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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
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Volume & Issues
Volume 54, Issue 4 - Dec 2009
Volume 54, Issue 3 - Sep 2009
Volume 54, Issue 2 - Jun 2009
Volume 54, Issue sup1 - Apr 2009
Volume 54, Issue 1 - Mar 2009
Selecting the target year
Bio-Degradable Plastic Mulching in Sweetpotato Cultivation
Lee, Joon-Seol ; Jeong, Kwang-Ho ; Kim, Hag-Sin ; Kim, Jeong-Ju ; Song, Yeon-Sang ; Bang, Jin-Ki ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 135~142
This experiment was conducted to determine the usability of biodegradable plastic in the mulching cultivation of sweetpotato. For this, we investigated the physical characteristics, biodegradability, leaching, yield, workability, etc. of biodegradable films. Compared with general mulching materials, biodegradable Poly butyleneadipate-co-butylene succinate (PBSA) and PLC+starch showed
% higher tensile strength, but
% lower elongation and
% lower tear strength. In the leaching test on the biodegradable films, heavy metals were detected very little or not at all. As to difference in ground temperature according to mulching material, the temperature was high in order of PLC+starch > PBSA > Low Density Polyethylene (LDPE) > Control during the period from late June to mid July, but in order of LDPE > PLC+starch > PBSA > None during the period from late July to late September. In the mulching cultivation of sweet potato, biodegradable films PBSA (EA, EB, EC) and PLC+starch (DD, DE, DF) began to degrade after 60 days from the cut planting of sweet potato, and over 95% degraded after 120 days. The quantity of roots was 3,070 kg/10a for PBSA, 3,093 kg/10a for PLC-starch, and 2,946 kg/l10a for LDPE, showing no significant difference according to mulching material. Considering the physical characteristics, biodegradability, environment, convenience in harvesting work, yield, etc. of the films in the mulching cultivation of sweet potato, biodegradable films are expected to be very useful.
Soybean Ecological Response and Seed Quality According to Altitude and Seeding Dates
Shin, Sang-Ouk ; Shin, Seong-Hyu ; Ha, Tae-Jeong ; Lim, Sea-Gyu ; Choi, Kyung-Jin ; Baek, In-Youl ; Lee, Sang-Chul ; Park, Keum-Yong ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 143~158
This experiment was carried out to examine ecological response and soybean quality as affected by environmental cultivation for producing high seed quality in domestic soybean variety. The results are as follows: Under equal cumulative temperature condition, soybean plants grown in Muju showed longer days to flowering, which was an effect of the long day-length on high latitudes, and longer duration of reproductive stage as a result of low temperature within that period. Considering apparent seed quality, 100 seed weight of soybeans grown in Muju was heavier than Miryang. Ratio of seed crack and disease-damaged seeds was lower in Muju, and these parameters decreases as planting was delayed. The protein contents did not show significant difference in terms of altitude and planting date, however, crude oil contents were higher in Miryang. An opposite trend was observed in C18:1 and C18:3. In the fatty acid composition, the proportion of C18:1 decreased as seeding date was delayed, and was higher in Miryang. Opposite observations were obtained from C18:3. The anthocyanin contents were highest on June 10 planting and higher in Muju than in Miryang. Isoflavone content was higher as seeding date was delayed and is similar accross seeding dates in Muju. As a summary, for high seed quality production the optimum planting date was June 10, and Muju was more suitable region than Miryang.
Difference of the Ginsenosides Contents According to the Planting Location in Panax ginseng C. A. Meyer
Li, Xiangguo ; Nam, Ki-Yeul ; Choi, Jae-Eul ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 159~164
The difference of ginsenosides content according to placement of ginseng planting (line) under shading net in 5-year-old ginseng roots were examined. The total saponin (
, Rc, Rd, Re, and
) contents were 15.01 mg/g and 21.79 mg/g in the main roots, 35.93 mg/g and 43.32 mg/g in the lateral roots, 87.85 mg/g and 105.51 mg/g in the fine roots for the front
lines in Yunpoong and Landrace variety (purple-stem variant), respectively. In the middle
lines the total saponin contents were 18.73 mg/g and 23.19 mg/g in the main roots, 44.92 mg/g and 43.50 mg/g in the lateral roots, 92.97 mg/g and 110.70 mg/g in the fine roots in Yunpoong and Landrace variety, respectively. In the rear
lines the total saponin contents were 21.88 mg/g and 26.68 mg/g in the main roots, 38.41 mg/g and 44.89 mg/g in the lateral roots, 101.03 mg/g and 107.06 mg/g in the fine roots in Yunpoong and Landrace variety, respectively. The differences in total and individual ginsenosides content in the main, lateral and fine roots among the lines were not significant but total ginsenosides contents in the main roots were different in case of Yunpoong variety. The ratios of protopanaxadiol (PD) type saponin to protopanaxatriol (PT) type saponin in roots were lower in the front lines compared to the middle and rear lines and the ratios were significantly different among the parts of roots.
QTL Analysis of Protein Content in Double-haploid Lines of Rice
Qin, Yang ; Kim, Suk-Man ; Sohn, Jae-Keun ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 165~171
The objective of this study was to characterize the main-effect QTLs, epistatic QTLs and QTL-by-environment interactions (QE), which are involved in the control of protein content. A population of 120 doubled haploid (DH) lines derived from a cross between 'Samgang' and 'Nagdong', was planted and determined for protein content over three years. Based on the population and a genetic linkage map of 172 markers, QTL analysis was conducted by WinQTLcart 2.5 and QTLMAPPER. Three main-effect QTLs affecting protein content of brown rice were detected from 2004 to 2006 on chromosomes 1 and 11. The qPC11.2 was repeatedly detected across two years. Seven pairs of epistatic loci were identified on eight chromosomes for protein content and collectively explained 39.15% of phenotype variation. These results suggest that epistatic effects might be an even more important component of the genetic basis for protein content and that the segregation of the DH lines for protein content could be largely explained by a few main-effect QTLs and many epistatic loci.
Waxy Rice Variety-dependent Variations in Physicochemical Characteristics of Sogokju, a Korean Traditional Rice Wine
Lee, Jin-Seok ; Woo, Koan-Sik ; Chun, Ar-Eum ; Na, Jang-Yeon ; Kim, Kee-Jong ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 172~180
This study was carried out to compare the physicochemical characteristics and sensory quality of Sogokju (Korean traditional rice wine) prepared with waxy rice varieties. Among tested waxy rice varieties, highest protein contents (8.11%) was observed in cv. Sangjuchal, and highest whiteness and L-value were observed in cv. Hwaseonchal, while no significant differences in gelatinization temperature could be observed among tested varieties, and cv. Boseokchal and Sinseonchal exhibited higher breakdown viscosity compared to the others. The alcohol contents of Sogokju with waxy rice varieties ranges from 13.0 to 13.4%, and the brix degree and turbidity were within the range of 20.5 to 24.6
, and 0.0344 to 0.0530, respectively. The highest L-value (6.90), b-value (l.45), pH (4.79), total acidity (0.8384%), and glucose content (10.843 g/100 ml) could be observed in Sogokju made with cv. Sangjuchal. The organic acids such as succinic acid, malic acid, citric acid and oxalic acid could be detected in Sogokju. Although no variety-dependant differences in appearance, aroma, and taste could be found in sensory evaluation, Sogokju made with cvs. Sinseonchal, Haepyeongchal, and Hwaseonchal showed higher overall quality than Sogokju made with cv. Dongjinchal, which is most widely used for Sogokju used for Sogokju production nowadays.
Allelic Variation of Glutenin, Granule-Bound Starch Synthase l and Puroindoline in Korean Wheat Cultivar
Park, Chul-Soo ; Pena, Roberto J. ; Baik, Byung-Kee ; Kang, Chon-Sik ; Heo, Hwa-Young ; Cheong, Young-Keun ; Woo, Sun-Hee ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 181~191
To investigate the genetic variation of high-and low-molecular-weight glutenin subunits (BMW-GS and LMW-GS), granule-bound starch synthase I (GBSSI) and puroindoline in 24 Korean wheat cultivars. At the BMW-GS compositions, three Glu-A1 alleles, five Glu-B1 alleles and three Glu-D1 alleles were identified. The high frequency of alleles at each locus was Glu-A1c allele (15 cultivars), Glu-B1b allele (16 cultivars) and Glu-D1f allele (16 cultivars). Four alleles were identified at the Glu-A3 and Glu-B3 loci and three at Glu-D3 locus and Glu-A3d, Glu-B3d and Glu-D3a were mainly found at each Glu-3 locus. Glu-A3d, Glu-B3d, Glu-D3b or c (4 cultivars, respectively) and Glu-A3d, Glu-B3d, Glu-D3a and Glu-A3c, Glu-B3d or h, Glu-D3a (3 cultivar, respectively) were predominantly found in Korean wheats. At the GBSS compositions, 2 waxy wheat cultivars, Shinmichal and Shinmichal1, showed null alleles on the Wx loci and other cultivars were wild type in GBSS compositions. At the puroindoline gene compositions, Korean wheat cultivars carried 3 genotypes, which 10 cultivars (41.7%) were Pina-D1a and Pinb-D1a, 11 cultivars (45.8%) had Pina-D1a and Pinb-D1b and 3 cultivars (12.5%) carried Pina-D1b and Pinb-D1a. These genetic variations could present the information to improve flour and end-use quality in Korean wheat breeding programs.
Influence of Site-specific Fertilizer Application Using GPS and Digital Fertility Map on Rice Yield and Quality
Chi, Jeong-Hyun ; Lee, Jae-Hong ; Kim, Hee-Oong ; Choi, Byoung-Rourl ; Park, Jung-Soo ; Park, Kyung-Yeol ; Jung, In-Gue ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 192~197
This study was conducted to investigate the effect of site-specific variable fertilization following digital fertility map generated from soil analysis on rice growth and yield. The site-specific application of fertilizer was implemented by using rice transplanter equipped with side dressing applicator and global positioning system (GPS). Coefficient of variation (C.V.) of soil nitrogen content was reduced after the experiment, and spatial variation of semivariogram was reduced. Rice growth from tillering to ripening stage, plant height, tiller and panicle number increased at site-specific variable fertilization treatment, and coefficient variation (C.V.) of each growth characteristics was lower than those of conventional fertilization treatment. As a result, fertility in the rice field was more uniform become of site-specific fertilizer application. Head rice yield of site-specific application plot increased by 9% (i.e., to from 450 kg/10a to 492 kg/10a of the control plot) and its CV was significantly reduced to 3.5 compared to 7.8 of the control plot. In addition, there was no significant difference in amylose, protein contents and whiteness of milled rice, but its CV was reduced.
Starch Properties of Chinese Yam, Dioscorea opposita Thunb.
Kim, Sang-Kuk ; Won, Jae-Hee ; Kang, Sang-Mo ; Lee, In-Jung ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 198~202
The starch properties of two chinese yams were evaluated in this study. Amylose content ranged 13.5% to 19.3%. The swelling power of starches varied 10.98% to 11.43%. Water binding capacity in chinese yam starches ranged 93.46% to 107.21%, high WBC was observed in Ma 1. The onset temperature (To) of two chinese yam starches ranged 62.9 to
, peak temperature (Tp) ranged 76.2 to
. The PHI(peak height index) was about 4-fold higher in Anwon cultivar than in Ma 1 cultivar. SEM revealed that starches has a presence of large oval or spherical to small irregular-shape granules. Starch granule size ranged 15.23 to 15.52
, showing a typical C-type X-ray pattern.
Spatial Variability Analysis of Rice Yield and Grain Moisture Contents
Chung, Ji-Hoon ; Lee, Ho-Jin ; Lee, Seung-Hun ; Yi, Chang-Hwan ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 203~209
Yield monitoring is one of a precision agriculture technology that is used most widely. It is spatial variability analysis of yield information that should be attained with yield monitoring system development. This experiment was conducted to evaluate spatial variability of yield and grain moisture content in rice paddy field, and their relationships to rice productivity. It is necessary to minimize sampling interval for accurate yield map making or to control cutting width of rice combine. Considering small rice plots such as
ha, optimum size of sampling plot was below 15 m more than 5 m in with and length. In variable rate treatment field, average yield was similar, but yield variation was reduced than conventional field. Gap of yield by another plot in same field was bigger than half of average yield than yield variation was significantly big. Therefore yield measuring flow sensor must be able to measure at least 300 kg/10a more than 1000 kg/10a. Variation of moisture content in same field was not big and spatial dependance did not appear greatly. But, variation between different field is appeared difference according to weather circumstance before harvesting. Change of spatial dependence of yield was not big, because of field variation of moisture content is not big.
Temporal and Spatial Characteristics in the Pollen Flow of Living Modified Rice
An, Joo-Hee ; Cho, Kang-Hyun ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 210~217
Pollen flow is one of the essential components in the ecological risk assessment of transgenic crops, because pollen can act as a vehicle to disseminate transferred alien genes. Pollen flow pattern of a cultivated rice variety and Living modified (LM) rice was studied at diurnal and distance changes under field. We measured airborne pollen density at the distances of -1, 0.5, 0, 1, 2, 3, 4, 5, 7, 9, 11 and 13 m from rice cultivation and recorded the direction and speed of wind using weather station in the conventional rice paddy field during the flowering period of rice. Diurnal changes in pollen density were observed as a peak between 10:00 to 13:00 hr. The density of airborne rice pollen geometrically decreased with the increase of distance from pollen sources. It is therefore necessary to carry out a detailed investigation of pollen flow of a particular species, where ecological risk assessment requires an accurate estimation of pollen flow including both distance and intensity of pollen dispersal. The rice pollen flow was significantly influenced by weather conditions, particularly by wind direction and speed. The precise determination of the local wind conditions at flowering time therefore appears to be of primary importance for setting up suitable isolation distance from transgenic rice in the field.
Changes of Field Establishment and Growth in Cover Crops Sown at Different Times
Lee, Ji-Hyun ; Shim, Sang-In ; Kang, Chung-Kil ; Jee, Hyeong-Jin ; Lee, Hyeon-Bok ; Lee, Byung-Mo ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 218~224
In organic fanning systems, integration of cover crops into cropping system are recommended to improve the soil quality, to prevent soil erosion, and to provide biological control of weeds. The aim of the present study was to evaluate the optimal seeding dates of major cover crops. To know optimal seeding dates, crimson clover, alfalfa, rye and hairy vetch were sown on 20. Sep., 27. Sep., 4. Oct., 11. Oct., 18. Oct., 25. Oct. Rye could germinate and grow well in all the tested sowing dates. Hence, it was concluded that the sowing of rye could be conducted later in fall or more earlier in spring than any other cover crops tested in this study. Growth and ground covering capacity were significantly decreased by late sowing in alfalfa and crimson clover. For safe overwintering, alfalfa and crimson clover should be sown before late September. Similarly, field emergence of hairy vetch was found to be sensitive to soil temperature, however, its growth and ground covering capacity after overwintering was enough to compensate the delay in sowing. Germination tests in laboratory revealed that hairy vetch grew faster at
. The result suggested that germination and growth rate of hairy vetch was rapidly decreased at low temperature. Therefore, it is recommended that hairy vetch should be sown as soon as possible in September for improving stand establishment after overwintering.
Cation and Nitrogen Contents, and Growth of Soybean against Underground Water Level at Reproductive Stage
Park, Gwan-Soo ; Ahn, Tae-Hwan ; Cho, Jin-Woong ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 225~230
This study was conducted to response the growth, seed yield, nitrogen content and different cation content of two soybean, flooding-tolerant cv. Pungsannamulkong (PNSK) and flooding-sensitive cv. Tawonkong (TWK) when these were subjected to flooding stress at R1 stage for cultivation in paddy field. Flooding, underground water levels (UWL) of 0 cm, 10 cm and 40 cm, was experimented from flowering time to harvest time. The dry matter and seed yield of soybean with UWL of 0 or 10 cm declined in comparison with UWL of 40 cm and these were more reduction in TWK than in PNSK. The amount of nitrogen uptake decreased in higher UWL and there was a high significant relationship
between nitrogen content and seed yield at flooding stress. K content of leaf and stem in soybean plants had a small change with UWL but Ca content had a decrease (leaf and stem) or increase (root). Mn and Fe content were increased at higher UWL and were more in TWK than in PNSK.
Genetic Diversity and Identification of Korean Elite Soybean Cultivars including Certified Cultivars Based on SSR Markers
Jang, Seong-Jin ; Park, Su-Jeong ; Park, Kyeong-Ho ; Song, Hang-Lin ; Cho, Yong-Gu ; Jong, Seung-Keun ; Kang, Jung-Hoon ; Kim, Hong-Sig ;
Korean Journal of Crop Science, volume 54, issue 2, 2009, Pages 231~240
A total of 26 Korean elite soybean cultivars including 21 certified cultivars was assessed to evaluate genetic diversity and to analyze relationship among them based on 15 SSR markers. Fifteen SSR markers generated a total of 201 alleles. Average number of alleles per SSR marker was 13.4 with a range from 8 to 19. Genetic diversity of 26 cultivars estimated by PIC value ranged from 0.782 to 0.931 with an average of 0.874. PIC value of Satt197 was the highest with 0.931 and Satt141 was the lowest with 0.782 among 15 SSR markers. Cluster analysis based on genetic distances classified 26 soybean cultivars into 3 clusters. Cluster I, II and III included 2, 7 and 17 cultivars, respectively. Average genetic diversity within clusters was 0.769 with a range from 0.720 to 0.799. Average genetic diversity between clusters was 0.813 with a range from 0.725 to 0.857. Genetic diversity was higher between clusters than within clusters. Genetic relationship among clusters was near between I and II, and I and III and far between II and III cluster. All of 26 Korean elite soybean cultivars could be identified by using any of 5 combinations of 2 SSR markers with higher PIC value, i.e,