• Research Article

    Characterization of Heading- and Yield-related Gene Loci in the Cheongcheong/ Nagdong Doubled Haploid Line using Rice QTLs

    청청/낙동 배가반수체 집단에서 QTL을 통한 출수기와 수량관련 유전자좌 분석

    Yoon-Hee Jang, Jae-Ryoung Park, Kyung-Min Kim

    장윤희, 박재령, 김경민

    A quantitative trait loci (QTL) analysis of traits related to heading and yield was performed develop rice cultivars that are both early ... + READ MORE
    A quantitative trait loci (QTL) analysis of traits related to heading and yield was performed develop rice cultivars that are both early maturing and panicle weight type varieties. Our analysis included 120 strains of the Cheongcheong Nagdong doubled haploid (CNDH) variety. An observational growth experiment was conducted to identify genetic agronomic traits of CNDH. Heading date, ten plant weight, moisture, thousand grain weight, and yield had a normal distribution based on the frequency distribution table of the observational growth data. The QTL analysis found one heading-related and nine yield-related QTLs. The LOD of 2.85 was the largest in QTLs for heading date (QHD), 5.39 in QTLs for ten plant weight (QTPW), 3.92 in QTLs for moisture (QM), 4.80 in QTLs for thousand grain weight (QTGW), and 3.7 in QTLs for yield (QY). Genomic analysis detected 58 candidate genes on chromosome 2, 3, 7, 8, and 10. Among those, we found Rcd1 protein and OsERF3 gene in QM, MtN3 and zinc finger protein genes in QTGW, and OsNAC3 protein gene in QY. If further analysis reveals the presence of genes related to water content, thousand grain weight or yield in the CNDH stains, we can develop a selection of varieties that will be capable of coping with climate change and will contribute to global food problems. - COLLAPSE
    March 2019
  • Research Article

    Influence of Abiotic Treatments on Isoflavone Accumulation in Soybean Seeds during Germination

    물리적 요인이 콩 발아 중 isoflavone 함량에 미치는 영향

    Min-Sik Jo, Ju-Hee Lee, Mu-Hyun Ma, Seo-Young Kim, Chea-Rim Byun, Yoo-Jung Yi, Ju-Won Lee, Do-Jin Choi, Hong-Sik Kim, Yong-Ho Kim

    조민식, 이주희, 마무현, 김서영, 변채림, 이유정, 이주원, 최도진, 김홍식, 김용호

    Isoflavones, a group of secondary metabolites present in plants and especially abundant in soybeans, are garnering increasing interest because of their medicinal ... + READ MORE
    Isoflavones, a group of secondary metabolites present in plants and especially abundant in soybeans, are garnering increasing interest because of their medicinal properties. Numerous environmental factors influence isoflavone accumulation in plants. Successful attempts to increase isoflavone contents in soybean seeds have not been widely reported. In this report, we examined an effective method for producing a high amount of isoflavones during soybean seed germination, by treating the seed with 4 abiotic factors. Soybean seeds were exposed to ultrasound (50 Hz) and heat (40°C) for 30minutes, then germinated for 5 days in darkness. Another sample was subjected to water deficit during germination in darkness, and the other sample was subjected to light conditions during the germination period. The results showed that the ultrasound treatment increased isoflavone content during soybean germination. Three days after germination, the ultrasound-treated seeds presented the highest isoflavone content (6,042.1 ug/g dry weight) compared to the other treatments, which was also 1.3-fold increases over the content of the raw seed’s before germination. With respect to each type of isoflavone group, aglycone (partially genistein) content was markedly higher, whereas glucoside was lower than that of the untreated samples. In other experiment, total isoflavone content after heat, water deficit, and light treatments was 5,600.0, 4,740.1, and 5,631.4 ug/g, respectively. These present work suggests that ultrasound treatment is a novel approach for improving the production of isoflavones in soybean seeds during germination. - COLLAPSE
    March 2019
  • Research Article

    Changes in Fatty Acid Composition and Phytosterol Content During Ripening Period of the Autumn-Sown Waxy Corn

    가을재배 찰옥수수의 등숙에 따른 지방산 조성 및 Phytosterol 함량 변화

    Sun-Lim Kim, Mi-Jung Kim, Gun-Ho Jung, Jin-Seok Lee, Beom-Young Son, Jung-Tae Kim, Hwan-Hee Bae, Young-Sam Go4, and Seong-Bum Baek

    김선림, 김미정, 정건호, 이진석, 손범영, 김정태, 배환희, 고영삼, 백성범

    This study was carried out to investigate the changes in fatty acid composition and phytosterol content of the autumn sowing waxy corn ... + READ MORE
    This study was carried out to investigate the changes in fatty acid composition and phytosterol content of the autumn sowing waxy corn during its ripening period for the production of high quality and value-added fresh ears. The content of crude oil in the waxy corn kernels steadily increased with days after pollination(DAP); the crude oil content in Heukjinjuchal (HC) was higher than that in Ilmichal (IC). The composition of fatty acids according to DAP showed a statistically significant change; palmitic and linoleic acid composition gradually decreased, but oleic acid increased, and the composition of unsaturated fatty acids in HC was higher than that in IC. The phytosterol content was increased until 33 DAP, and was 937.7 mg/100g and 867.9 mg/100g in IC and HC, respectively, but there was no statistically significant difference between the varieties. The phytosterol contents in IC varied in the following order: β-sitosterol > stigmasterol > campesterol, but that in HC varied in the order β-sitosterol > campesterol > stigmasterol. The campesterol content did not show significant differences between the varieties, but the stigmasterol and ß-sitosterol content was significantly higher in HC than in IC. Palmitic, linolieic, and linolenic acid were significantly correlated with campesterol and β-sitosterol, and stearic acid was positively correlated with stigmasterol. Oleic acid was positively correlated with campesterol and β-sitosterol but negatively correlated with stigmasterol. As a result, it was suggested that fatty acids may affect the variation in phytosterol contents during the ripening period in waxy corn. - COLLAPSE
    March 2019
  • Research Article

    Effects of Planting Density on Growth and Yield in Wide-Row Drill Seeding of Proso millet (Panicum miliaceum L.)

    넓은이랑 줄뿌림 파종 시 재식밀도에 따른 기장의 생육 및 수량

    Ki-Youl Jung, Young-Dae Choi, Hyen-Chung Chun, Sang-Hun Lee, Seung-Ho Jeon

    정기열, 최영대, 전현정, 이상훈, 전승호

    The goal of this study was to investigate how the characteristics of growth and yield are affected by various planting densities in ... + READ MORE
    The goal of this study was to investigate how the characteristics of growth and yield are affected by various planting densities in wide-row drill seeding cultivation suitable for mechanized harvesting. Two cultivars (‘Hwanggeum’ and ‘Leebackchal’) of proso millet (Panicum miliaceum L.) were planted at varying planting densities [row spacing (20, 30, and 50 cm) and plant spacing (3, 5, 10, and 15 cm)]. The culm length was highest at the planting density of 50×3 cm and 50×5 cm for ‘Hwanggeum’ and 20×3 cm for ‘Leebackchal’. The culm diameter became thinner as the planting density increased. The number of tillering and panicle length showed the same tendency to increase in quantity or length as planting density decreased and was highest at 50×15 cm when the planting density was lowest. The number of seeds per individual increased as planting density decreased. The thousand grain weight showed no significant differences among treatment plots. The greatest yield of ‘Hwanggeum’ was obtained at a planting density of 50×3 cm (314.9 kg·10 a-1) and that of ‘Leebackchal’ was obtained at 50×3 cm and 50×5 cm (358–356 kg·10 a-1). - COLLAPSE
    March 2019
  • Research Article

    Effect of Planting Density on Growth and Yield Components of the Sweet Sorghum Cultivar, ‘Chorong’

    재식밀도가 ‘초롱’ 단수수의 생육 및 수량구성요소에 미치는 영향

    Young Min Choi, Hyun-Ah Han, So-Hee Shin, Byong Soo Heo, Kyu-Hwan Choi, Suk-Ju Kwon

    최영민, 한현아, 신소희, 허병수, 최규환, 권석주

    This study was conducted to investigate the effect of planting density on plant growth, yield, and quality in the sweet sorghum cultivar ... + READ MORE
    This study was conducted to investigate the effect of planting density on plant growth, yield, and quality in the sweet sorghum cultivar ‘Chorong’ (Sorghum bicolor (L.) Moench). Plants were cultivated at densities of 16.7, 11.1, 8.3, 6.7, and 5.6 plants·m-2. Factors related to yield and yield components were analyzed using correlation and multivariate analyses. There was no significant difference among plant densities in stem length from 20 to 110 days after sowing. But the stem diameter was thin, and a decrease in number of tillers occurred more rapidly as planting density increased. At harvest, juice and sugar yield were higher at densities of 16.7 (42.9, 4.16 Mg·ha-1, respectively) and 11.1 (37.1, 3.73 Mg·ha-1) plants·m-2 than at 8.3 (30.5, 2.96 Mg·ha-1), 6.7 (26.6, 2.41 Mg·ha-1), and 5.6 (24.7, 2.22 Mg·ha-1) plants·m-2. The soluble solids and total sugar contents were not different among treatments, but relatively high values were observed at the density of 11.1 and 8.3 plants·m-2. As plant density was increased from 5.6 to 11.1 plants·m-2, the lodging index (1 = no, 9 = lodging) increased rapidly from 2.00 to 6.33. To determine the optimal planting density, the number of typhoons and topographical characteristics should be considered. Correlation and principal components analyses revealed that plant density exhibited a positive relationship with fresh stem yield (r = 0.62**), dry stem yield (r = 0.58**), juice (r = 0.63**), and sugar yield (r = 0.66**), but a negative with stem diameter (r = -0.65**). The yield factors were not statistically related to stem height, diameter, and number of nodes. - COLLAPSE
    March 2019
  • Research Article

    Growth and Physiological Characteristics in a Halophyte Suaeda glauca under Different NaCl Concentrations

    염생식물 나문재의 염농도에 따른 생장 및 생리적 특성

    Ji-Young Kim, Phil-Mo Seong, Deog-Bae Lee, Nam-Jin Chung

    김지영, 성필모, 이덕배, 정남진

    This research was carried out to investigate the plant growth, inorganic ion and amino acid content characteristics in a halophyte, Suaeda glauca ... + READ MORE
    This research was carried out to investigate the plant growth, inorganic ion and amino acid content characteristics in a halophyte, Suaeda glauca, under different NaCl concentrations for cultivating in the reclaimed land. S. glauca was hydroponically cultivated under 0, 50, 100, 200, 300 and 400 mM NaCl concentrations with Hogland’s nutrient solution. To evaluate growth response under different NaCl concentrations, plant height and number of branches, dry weight, Fv/Fm value, and photosynthetic efficiency were investigated. To find out physiological characteristic, inorganic ion contents and amino acids in the plant were evaluated. The optimum concentration of NaCl for plant growth were 50 mM. The plant growth were gradually decreased in the concentration ranged from 100 to 400 mM. As increasing of NaCl concentration, Na ion was increased, but K, Ca, Mg ions were decreased in the plant. The amino acid contents were varied due to NaCl concentrations, but most of amino acids content in total plant was the lowest at 50 mM. Conversely, proline was exceptionally high at 50 mM of NaCl concentration. The Fv/Fm value was the highest at 50 mM of NaCl concentration. From these results, the optimum salt concentration for the growth of S. glauca was 50 mM, but the plant seems to adapt in a variety of salt environments in view of the change of ions and amino acids depending on salt concentration and the maintenance of photosynthetic efficiency even under high salt condition. - COLLAPSE
    March 2019
  • Research Article

    Manufacturing Fermented Rapeseed Meal Compost using Two Microbial Agents and the Effect of Their Application

    유용 미생물 제제 이용 발효 유채박 비료 제조 및 시용 효과

    Ji-Eun Lee, Won Park2, Kwang-Soo Kim, Yong-Hwa Lee, Da-Eun Kwon, Youn-Ho Moon, Young-Lok Cha, Yong-Ku Kang

    이지은, 박원, 김광수, 이영화, 권다은, 문윤호, 차영록, 강용구

    Rapeseed meal, which is a byproduct of rapeseed oil extraction, improves crop productivity by supplying nutrients to the soil. The present study ... + READ MORE
    Rapeseed meal, which is a byproduct of rapeseed oil extraction, improves crop productivity by supplying nutrients to the soil. The present study aimed to manufacture fermented rapeseed meal compost using two effective microbial agents and evaluate their efficiency as fertilizer. To types of fermented rapeseed meal, manufactured using either a bio-carrier or microbial agent, showed no differences in pH, electrical conductivity (EC), and total nitrogen content. However, the contents of NH4-N and NO3-N as inorganic nitrogen were increased by 5.6 times and 1.5 times, respectively, after 5 d of fermentation. Rapeseed meal fermented for 5 d was applied to tomato a basal fertilizer and after eight weeks, the plant height increased in all fermented rapeseed treatments compared to that in the chemical fertilizer treatment, and also the quantum yield of photosystem Ⅱ (PSⅡ) showed the same trend. The total nitrogen content of tomato leaves treated with a microbial fermented rapeseed meal was twice as high as that of that treated with a chemical fertilizer. It was confirmed that the increase in the tomato height was an effect of the rapeseed meal containing inorganic nitrogen, which can easily be absorbed by plants. From these results, it is considered that fermented rapeseed meal manufactured with an effective microbial agent for 5 d showed the highest inorganic nutrient content and greatest growth enhancement in tomato. - COLLAPSE
    March 2019