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Toan Khac Nguyen,임진희 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.5
Chrysanthemum, which belongs to the Asteraceae family, is a fl oriculture crop with ornamental, industrial, and medicinalvalue. Chrysanthemum breeding programs have generated genetic linkage maps and identifi ed molecular markers for importanttraits. Chrysanthemum species have a complex genetic background, and several studies on Chrysanthemum specieshave been published in the last 3 decades. The Chrysanthemum genome was published by Amway Botanical R&D Center,China (online since 2017/12/07); however, the molecular breeding of Asteraceae is not well studied yet. Next-generationsequencing (NGS) technologies, genotyping-by-sequencing (GBS), and association mapping have facilitated the identifi cationof novel genetic markers. Chrysanthemum species have a very large genome and include diploid and polyploid species(such as allohexaploids) with complex hereditary features such as self-incompatibility systems and inbreeding depression. The development of NGS technologies allowed the advance of high-throughput DNA sequencing for detecting and singlenucleotide polymorphisms (SNP) in various plant species. Through NGS, a large number of SNPs detected via whole-genomesequencing can be used as markers in breeding and genetic studies. While SNP markers allow rapid analyses, contribute tothe low cost of genome-wide scans, and are sequenced by numerous effi cient platforms in diverse genetic backgrounds, GBScan be advantageous for the study of gene function, genetic variation, and heredity, specifi cally in modern plant breeding. In addition, GBS can reduce genome complexity, allowing SNP discovery and genotyping of sequences without a referencegenome. This review focuses on the tools used for genomic research and breeding in Chrysanthemum, and discusses theprocesses in SNP development and study of the evolutionary processes in Chrysanthemum species.
Tools for Cut Flower for Export: Is It a Genuine Challenge from Growers to Customers?
Toan Khac Nguyen,Youn Ok Jung,Jin Hee Lim 한국화훼학회 2020 화훼연구 Vol.28 No.4
Currently, the cut flower market seems to be an export revenue in the world trade of the flower industry. The amount of exported cut flowers is impressive with increased production in various countries, especially in Korea. In the Fourth Industrial Revolution, automatic technologies are continuing to develop agricultural effective tools in the challenge of digital innovation. Thus, the low production costs set up in the field, greenhouse, or smart farm set up, and the short time of harvest must be considered within a few months. The postharvest quality of cut flowers presents freshness and long vase life, and the tools for postharvest handling are expected to optimize these. This review highlights the most important factors improving postharvest quality of cut flowers, the potential standard applicable techniques for commercial handling outlines of cut flower vase life, and recommendations for improving postharvest handling in the flower industry.
Toan Khac Nguyen,Jin Hee Lim 한국식물생명공학회 2021 JOURNAL OF PLANT BIOTECHNOLOGY Vol.48 No.3
Since whole-genome duplication (WGD) of diploid Chrysanthemum nankingense and de novo assembly whole-genome of C. seticuspe have been obtained, they have afforded to perceive the diversity evolution and gene discovery in the improved investigation of chrysanthemum breeding. The robust tools of high-throughput identification and analysis of gene function and expression produce their vast importance in chrysanthemum genomics. However, the gigantic genome size and heterozygosity are also mentioned as the major obstacles preventing the chrysanthemum breeding practices and functional genomics analysis. Nonetheless, some of technological contemporaries provide scientific efficient and promising solutions to diminish the drawbacks and investigate the high proficient methods for generous phenotyping data obtaining and system progress in future perspectives. This review provides valuable strategies for a broad overview about the high-throughput identification, and molecular analysis of gene function and expression in chrysanthemum. We also contribute the efficient proposition about specific protocols for considering chrysanthemum genes. In further perspective, the proper high-throughput identification will continue to advance rapidly and advertise the next generation in chrysanthemum breeding.
Analysis of chrysanthemum genetic diversity by genotyping-by-sequencing
Toan Khac Nguyen,Suong Tuyet Thi Ha,임진희 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.5
Application of next-generation sequencing to very large genomes, such as chrysanthemum ( Chrysanthemum sp.), faceschallenges including repeated sequences, limited short-reads, and various contigs in massive fragments. Genotyping-bysequencing(GBS) can overcome many of these drawbacks by high-multiplexing, and potential genotyping-sequencingapproaches could have wide-ranging utilizations in chrysanthemum breeding. The study aimed to establish an approach forGBS application and to elucidate a phylogenomic structure in an individual with a large genome. We identifi ed single nucleotidepolymorphism (SNP) for SNP calling (279,189 markers) and SNP fi ltering (7758 markers) that will promote analysisof chrysanthemum population genetics. We conclude that GBS is the best approach for genotyping in chrysanthemum andcan be applied in genetic breeding in various plants.
Tools for Controlling Smart Farms: The Current Problems and Prospects in Smart Horticulture
Toan Khac Nguyen,Minjung Kwon,Jin-Hee Lim 한국화훼학회 2019 화훼연구 Vol.27 No.4
In the Fourth Industrial Revolution, digitally effective automatic tools in agriculture are being devised to produce food quickly. Therefore, it is essential to develop a deep understanding of digital technology and its features for the consideration of new relationships, arranged skills, and cultural economics to attain the best value for the consumption of agricultural products. Farmers play a crucial role in replacing traditional agricultural methods with new technologies in their fields. Experienced farmers can draw on the Internet of Things (IoT) to benefit from smart technologies, such as gateway data stores in light, humid, and pH sensors, and improve all sensor data daily in big sectors starting from their smart farms. This report focuses on the relationship between smart farms and IoT with new network knowledge and smart devices to benefit agriculture. This report hopes to support the farmers who intend to draw on the most recent advances in IoT-based smart farming against the backdrop of evolving sensors, tackling current
Toan Khac Nguyen,Jaewoong Yu,Hyung-Won Choi,인병천,임진희 한국원예학회 2018 원예과학기술지 Vol.36 No.1
Chrysanthemum is one of the most popular ornamental flowers in Korea due to its great diversity ofcolors and forms. To understand this diversity and to efficiently breed chrysanthemum varieties, agenetic diversity assessment of Korean native chrysanthemum populations using molecularmarkers is required. Genotyping-by-sequencing (GBS) is a newly developed and widely used nextgeneration sequencing (NGS) method based on the single nucleotide polymorphism (SNP) markersystem. In this study, we tested three restriction enzyme combinations (ApeKI, ApeKI/MseI, andApeKI/MspI) for GBS library construction using eight Korean native Chrysanthemum spp. accessions. Three libraries were constructed and sequenced on the Illumina NextSeq 500 platformand results were analyzed in the Stacks de novo GBS pipeline. Overall, the ApeKI/MseIcombination showed the best library quality, highest number of tags, and SNP generation potential.
Mechanical Design of Robot Head with Human-like Emotions
Nguyen Khac Toan,Le Duc Thuan,Le Bao Long,Nguyen Truong Thinh 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
One of the fields that has detonated lately dependent on the AI platform is humanoid robots. The facial expressions of robots, then again, are getting less and less attention. The design of a robot head that communicates a wide range of human-like expressions is described in this paper. The eye-eyelid, lip-jaw, and neck were the three main parts of the robot head under investigation. Mechanical structure of human head such as number of degrees of freedom, size, ability of joints, and major muscle groups to create movements in each part are determined based on anatomy. Then, facial expressions are analyzed dependent on AUs to find out reasonable control points. The mechanical structures of each part were designed to try to replicate the movement and expression as closely as expected. Additionally, proportions, sizes, distances of the designs, such as CoP-CoP, tr-n, n-sn, and so on, must closely resemble those of a human head. The robot head in this article is designed and modeled on an Asian human head. The result of the design, the head section is made up of three mechanisms connected by a shaft that runs through the entire head. Through the experimental process, the robot head can perform 6 of the basic expressions and movements like a real human head.