• Asian-Australasian Journal of Animal Sciences
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• 제21권11호
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• pp.1535-1543
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• 2008

Microsatellites (MS) are useful for quantifying genetic variation within and between populations and for describing the evolutionary relationships of closely related populations. The main objectives of this work were to estimate genetic parameters, measure genetic distances and reconstruct phylogenetic relationships between Australian Angora/Angora_Aus/ and Cashmere/Cashmere_Aus/ populations and three Mongolian Cashmere goat (Bayandelger/BD/, Zavkhan Buural/ZB/, and Gobi Gurvan Saikhan/GGS/) populations based on variation at fourteen MS loci. The level and pattern of observed and expected heterozygosity and polymorphic information content of the fourteen loci studied across the populations were quite similar and high. Except for SRCRSP07, all studied microsatellites were in Hardy-Weinberg Equilibrium (p<0.001). Moderate genetic variation (7.5%) was found between the five goat populations with 92.5% of total genetic variation attributable to diversity existing between the individuals within each population. The greatest Nei's genetic distances were found between the Angora and four Cashmere populations (0.201-0.276) and the lowest distances were between the Mongolian Cashmere goat populations (0.026-0.031). Compared with other Cashmere goat populations, the GGS (crossbred with Russian Don Goats) population had the smallest pairwise genetic distance from the Australian Angora population (0.192). According to a three-factorial correspondence analysis (CA), the three different Mongolian Cashmere populations could hardly be distinguished from each other.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 추계학술대회
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• pp.203-203
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• 2021

• 농촌계획
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• 제19권1호
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• pp.11-21
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• 2013

The island areas have disadvantageous conditions compared to inland areas due to the characteristics which are separated, surrounded by seas, isolated. However, as the problems with separation that ultimately caused regional underdevelopment in island areas have been eased by the artificial works linking an island to land and the societal perspective on littoral districts has changed from productive view to consumptive view, the population trend in the island areas has been differentiated according to the regional conditions. But it is the reality that the population trend in the island areas has almost never been analyzed. In this regard, this study tried to analyze the overall demographic transition in eup/myon-level island areas and provide the basic data to establish flexibly and accurately regional development policies for island areas in rural As a result, as the regional conditions of island areas become more various, the potential and conditions of development have been differentiated and these trends will be more intensified. In response, the regional development policies for island areas in rural have to be reorganized actively.

• Food Science and Biotechnology
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• 제27권6호
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• pp.1865-1869
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• 2018

This study examined the effects of alfalfa seed germination on growth of Salmonella enterica. We investigated the population changes of S. enterica during early sprout development. We found that the population density of S. enterica, which was inoculated on alfalfa seeds was increased during sprout development under all experimental temperatures, whereas a significant reduction was observed when S. enterica was inoculated on fully germinated sprouts. To establish a model for predicting S. enterica growth during alfalfa sprout development, the kinetic growth data under isothermal conditions were collected and evaluated based on Baranyi model as a primary model for growth data. To elucidate the influence of temperature on S. enterica growth rates, three secondary models were compared and found that the Arrhenius-type model was more suitable than others. We believe that our model can be utilized to predict S. enterica behavior in alfalfa sprout and to conduct microbial risk assessments.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.106-106
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• 2017

The soybean [Glycine max (L.) Merr.] is one of the most important crop resources worldwide as food and forage. It is also important and valuable that to hold crop resources to have high genetic diversities. Recently, a core collection has been constructed in many plants to preserve the genetic resources of various plants. A core collection is small population to represent the genetic diversity of the total collection, and is of strategic importance as they allow the use of a small part of a germplasm collection that is representative of the total collection. Here, we developed the core collection consisting of 816 accessions by using approximately 180,000 (180K) single nucleotide polymorphisms (SNPs) developed in previous study. In addition, we performed genetic diversity and population structure analysis to construct the core collection from entire 4,392 collections. there were excluded sample call rates less than 93% and duplicated samples more than 99.9% according to genotype analysis using 180K SNPs from entire collections. Furthermore, we were also excluded natural hybrid resources which Glycine max and Glycine soja are mixed in half through population structure analysis. As a result, we are constructed the core collection of genetic diversity that reflects 99% of the entire collections, including 430 cultivated soybeans (Glycine max) and 386 wild soybeans (Glycine soja). The core collection developed in this study should be to provide useful materials for both soybean breeding programs and genome-wide association studies.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.113-116
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• 2002

The rural population has been continuously decreased since the standards of living in rural communities is relatively lower than in urban. In other words, rural area has become less attractive for settlement. The concept of 'rural amenity' was introduced, to increase interests in the development of rural area. But, there has not been proper theories and methods to evaluate the amenity. In this study, rural amenity was classified and the elements of rural amenity was evaluated using statistical methods. The results of this study could be useful to assess the effects of the polices on improving rural amenities.

• 한국지역사회생활과학회지
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• 제20권2호
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• pp.193-204
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• 2009

Although the majority of elderly are residentially stable, many western studies have recently reported that there has been a gradual growth of retirement migration. However, little is known about that in Korea. Therefore, this study intended to examine the trend and nature of elderly migration. For this purpose, inter- and intra-province migration among the aged 65 and over were analyzed, using the migration data of the Korea National Statistical Office, compiled from the 2000 and 2006 resident registration records. The results were as follows. First, there was an increase of elderly migrants to 531 thousand persons in 2006 from 383 thousand persons in 2000. Secondly, the migration rate of elderly has steadily grown with a 11.7% in 2000 and 12% in 2006. Also, the move of female among old population was active but this trend tended to decrease in 2006. Thirdly, the number of provinces which showed a positive net inter-province migration of old population increased from 7 provinces in 2000 to 8 provinces in 2006. Fourthly, we found that the destinations of elderly migrants were mostly neighboring province except the Chungnam, Jeonbuk, and Jeju. These results suggested that elderly migration would be expected to increase gradually and be important in the future of Korea.

• 한국경제지리학회지
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• 제13권3호
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• pp.487-497
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• 2010

본 연구의 목적은 도시의 소득 및 지출함수를 이용하여 우리나라 7대 광역시의 인구규모가 적정 수준에 있는 지를 분석하는 것이다. 효용극대화 가계와 이윤극대화 생산자 문제의 균형인구를 완전경쟁조건으로부터 도출한 결과, 최적인구 규모는 도시의 기술수준 및 공공서비스 수준에 의해 결정된다. 이러한 측면에서 각 도시의 인구규모 수준을 살펴보면 서울, 부산, 대구, 인천 등은 과밀한 것으로 광주, 대전, 울산 등은 과소한 것으로 나타났다.

• 농촌지도와개발
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• 제8권2호
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• pp.263-271
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• 2001

The purpose of this study were to review the current problems of rural welfare and to suggest desirable direction for development of welfare in rural Korea. Specific objectives of the study were to investigate the current status and problems of rural welfare and to search for the desirable directions for rural welfare development in Korea. The major findings of the study were as follows ; 1. Some of the current problems of rural welfare were; (1) difficulty in getting a job for stable income, (2) seriousness of medical care and aging of rural population, (3) decrease in number of rural school children and unfavorable educational environment, and (4) insufficiency in facility, manpower and program for recreation and cultural activities in rural area. 2. Problems of rural welfare were not independent in rural Korea, but the most of the problems were interrelated to each other. Integrated and comprehensive approach would be necessary to solve the problems of rural welfare. 3. Clean environment, stable and rewarding life, pride and self esteem of rural occupation should be the goals of better integrated rural welfare development, and healthfulness and quality of life should be ensured in rural society. 4. Urban oriented national policy based on urban centered political power was one of the causes of under development in rural welfare by creating rapid decrease in rural population and aging. Various problems in economic, educational, cultural and medical aspects of rural society should be solved. Further research on rural welfare should be conducted to increase and to strengthen rural welfare development in Korea.

• 농촌지도와개발
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• 제24권1호
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• pp.33-48
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• 2017

Returning to farming and rural village is one of the most hot social issues in Korea. Therefore, the government has tried to make up a policy program, which aims to support for the urban residents to get appropriate informations and to make right decisions about returning to farming and rural village. For the sparsely populated rural communities, this phenomena are some good opportunities for their sustainable development. The government needs the resasonale prospect on returning to farming and rural village, because their policy program should be made on the basis sound data and information. But, with the current data about returning to farming in Korea, it is impossible to make an econometrical model that can forecast the population who will return to farming and rural village. So, we tried a delphi method to sketch the future returning to farming and rural village. The delphi panels gave us some prospects on the issues. They anticipated that the population of returning to farming will increase for the next five years. And, they recommended some policy directions.