Reaction of Korean Rice Varieties to New Bacterial Blight Race, K3a
Shin Mun-Sik ; Noh Tae-Hwan ; Kim Ki-Young ; Shin Seo-Ho ; Ko Jae-Kweon ; Lee Jae-Kil ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 151~155
This study was carried out to get information for diversifying of resistant genes to bacterial blight (BB) in Japonica cultivar breeding programs. TWo hundred nine rice varieties were tested for qualitive resistance to four races of BB; HB9101 isolate for race K1, HB9102 isolate for race K2, HB9103 isolate for race K3, and HB01001 isolate for race K3a. Two hundred nine rice varieties were divided into five groups according to their race reaction. Fourteen Tongil-type varieties and ninetyseven Japonica varieties showed susceptible reaction to four races; Kl, K2, K3 and K3a. Thirteen Tongil-type varieties and thirty-one Japonica varieties were resistant to only one race; K1. Nine Tongil-type varieties and one Japonica variety were resistant to two races; K1 and K2. One Tongil-type variety and twenty-eight Japonica varieties were resistant to the three races; K1, K2, and K3. Fourteen Tongil-type varieties and one Japonica variety were resistant to four races; K1, K2, K3, and K3a. A number of Tongil-type varieties showed broad spectrum resistance to four races, while a number of Japonica varieties showed broad spectrum resistance to three races; K1, K2, and K3.
Changes of Fatty Acid during Germination by Seed Pretreatment, SMP, in Tobacco
Shin Ju-Sik ; Kim Young-Sin ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 156~160
We studied the effect of SMP (solid matrix priming) treatment, seed pretreatment for germination enhancement, to tobacco seeds by measurement of germination rate and contents of fatty acid, energy source for tobacco germination. The results were as follows. In result of germination test, germinative ability was the highest in KF109 at nine day treatment and in KB108 at seven day treatment. The composition of fatty acid in tobacco seed confirmed by gas chromatography were palmitic acid, stearic acid, oleic acid+elaidic acid, linoleic acid+linolelaidic acid, and
acid. Palmitic acid, stearic acid, oleic acid and elaidic acid, and linoleic acid and linole-laidic acid were highest in KF109 at eight or nine day treatment and in KB108 at six or seven day treatment. Especially, content of oleic acid + elaidic acid, and linoleic acid+linolelaidic acid were changed largely by treatment, so these might be used for index to examine treatment effect.
Growth and Yields of Korean Soybean Cultivars in Drained-Paddy Field
Kim Yong-Wook ; Cho Joon-Hyeong ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 161~169
With various Korean domestic soybeans, growth and yields analysis were conducted to select the suitable soybean cultivars for cultivation in paddy field. Distinctive aspects of the soybean growth were observed in paddy field such as retarded growth of top plants and roots, relatively higher T/R ratio followed by overgrowth of top plant. However, growth and yields were significantly different among the cultivars showing 134kg/10a in Paldokong and 385 kg/10a in Doremikong. At V5. and R2 stage, highly positive correlations
were observed between leaf area and dry weight of top plant and/or root. T/R ratio was negatively correlated with dry weight of root
at V5 stage, while significantly correlated with leaf area
and dry weight of top plant
at R2 stage. Among the characters, only 100-seed weight was significantly correlated with yield. Considering the growth characters, 37 cultivars could be included in 3 different groups and genotypic properties such as maturity and growth habit were similar in each group. Nine cultivars in group 1 showed retarded growth from V5 to R2 stage, relatively lower T/R ratio, and good seed ripening. Average yields of the cultivers was 257kg/10a. In group 2, 12 cultivars showed higher T/R ratio due to overgrowth of top plant and lowest average yields (230 kg/l0a) due to poor seed ripening. Sixteen cultivars in group 3 grew fast from V5 to R2 stage representing late maturity traits, low T/R ratio, and good seed ripening. Average yields of the cultivars was highest among groups showing 270kg/l0a. In results, stable self-sufficiency of soybean yields could be expected by selective cultivation with high yielding cultivars ranging from 301 to 385kg/10a, such as Shinpaldalkong 2, Sohokong, Doremikong, Keumkangkong, Bukangkong, Dajangkong, and Geomjeongkong 2, or with cultivars included in group 3.
Effect of Hypoxia on Carbohydrate Metabolism in Barley Seedlings
Choi Heh Ran ; Park Myoung Ryoul ; Kim Jung Gon ; Namkoong Seung Bak ; Choi Kyeong-Gu ; Yun Song Joong ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 170~174
Barley plants growing in the wet paddy field easily encounter suboptimal oxygen concentration in the rhizosphere that causes molecular oxygen deficiency in root cells. The capacity of root cells to utilize energy sources is known to be positively related to resistance to hypoxia stress. This study was conducted to investigate effects of hypoxia on enzymes involved in the starch and sucrose metabolism. Barley seedlings at the third leaf stage were subjected to hypoxia (1 ppm dissolved oxygen) by purging the culture solution with nitrogen gas for up to seven days. The protein content was slightly decreased by hypoxia for 7 days.
activities increased significantly in the root but not in the shoot after 3 to 7 days of hypoxia.
activities were not affected significantly in both tissues. Additionally, sucrose synthase activities were affected little in both tissues by 7 days of hypoxia. The results indicate that root cells activate breakdown of polysaccharide reserves in response to an acute hypoxia to supply energy sources for fermentative glycolysis and cell wall fortification.
Varietal Difference of Seedling Establishment in Direct-Seeded Rice
Park Kwang Ho ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 175~178
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.
Response of Rice Growth under
Kim Young-Guk ; Shin Jin-Chul ; Choi Min-Gyu ; Koo Bon-Cheul ; Kim Seok-Dong ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 179~185
The effects of
enrichment on growth of rice (Oryza sativa L.) were examined. The plants were grown in growth chambers with a 12-h photoperiod and a day/night temperature of
of the seedling stage and
after the panicle initiation stage. The plants were exposed to two elevated
of 500, 700 ppm and ambient levels (350 ppm). At early growth stage of three varieties (IIpumbyeo, Chucheongbyeo, Hwaseongbyeo), the elevated
increased plant height, tiller, leaf area and dry weight. The photosynthetic rate was decreased at 24 days after treatment (DAT) compared to 11 DAT. The elevated
increased plant height and dry weight at panicle initiation stage (PIS) and heading stage (HS) of three varieties (IIpumbyeo, Chucheongbyeo, Hwaseongbyeo). The photosynthetic rate, stomatal conductance, evapotranspiration rate were decreased at the long days of treatment than that of short days. At entire stages, the elevated
increased the water use efficiency of rice plant because evapotranspiration rate was lowered at the elevated
than ambient levels.
Comparison of Amylogram Properties among Several Subspecies of Rice
Kwak Tae-Soon ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 186~190
This experiment was conducted to collect the basic information on the varietal diversity in amylogram properties of 3 different rice sub-species under tropical conditions in IRRI 2001 wet season based upon correlation and principal component analysis. The peak viscosity and breakdown property of Tongil type, i.e.; temperate Indica species showed higher similarity with Japonica type species rather than typical Indica and tropical japonica types. The amylogram properties such as final viscosity, pasting consistency and setback of Tongil type varieties were lower than those of typical Indica and tropical japonica types. The peak viscosity showed positive correlation with trough, while the breakdown showed negative correlation with setback in all tested 3 rice subspecies. The first principal component was applicable to increase the gelatinization temperature, final viscosity, pasting consistency and setback, and applicable to decrease the peak viscosity and breakdown. Varietal classification by the principal component score of each pedigree could be applied to the interpretation of the community by the scatter diagram for the amylogram properties to the different sub-species of rice at IRRI conditions.
Establishment of Artificial Screening Methods and Evaluation of Barley Germplasms for Resistance to Fusarium Head Blight
Han Ouk-Kyu ; Kim Jung-Gon ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 191~196
Fusarium head blight (FHB) is a severe disease problem that affects the quality and yield of barley grain. The evaluation of FHB resistance is difficult because environmental conditions greatly influence FHB infection and development. The objectives of this study were to: 1) establish an efficient screening method for selecting resistant barley to FHB, 2) compare FHB severity between the cut-spike method and pot-plant method for development of mass screening, and 3) estimate FHB resistance for barley germplasms. Barley cultivars and lines were evaluated for reaction to FHB in controlled-greenhouse condition. Spikes were spray-inoculated with a suspension
of Fusarium graminearum SCK-O4 strain, and then kept in a greenhouse at
relative humidity. Inoculation were employed at 3 different heading growth stages (heading date, three days after heading, and five days after heading). The inoculation was performed in 2 consecutive days in order to avoid escapes. The inoculated plants were maintained in the greenhouse at 4 different free moisture periods (1, 3, 5, and 7 days). The percentage of FHB severity was scored from 0 to 9 according to the rate of infected kernels per spike, and three spikes were evaluated per replication with 3 replicates. There were significant differences of FHB severity depending on the different free moisture periods, but not by the inoculation at different heading stages. The optimum evaluation point of FHB severity in the greenhouse condition was on the 7th day under free moisture condition after inoculation at the heading date. Infection level in cut-spike method highly correlated with that in pot-plant method. This suggested that cut-spike method is useful in evaluating of FHB resistance in barley. Six cultivars, such as Jinkwang, Buheung, Atahualpha 92, Chevron-b, Gobernadora-d, and MNBrite-c, were selected as resistant varieties to FHB. Correlation coefficient for the FHB severity evaluated by the pot-plant method between two seasons was 0.794, indicating the stability and accuracy of the screening method.
Occurrence of Viral Diseases in Barley Fields and Responses of Resistant Genes to BaYMV-Ik and BaMMV
Park Jong-Chul ; Seo Jae-Hwan ; Kim Yang-Kil ; Kim Jung-Gon ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 197~204
The major symptom such as yellowish and mosaic spots in overwintering barley were mostly caused by viruses such as Barley yellow mosaic virus (BaYMV) and Barley mild mosaic virus (BaMMV) in the nation-wide for four years. The result showed that more than
collected samples were infected by the viruses. The incidence of Ba YMV was more than
, and relatively uniformly distributed in the southern regions of barley fields in Korea. However the incidence of BaYMV in Gyeonggi Province was as low as
in the rest of regions. Occurrence of BaMMV varied depending on investigated regions such as
in Jeonbuk, Jeonnam, Gangwon and Gyeongnam, and a lower infection in Gyeongbuk, Chungnam and Gyeonggi Provinces. In this result,
of BaMMV was found to be in the southwest regions of Korea such as Jeonbuk and Jeonnam Provinces. Over all, both BaYMV and BaMMV were thought to be dominantly casual agents in overwintering barley by either solely or mixed infections. Soil-borne wheat mosaic virus(SBWMV) occurred at most
in Gyeonggi and Barley yellow dwarf virus-MAY (BYDVMAV) was found only one place in Jeonbuk, suggesting that SBWMV and BYDV-MAV were not significant diseases in Korea. Exotic genetic resources that possess different resistant genes to BaYMV and BaMMV were tested to identify the responses to the viruses occurred in Iksan. According to the ELISA results, BaYMV and BaMMV were infected in some plant materials but SBWMV was not identified. Any resistant gene was not effective to BaYMV-Ik (Insan strain) and BaMMY. Ishukushirazu (rym 3) and Chosen (rym 3), Tokushima Mochi Hadaka (rym 4y) and Hakei 1-41 (rym 5a) showed resistant response with little symptoms to BaYMY. The other five accessions possessing rym 1+5, rym 2, rym 4m, rym 5 and rym 9, respectively, were resistant to BaMMV. Various symptoms were observed in the tested plant materials such as not only yellowish and mosaic symptoms mostly but also necrotic spot, tissue necrosis, leaf stripe and leaf curling. However, it was difficult to find any relationship between resistant genes and specific symptoms.
Evaluation of Cold Tolerance-Related Traits of Recombinant Inbred Lines in Rice
Jeong Eung Gi ; Ahn Sang Nag ; Yea Jong Doo ; Baek Man Kee ; Choi Hae Chune ; Yi Gihwan ; Nam Min-Hee ; Yoon Kyung Min ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 205~211
This study was carried out to construct cold-tolerance characteristics. The RILs were developed from progenies of a cross between cold-susceptible Tongil-type rice variety, Milyang 23 and cold-tolerant Japonica rice variety, Stejaree 45 by single seed descent methods. The 175 RILs
were evaluated for cold tolerance traits by field screening under cold-water irrigation. Frequency distribution of RILs in leaf discoloration, heading delay, culm length reduction and number of spikelets reduction displayed nearly normal distributions with transgressive segregations to either side of parents, while the spikelet fertility reduction and panicle exsertion at low-temperature showed the more or less skewed continuous distribution toward the susceptible parent. Higher heritabilities over
were observed in leaf discoloration, spikelet fertility reduction, panicle exsertion, while relatively lower heritabilities less than
were observed in culm length reduction, number of spikelets reduction and grain yield reduction. Some cold-tolerance RILs were selected effectively by cold water irrigation, which are expected to be good materials in breeding program for cold tolerance.
Genetic Diversity of Glutinous Rice Collections Based on Agronomic Traits and RAPDs
Kim Guk-Hwan ; Kim Hong-Sig ; Lee Seok-Young ; Chung Bong-Hwan ; Song Beom-Heon ; Cho Yong-Gu ;
Korean Journal of Crop Science, volume 50, issue 3, 2005, Pages 212~220
One hundred eleven glutinous rice collections from seven countries were evaluated for genetic diversity based on agronomic traits and RAPD analysis. Twelve agronomic traits including yield components amy-lose content, alkali digest value were used to clarify the genetic relationships among glutinous rice collections. Glutinous rice collections were classified into 4 groups and early maturings Korean landraces and high amylose indica belonged to group I with RAPD analysis, 15 primers selected for polymorphic bands generated 117 bands and 81 bands
showed polymorphism. The number of amplified bands per primer ranged from 5 to 11, with the average number of bands of 7.8. With the similarity value of 0.78 in dendrogram derived from the cluster analysis based on RAPDs, glutinous rice collections were classified into 9 groups. Seventy-seven percent of the collections were classified into group I that is the largest one, while the others
were distributed to group Il-IX. Group I included most indica type rices and early ripening collections, while the small groups of III-IX included most of the Korean collections.