Biomedic Co.

Bucheon, South Korea

Biomedic Co.

Bucheon, South Korea
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Chang Y.,Jeju National University | Oh E.U.,Jeju National University | Lee M.S.,Jangwon Co. | Kim H.B.,Biomedic Co. | And 2 more authors.
Euphytica | Year: 2017

Based on double pseudo-testcross theory, a population of 79 F1 clones, which was derived from a crossing of two tea cultivars using a Japanese tea cultivar “Fushun” (Camellia sinensis) as female parent and a Korean tea cultivar “Kemsull” (C. sinensis) as male parent, was applied to construct a genetic linkage map with different molecular markers. Previously, 143 random amplified polymorphism DNA (RAPD) markers and 11 simple sequence repeat (SSR) loci developed from 41 decamer random primers and 60 published SSR primer pairs, respectively, were used into our mapping analysis. In the study of amplified fragment length polymorphism (AFLP), 2439 bands were generated from 27 primer combinations with an average number of 90.3 bands for each, of which 495 (20.3%) were polymorphic. The majority of those polymorphic markers segregated in accordance with Mendelian segregation ratios at p < 0.01 for 400 (80.8%) or at p < 0.05 for 382 (77.2%), of which 136 (34.0%) or 131 (34.3%) were at 3:1 segregation ratios and 264 (66.0%) or 251 (65.7%) were at 1:1 segregation ratios at p < 0.01 and p < 0.05, respectively. For developing more SSR markers, the transcriptome sequences of flowers and leaves of two parents were obtained using high throughput RNA sequencing and compared. Afterwards, 1800 potential polymorphic SSR markers were successfully developed and 296 of them were selected and experimentally validated with a subset of tea plants (including two parents and six F1 offspring), from which 75 (25.3%) were repeatably amplified and polymorphic between two parents. From that, 29 (38.7%) newly mined SSR markers were heterozygous in “Fushun” and/or “Kemsull” and showed segregant genotypes in F1 seedlings and were adoptable by JoinMap 4.0. Totally, 678 markers including 143 RAPDs, 11 public SSRs, 495 AFLPs, and 29 newly mined SSRs were conjointly used to construct a combined linkage map for tea plant. The new genetic map located 79 RAPDs, 5 public SSRs, 214 AFLPs, and 11 new SSRs developed from RNA seq technique and covered 1441.6 cM with an average distance of 4.7 cM between two adjacent markers. This map will lay a foundation for qualitative or quantitative trait loci (QTLs) analysis of important agronomic traits for tea plant in the future study. © 2017, Springer Science+Business Media B.V.


Kim Y.M.,National Forest Seed and Variety Center | Jo A.,National Forest Seed and Variety Center | Jeong J.H.,National Forest Seed and Variety Center | Kwon Y.R.,National Forest Seed and Variety Center | Kim H.B.,Biomedic Co.
Applications in Plant Sciences | Year: 2017

Premise of the study: Polymorphic microsatellite markers of Zanthoxylum schinifolium (Rutaceae), a promising medicinal plant with effective antibacterial, anticancer, and anti-inflammatory compounds, were developed and evaluated for further genetic studies based on genetic variation among individuals or populations. Methods and Results: Following the selective hybridization method, microsatellite-enrichment libraries were constructed. Using these libraries, we obtained 15 polymorphic and three monomorphic microsatellite markers for Z. schinifolium. The number of alleles observed in each of the 15 polymorphic loci ranged from two to eight, and the observed and expected heterozygosities ranged from 0.070 to 0.677 and from 0.093 to 0.688, respectively. Eleven of these developed markers were successfully amplified for Z. piperitum, a related species. Conclusions: These microsatellite markers can be valuable tools for further genetic studies of Z. schinifolium, such as genetic resource conservation for maintaining breeding material and individual identification for breeding program improvement and variety management. .


Im J.H.,Seoul National University | Lee H.,Seoul National University | Lee H.,Korea Polar Research Institute KOPRI | Kim J.,Seoul National University | And 4 more authors.
Molecules and Cells | Year: 2012

Mitogen-activated protein kinase (MAPK) is activated by various biotic and abiotic stresses. Salt stress induces two well-characterized MAPK activating signaling molecules, phosphatidic acid (PA) via phospholipase D and phospholipase C, and reactive oxygen species (ROS) via nicotinamide adenine dinucleotide phosphate (NADPH)-oxidase. In our previous study, the activity of soybean MAPK, GMK1 was strongly induced within 5 min of 300 mM NaCl treatment and this early activity was regulated by PA. In this study, we focused on the regulation of GMK1 at the later stage of the salt stress, because its activity was strongly persistent for up to 30 min. H2O2 activated GMK1 even in the presence of PA generation inhibitors, but GMK1 activity was greatly decreased in the presence of diphenyleneiodonium, an inhibitor of NADPH-oxidase after 5 min of the treatment. On the contrary, the n-butanol and neomycin reduced GMK1 activity within 5 min of the treatment. Thus, GMK1 activity may be sustained by H2O2 10 min after the treatment. Further, GMK1 was translocated into the nucleus 60 min after NaCl treatment. In the relationship between GMK1 and ROS generation, ROS generation was reduced by SB202190, a MAPK inhibitor, but was increased in protoplast overexpressing TESD-GMKK1. However, these effects were occurred at prolonged time of NaCl treatment. These data suggest that GMK1 indirectly regulates ROS generation. Taken together, we propose that soybean GMK1 is dually regulated by PA and H2O2 at a time dependant manner and translocated to the nucleus by the salt stress signal. © The Korean Society for Molecular and Cellular Biology.


Nam K.-H.,Korea Research Institute of Bioscience and Biotechnology | Kim D.-Y.,Korea Research Institute of Bioscience and Biotechnology | Shin H.J.,Korea Research Institute of Bioscience and Biotechnology | Nam K.J.,Korea Research Institute of Bioscience and Biotechnology | And 6 more authors.
Food Chemistry | Year: 2014

Comparing well-watered versus deficit conditions, we evaluated the chemical composition of grains harvested from wild-type (WT) and drought-tolerant, transgenic rice (Oryza sativa L.). The latter had been developed by inserting AtCYP78A7, which encodes a cytochrome P450 protein. Two transgenic Lines, '10B-5' and '18A-4', and the 'Hwayoung' WT were grown under a rainout shelter. After the harvested grains were polished, their levels of key components, including proximates, amino acids, fatty acids, minerals and vitamins were analysed to determine the effect of watering system and genotype. Drought treatment significantly influenced the levels of some nutritional components in both transgenic and WT grains. In particular, the amounts of lignoceric acid and copper in the WT decreased by 12.6% and 39.5%, respectively, by drought stress, whereas those of copper and potassium in the transgenics rose by 88.1-113.3% and 10.4-11.9%, respectively, under water-deficit conditions. © 2013 Elsevier Ltd. All rights reserved.


Nam K.-H.,Korea Research Institute of Bioscience and Biotechnology | Shin H.J.,Korea Research Institute of Bioscience and Biotechnology | Pack I.-S.,Korea Research Institute of Bioscience and Biotechnology | Park J.-H.,Korea Research Institute of Bioscience and Biotechnology | And 2 more authors.
Journal of the Science of Food and Agriculture | Year: 2016

BACKGROUND: Drought induces a number of physiological and biochemical responses in cereals. This study was designed to examine the metabolite changes in grains of drought-tolerant transgenic rice (Oryza sativa L.) that overexpresses AtCYP78A7 encoding cytochrome P450 protein using proton nuclear magnetic resonance (1H-NMR) and gas chromatography/mass spectrometry. RESULTS: Principal component analysis showed that the 1H-NMR-based profile was clearly separated by soil water status of well-watered and water-deficit. A discrimination of metabolites between transgenic and non-transgenic grains appeared under both watering regimes. Variations in the levels of amino acids and sugars led to the discrimination of metabolites among genotypes. In particular, drought significantly enhanced the levels of γ-aminobutyric acid (GABA, 244.6%), fructose (155.7%), glucose (211.0%), glycerol (57.2%), glycine (65.8%) and aminoethanol (192.4%) in the transgenic grains compared with the non-transgenic control grains. CONCLUSION: These changes in amounts of metabolites may assist in improving drought tolerance in transgenic rice by playing crucial roles in stress-responsive pathways including GABA biosynthesis, sucrose metabolism and antioxidant defenses. © 2016 Society of Chemical Industry.


Nam K.-H.,Korea Research Institute of Bioscience and Biotechnology | Nam K.J.,Korea Research Institute of Bioscience and Biotechnology | An J.H.,Korea Research Institute of Bioscience and Biotechnology | Jeong S.-C.,Korea Research Institute of Bioscience and Biotechnology | And 3 more authors.
Food Science and Biotechnology | Year: 2013

Nutritional composition is the main consideration in the safety assessment of foods derived from genetically modified (GM) crops. In this study, the key nutrients in drought-tolerant rice that had been generated by the insertion of AtCYP78A7 encoding cytochrome P450 protein were analyzed. Results were compared with those obtained from its non-transgenic counterpart and other commercial rice. When transgenic rice lines 10B-5 and 18A-4 were compared with the non-transgenic counterpart, no significant differences were found in their contents of proximates, amino acids, fatty acids, minerals, and vitamins. Except for fiber contents and levels of vitamin B2, most of the measured values fit within the reference ranges established for other commercial rice. These results indicate that the key nutritional composition of drought-tolerant transgenic rice is substantially equivalent to its non-transgenic counterpart. Therefore, insertion of AtCYP78A7 to improve drought tolerance does not change the constitution and quality of key nutrients in brown rice. © 2013 The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht.


Kim S.-C.,National Institute of Horticultural and Herbal Science | Kim H.B.,Biomedic Co. | Kim H.B.,Jeju National University | Joa J.-H.,Research Institute of Climate Change and Agriculture | Song K.J.,Jeju National University
Journal of Plant Biotechnology | Year: 2015

Kiwifruit is a new fruit crop that was commercialized in the late 1970s. Recently, its cultivation and consumption have increased rapidly worldwide. Kiwifruit is a dioecious, deciduous, and climbing plant having fruit with hairs and various flesh colors and a variation in ploidy level; however, the industry consists of very simple cultivars or genotypes. The need for efficient cultivar improvement together with the evolutional and biological perspectives based on unique plant characteristics, have recently encouraged genome analysis and bioinformatics application. The draft genome sequence and chloroplast genome sequence of kiwifruit were released in 2013 and 2015, respectively; and gene annotation has been in progress. Recently, transcriptome analysis has shifted from previous ESTs analysis to the RNA-seq platform for intensive exploration of controlled genetic expression and gene discovery involved in fruit ascorbic acid biosynthesis, flesh coloration, maturation, and vine bacterial canker tolerance. For improving conventional breeding efficiency, molecular marker development and genetic linkage map construction have advanced from basic approaches using RFLP, RAPD, and AFLP to the development of NGS-based SSR and SNP markers linked to agronomically important traits and the construction of highly saturated linkage maps. However, genome and transcriptome studies have been limited in Korea. In the near future, kiwifruit genome and transcriptome studies are expected to translate to the practical application of molecular breeding. © Korean Society for Plant Biotechnology.


Cho S.,Chung - Ang University | Lee D.G.,Chung - Ang University | Jung Y.-S.,Yeong Gwang Agricultural Technology Center | Kim H.B.,Biomedic Co. | And 2 more authors.
Natural Product Sciences | Year: 2016

Phytochemicals were isolated from leaves of the fiber crop, ramie (Boehmeria nivea, Bn), using open column chromatography and medium pressure liquid chromatography. Their structures were identified as β-sitosterol, (−)-loliolide, rutin, and pyrimidinedione by MS, 1H-, and 13C-NMR spectroscopic analysis. Among them, (−)-loliolide was isolated for the first time from B. nivea. A content analysis of (−)-loliolide in B. nivea collected from different regions and harvest times was conducted by HPLC. The highest content of (−)-loliolide was found in Bn-23 harvested in September. These results will be helpful to use the plant which harvest in September as a high content phytochemical additive in food, health supplements, and medicinal products. © 2016 Korean Society of Pharmacognosy. All rights reserved.


PubMed | Biomedic Co. and Korea Research Institute of Bioscience and Biotechnology
Type: | Journal: Food chemistry | Year: 2014

Comparing well-watered versus deficit conditions, we evaluated the chemical composition of grains harvested from wild-type (WT) and drought-tolerant, transgenic rice (Oryza sativa L.). The latter had been developed by inserting AtCYP78A7, which encodes a cytochrome P450 protein. Two transgenic Lines, 10B-5 and 18A-4, and the Hwayoung WT were grown under a rainout shelter. After the harvested grains were polished, their levels of key components, including proximates, amino acids, fatty acids, minerals and vitamins were analysed to determine the effect of watering system and genotype. Drought treatment significantly influenced the levels of some nutritional components in both transgenic and WT grains. In particular, the amounts of lignoceric acid and copper in the WT decreased by 12.6% and 39.5%, respectively, by drought stress, whereas those of copper and potassium in the transgenics rose by 88.1-113.3% and 10.4-11.9%, respectively, under water-deficit conditions.


PubMed | Biomedic Co. and Korea Research Institute of Bioscience and Biotechnology
Type: Journal Article | Journal: Journal of the science of food and agriculture | Year: 2016

Drought induces a number of physiological and biochemical responses in cereals. This study was designed to examine the metabolite changes in grains of drought-tolerant transgenic rice (Oryza sativa L.) that overexpresses AtCYP78A7 encoding cytochrome P450 protein using proton nuclear magnetic resonance ((1)H-NMR) and gas chromatography/mass spectrometry.Principal component analysis showed that the (1)H-NMR-based profile was clearly separated by soil water status of well-watered and water-deficit. A discrimination of metabolites between transgenic and non-transgenic grains appeared under both watering regimes. Variations in the levels of amino acids and sugars led to the discrimination of metabolites among genotypes. In particular, drought significantly enhanced the levels of -aminobutyric acid (GABA, 244.6%), fructose (155.7%), glucose (211.0%), glycerol (57.2%), glycine (65.8%) and aminoethanol (192.4%) in the transgenic grains compared with the non-transgenic control grains.These changes in amounts of metabolites may assist in improving drought tolerance in transgenic rice by playing crucial roles in stress-responsive pathways including GABA biosynthesis, sucrose metabolism and antioxidant defenses.

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