• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.514-520
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• 2019

The reduction in performance due to inbreeding (i.e. inbreeding depression) has long been documented in plant and animal populations. The population of Korean native pigs are small and this breed is valuable in Korea.. This study was aimed to investigate effects of inbreeding depression on total number of piglets born (TNB) and number of piglets born alive (NBA) in Korean native pigs. We used 2,806 pedigree and 303 sows's data with 483 phenotypic records. After estimating genetic parameters for each traits, inbreeding depression was estimated using a mixed model in which the inbreeding coefficient was included as a covariate. Korean native pigs had high heritability for each traits. Inbreeding coefficient constantly increased from 1998 to 2017~2018 but there is no reduction for each traits in 2017~2018 in compared with those in 1998. Significant inbreeding depression was detected for TNB (p=0.03) but not for NBA (p=0.41). In addition there are significantly positive interactions between inbreeding coefficient and breeding value for both traits (p<0.05). These results suggest that Korean native pigs are still having genetic variation for TNB and NBA, which could overcome reproductive risks from inbreeding coefficient increase.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2002.11a
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• pp.89-89
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• 2002

2001년도 국내에서 실시된 가축의 수정란이식 현황을 파악하기 위하여 전국의 수의·축산분야의 대학, 국·공립 축산관련 연구소, 농업기술센터, 가축 인공수정소 및 동물병원 등의 108개 관련기관에 2001년 1월 1일부터 12월 31 일까지 소, 돼지 및 기타 동물의 수정란 생산, 이식 및 임신진단 결과에 대하여 설문서를 통하여 조사하였으며, 설문서를 작성하여 제출한 51개 기관의 자료를 분석한 결과는 다음과 같다. 가축의 수정란이식을 실시하고 있는 기관은 국림기관 4개소, 지방자치단체 10개소, 대학 11개소, 생산자단체 2개소, 개인 시술소 25개소로 전체 51개소였다. 한우 및 젖소 228두를 과배란 처리하여 회수된 난자수는 1,536개였으며, 그 중 이식가능 수정란 수는 995개로 두 당 평균 4.4개였다. 체외수정의 생산은 OPU유래 244개, 도축난소 유래 20,957개, 복제수정란 8,154개로 29,355개의 이식가능 체외수정란을 생산하였다. 한우에서 수정란이식은 체내수정란 359개, 체외수정란 2,686개, 복제수정란 713개 등 3,758개가 이식되었고, 젖소에는 체내수정란 U개, 체외수정란 120개, 복제수정란 106개 둥 294개가 이식되었다. 이식된 수정란의 상태별로는 신선수정란이 61.7%(2,500개), 동결수정란이 38.3%(1,552개) 이식되었고, 수란우의 품종별로는 한우 수정란을 한우 수란우에 1,471개, 젖소 수란우에 2,287개가 이식되었고, 젖소 수정란을 젖소 수란우 236개, 한우 수란우에 58개가 이식되었다. 수정란이식 수란우의 수태율은 임신진단이 이루어진 체내수정란이식(368 두)은 32.3%, 체외수정란이식(968두)은 40.4%, 복제수정란이식(536두)은 9.3%였다. 기타동물의 체내수정란 생산은 돼지 105두에서 1,623개, 염소 2,662두에서 1,720개, 기타 39두에서 228개의 수정란을 회순 하였으며, 돼지에서 체내수정란 695개, 체외수정란 1,200개, 복제수정란 67,750개 이식되었고, 기타동물에서 58,950개가 이식되었다.

• Journal of Embryo Transfer
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• v.20 no.3
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• pp.289-295
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• 2005

This study was performed to investigate the relationship between Heat shock protein 70 (HSP70) gene polymorphism and in vitro fertilization(IVF) embryo development in the pigs. The single strand conformation polymorphism(SSCP) genotypes from HSP70 K1, K3 and K4 PCR products were detected different patterns. In cleavage rate of oocyte fertilized in vitro, HSP70 K1-AA genotype($73.1\%$) and K1-AB genotype($62.3\%$) showed significantly higher oocyte cleavage rate than HSP70 K1-BB genotype($49.3\%$)(p<0.05). And HSP70 K3-AA genotype ($72.4\%$) and K3-AB($62.2\%$) also showed significantly higher oocyte cleavage rate than HSP70 K3-BB genotype($49.1\%$)(p<0.05). The IVF embryo development of 2-cell stage according to HSP70 genotypes of sperm and pig breeds also showed a significant difference. The number of embryos developed to 2-cell stage in Landrace(28.8) and Duroc(29.8) were significantly higher than in Yorkshire(10.9)(p<0.05). And also HSP70 K4-AB genotype group(29.6) higher than HSP70 K4-AA genotype group(10.6)(p<0.05). However, the number of embryos developed to blastocyst stage did not showed significant differences among breeds as well as HSP70 genotypes. These resrults suggest that in vitro development in porcine early embryos may be affected by HSP70 genotypes and breeds.

• Journal of Animal Science and Technology
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• v.45 no.5
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• pp.841-846
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• 2003

Landrace(L), Largewhite(Lw), Korean Native Pig(KNP) and commercial hybrid were experimented to determine holothane sensitivity, RYR gene mutation and quality profiles. In the results of halothane test, the incidence of halothane positive pigs was similar between L and Lw. But, the rate of dubious halothane positive type was higher in L than Lw. In hal-gene analysis, halothane-positive pigs(nn) were not found in any tested breed and heterotype(Nn) appeared only in one pig of L. Of the breed effect on the quality profiles, there were no differences in pH$_1$(pH at 1hr postslaughter), but pH$_{u}$(pH at 24hr postslaughter) was significantly higher in commercial hybrid and KNP than other breeds(p〈0.05). Color assessed by National Pork Producers Council(NPPC) and CIE L$^{*}$ was significantly paler in L breed than other breeds(p〈0.05). Significant differences were found in water holding capacity(WHC) and cooking loss in KNP(p〈0.05).

• KOREAN JOURNAL OF CROP SCIENCE
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• v.34 no.4
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• pp.370-377
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• 1989

Jerusalem artichoke (Helianthus tuberosus L.) as a biomass potential crop has several distinct advantages such as vigorous growth on poor land and high yield of carbohydrate. In this crop, seed dormancy has hampered the efforts of seed-propagration and to use them in breeding programs for improving jerusalem artichoke. Several seed treatments were tested to determine their effectiveness in overcoming the seed dormancy found in five collected varietes of jerusalem artichoke. The first results showed that the seed fertilities of five collected varieties ranged from 2.4％ to 14.7％ and the number of seed produced by one plant ranged from 88 to 1058. Germinability of seeds stored for 3 months at room temperature after harvest was almost 0％ and it was not improved by addition to the treatments of temperature, light and GA3, while germinability of seeds stored for 27 months at room temperature after harvest increased to 47.5％ in germination rate. But the removal and pin-pricking of seedcoat were very effective in breaking the seed dormancy, giving germination of 96.8％ and 82.3％, respectively. These results showed that the seed dormancy of jerusalem artichoke was induced by the seedcoat. Besides the treatment of seedcoat removal and seedcoat-pinpricking, the treatment of low and wet stratification was also effective in breaking the seed dormancy of jerusalem artichoke. Whole dormant seeds incubated for 70 days in low and wet condition germinated over 85％.

• Journal of Life Science
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• v.18 no.6
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• pp.770-775
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• 2008

Several studies reported quantitative trait loci (QTL) for meat quality on porcine chromosome 2. For application of the chromosomal information to pig industry through using DNA technology, single nucleotide polymorphism (SNP) markers are developed by comparative re-sequencing of polymerase chain reaction (PCR) products of 13 candidate genes. A total of 34 SNPs were identified in 11 PCR products, an average of one SNP in every 296 bp.PCR restriction fragment length polymorphism (RFLP) assays were developed for 11 SNPs and used to genotype four commercial pig populations in Korea. The SNP markers were used to map candidate genes in QTL and to clarify the relevance of SNP and quantitative traits.

• Journal of agriculture & life science
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• v.44 no.2
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• pp.29-38
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• 2010

This study looked into estimation of variance component over swine's economic traits by multiple animal model and maternal effect model using on-farm test data of total 31,455 swine of Duroc, Landrace and Yorkshire species that were born between 2000 and 2008. Heritability by estimated additive genetic effect showed higher than one by maternal genetic effect using multivariate maternal animal model in each trait examined by each breed and most heritability when considering only additive genetic effect in multiple traits animal model was estimated to be higher than one by estimated additive genetic effect in multivariate maternal animal model. In correlation between breeding value by estimated maternal genetic effect and phenotypic value using multivariate maternal animal model, rank correlation and simple correlation of breeding value and phenotypic value by maternal genetic effect also showed low positive correlation or strong negative correlation, which can be considered that if correlation with phenotype were increased properly considering maternal genetic effect in each trait by each breed, even better improvement could be promoted.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2003.10a
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• pp.131-131
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• 2003

2002년도 국내에서 실시된 가축의 수정란이식 현황을 파악하기 위하여 전국의 수의ㆍ축산분야의 대학, 국ㆍ공립 축산관련 연구소, 농업기술센터, 가축인공수정소 및 동물병원 등의 168개 관련기관에 2002년 1월 1일부터 12월 31일까지 소, 돼지 및 기타 동물의 수정란 생산, 이식 및 임신진단 결과에 대하여 설문서를 통하여 조사하였으며, 설문서를 작성하여 제출한 32개기관의 자료를 분석한 결과는 다음과 같다. 가축의 수정란이식을 실시하고 있는 기관은 국립기관 4개소, 지방자치단체 10개소, 대학 7개소, 생산자단체 3개소, 개인시술소 148개소로 전체 172개소였다. 한우 및 젖소 185두를 과배란처리하여 회수된 난자수는 1,334개였으며, 그 중 이식가능수정란수는 871개로 두당 평균 4.7개였다. 체외수정의 생산은 OPU유래 266개, 도축난소 유래 16,650개, 복제수정란 21,852개로 38,768개의 이식가능 체외수정란을 생산하였다. 한우에서 수정란이식은 체내수정란 475두, 체외수정란 7,515두, 복제수정란 257두 등 8,247 두가 이식되었고, 젖소에는 체내수정란 68두, 체외수정란 58두, 복제수정란 435두 등 294두가 이식되었다. 이식된 수정란의 상태별로는 신선수정란이 73.9% (6,511두), 동결수정란이 26.1%(2,297두) 이식되었고, 수란우의 품종별로는 한우 수정란을 한우 수란우에 690두, 젖소 수란우에 7,557두가 이식되었고, 젖소 수정란을 젖소 수란우 81두, 한우 수란우에 480두가 이식되었다. 수정란이식 수란우의 수태율은 임신진단이 이루어진 체내수정란이식은 33.8% (160/472두), 체외수정란이식은 34 7%(1,547/4,456두), 복제수정란이식은 10.5%(70/669두)였다. 소의 수정란이식두수는 2001년도에 비해 217%(8,808/4,052두)가 증가하였다. 돼지에서 체내수정란은 공란두 30두에서 505개의 이식가능수정란을 회수하였으며, 체외수정란은 351,777개를 생산하였고, 형질전환수정란을 수란돈 20두에 1,919개를 이식하였었다. 염소에서는 7두의 공란축으로부터 47개의 이식가능 수정란을 회수하였다.

• Korean Journal of Environment and Ecology
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• v.18 no.4
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• pp.415-436
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• 2004

The vascular plants species were summarized as 479 taxa: 89 families, 260 gents, 404 species, 66 varieties, 8 forms and 1 hybrid in the whole 6 surveyed areas of eastern parts of Jirisan (Georim Valley, Baengmudong Valley, Hanshin Valley, Jungsanri Valley, Sesokpyongjeon, and Chonwangbong). Based on the list of Korean endemic plants, 26 species were recorded: Athyrium excelsius (Aspidiaceae), Abies koreana (Pinaceae), Betula ermani var. saitoana (Betulaceae) etc. The special plants from the list of Ministry of Forest, the Forest Research Institute (1997) and the Ministry of Environment (2001), 15 species were recorded: Smilacina bicolor (Liliaceae), Disporum ovale (Liliaceae), Clematis chiisanensis (Ranunculaceae) etc. And 15 species of naturalized plants were recorded: Oenothera biennis (Onagraceae), Ambrosia artemisiaefolia (Asteraceae), Carduus crispus (Asteraceae), etc. Especially, the Korean endemic plants repeatedly appeared around mountain-trails and Ambrosia artemisiaefolia (Asteraceae), also, popular were distributed in the entire studied areas.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.65-65
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• 2019

비무장지대(DMZ)는 군사적 활동 외에 일반인에 의한 접근이 엄격히 통제되어 자연적으로 생물들이 보호되어 왔으며, 한반도의 거대한 동 서 생태축으로서 그 중요성이 매우 높다. 본 연구는 경기도 연천군지역의 비무장지대 및 민통선지역에 분포하는 자원식물의 현황을 파악하고 희귀식물, 한국특산식물 등 주요 유용자원식물의 보전과 관리에 기초자료를 제공하고자 실시하였다. 연구대상지에 분포하는 자원식물은 74과 168속 192종 4아종 26변종 5품종으로 총 227분류군으로 우리나라에 분포하는 관속식물 4,881(국립수목원, 2007)분류군의 4.66%로 나타났다. 각 과별 구성종의 출현비율을 살펴보면 국화과 36분류군으로 가장 다양하게 출현하였다. 연구대상지내에 분포하는 희귀식물은 쥐방울덩굴(Aristolochia contorta Bunge)로 1분류군이 확인되었으며, 한국특산식물은 키버들(Salix koriyanagi Kimura), 병꽃나무(Weigela subsessilis (Nakai) L.H.Bailey), 은사시나무(Populus tomentiglandulosa T. B. Lee)로 3분류군, 귀화식물은 단풍잎돼지풀(Ambrosia trifida L.), 족제비싸리(Amorpha fruticosa L.), 아까시나무(Robinia pseudoacacia L.) 등 등 17분류군으로 나타났다. 연구결과 전체적으로 다양한 식물종이 확인되지는 않았으며, 일부 구간에는 가시박(Sicyos angulatus L.), 돼지풀(Ambrosia artemisiifolia L.), 단풍잎돼지풀(Ambrosia trifida L.) 등 생태계교란 야생식물이 폭넓게 분포하고 있는 것을 확인할 수 있었다.