• KOREAN JOURNAL OF CROP SCIENCE
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• v.58 no.4
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• pp.336-346
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• 2013

Amaranth (Amaranthus sp. L.) is an important group of plants that includes grain, vegetable, and ornamental types. Centers of diversity for Amaranths are Central and South America, India, and South East Asia, with secondary centers of diversity in West and East Africa. The present study was performed to determine the genetic diversity and population structure of 75 amaranth accessions: 65 from South America and 10 from South Asia as controls using 14 SSR markers. Ninety-nine alleles were detected at an average of seven alleles per SSR locus. Model-based structure analysis revealed the presence of two subpopulations and 3 admixtures, which was consistent with clustering based on the genetic distance. The average major allele frequency and polymorphic information content (PIC) were 0.42 and 0.39, respectively. According to the model-based structure analysis based on genetic distance, 75 accessions (96%) were classified into two clusters, and only three accessions (4%) were admixtures. Cluster 1 had a higher allele number and PIC values than Cluster 2. Model-based structure analysis revealed the presence of two subpopulations and three admixtures in the 75 accessions. The results of this study provide effective information for future germplasm conservation and improvement programs in Amaranthus.

• Korean Journal of Medicinal Crop Science
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• v.21 no.3
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• pp.220-228
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• 2013

This study was conducted to assess the genetic diversity and population structure of 70 amaranth accessions collected from South and Southeast Asia using 14 simple sequence repeat (SSR) markers. In total, 67 alleles were detected, with an average of 4.79 per locus. Rare alleles comprised a large portion (46.3%) of the detected alleles, and 29 unique alleles associated with rice accessions were also discovered. The mean major allele frequency (MAF), genetic diversity (GD) and polymorphic information content (PIC) of the 14 SSR loci were 0.77, 0.36, and 0.34, respectively. A model-based structural analysis revealed the presence of three subpopulations. The genetic relationships revealed by the neighbor-joining tree method were fairly consistent with the structure-based membership assignments for most of the accessions. All 70 accessions showed a clear relationship to each cluster without any admixtures. We observed a relatively low extent of genetic exchange within or among amaranth species from South and Southeast Asia. The genetic diversity results could be used to identify amaranth germplasms and so facilitate their use for crop improvement.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.3
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• pp.341-350
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• 2021

This study tested the effect of the board of directors' (BOD) characteristics on the corporate performance of the Jordanian industrial and service companies listed on the Amman Stock Exchange (ASE) during the period 2015-2019. The characteristics of the BOD were measured through the following variables: MO = managerial ownership; CEODU = CEO duality; BI = board independence; GD = gender diversity; ND = nationality diversity; AE = advanced education; BM = board meetings; BSIZ = board size; CSIZ = corporate size; CA = corporate age. The corporate performance was measured by return on assets (ROA) and return on equity (ROE). The corporate size and corporate age were used as control variables. The study sample consisted of 85 industrial and service companies with 425 observations to identify the nature of the effect of the BOD characteristics on performance. This study applied time-series data (panel data), and the multiple linear regression method was used to achieve study objectives. Results showed a positive effect of the study variables on performance, while the corporate age and the education level (BOD members) have a negative effect on performance.

• Asian Journal of Innovation and Policy
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• v.12 no.3
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• pp.323-344
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• 2023

This study investigates the resilient structural characteristics of a region by assessing the impact of the financial crisis. Utilizing panel data at the prefecture level for metropolitan cities across pre-shock (2006-2008), shock (2009), and post-shock (2010-2019) periods, we calculated an employment resilience index by combining the resistance and recovery indices. The panel logit regression measures the influences of the region's industrial structure and external economic factors in response to the global financial crisis. The results revealed that the diversity index of industries contributed to the post-shock recovery bounce-back. Additionally, the presence of large firms and industrial clusters within the region positively contributed to economic resilience. The specialization and the proportion of manufacturing industries showed negative effects, suggesting that regions overly reliant on manufacturing-centered specialization might be vulnerable to external shocks. Furthermore, excessive capital outflows for market expansion were found to have a detrimental impact on regional economic recovery.

• Proceedings of the Korean Society of Crop Science Conference
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• 2020.11a
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• pp.138-138
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• 2020

• Proceedings of the Korean Society of Crop Science Conference
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• 2020.11a
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• pp.137-137
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• 2020

• Proceedings of the Korean Society of Crop Science Conference
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• 2021.04a
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• pp.119-119
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• 2021

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.110-124
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• 2011

Even though Korea has long experienced single race/ethnic demographic composition, the recent rapid change of demographic diversity will have powerful impact on the HRM(human resource management) in the future. In this research we find the influence of the diversity friendly HRM to the human resource practices using the data of WPS(Workplace Panel Survey) of Korea Labor Institute. If the training for women is high, the density of the woman increased. The performance pay is introduced, then the density of the disabled person would be increased. The foreign workforce was also increased if the company used more selection methods. But the HRM practices such as talent management, yearly-based compensation systems, and appraisal program which has a tendency to reduce diversity have no significant influence to the financial performance. This findings imply that the management team should introduce the effective HRM systems to manage diverse human resources after considering the organizational culture and business environment. This research intends to find the diversity friendly HRM practices and hope to help the efforts of the management team to find effective management methods.

• Journal of Mushroom
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• v.17 no.4
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• pp.171-178
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• 2019

Agaricus bisporus is a functional food and among the most widely cultivated mushrooms in the world. In this study, we analyzed the genetic diversity and population structure of 23 Korean and 42 foreign A. bisporus cultivars using SSR (Simple sequence repeat) markers. Genetic diversity of A. bisporus cultivars was as follows: number of alleles was approximately 13; observed and expected heterozygosity were approximately 0.59 and 0.74, respectively; and polymorphic information content value was about 0.71. A. bisporus cultivars were divided into three groups using distance-based analysis. Genetic diversity of Group 2, which consisted of cultivars from various countries, was high. In addition, model-based subpopulations were divided into two, and the genetic diversity of Pop2 (Population 2), which had many cultivars, was high. The results of this study could be used in a breeding program for A. bisporus, such as the development of new genetic resources and securing diversity.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.220-226
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• 2004

The restoration effects in two sorts of forests created and managed on the bases of ecological principles in Sihwa industrial complex and Mt. Surak respectively were evaluated in both viewpoints of species composition and diversity. Species composition of the forests created based on the ecological design was move similar to that of the natural forests compared wit h the forests constructed by applying the landscape architectural method. The increased species diversity in the ecologically created forest reflected the effect as well. Black locust plantation managed by applying the ecological principle showed move similar species composition to the surrounding natural forest than the forest left without any management. Furthermore, the former forest showed higher species diversity than the latter one. The methods, which create and manage a forest based on ecological principles, revealed several problems, such as lack of specialty of project operators and inspecting officers, construction regulations without the ecological background, absence of the endemic young trees to be introduced in diverse natural environment, etc. Preparation of guidance for ecological planting and systematic environmental education including revision of construction regulation were recommended as the measures to solve such problems.