• 제목/요약/키워드: breeding status

검색결과 225건 처리시간 0.025초

수도 병해충에 대한 저항성품종의 육종 (Rice Breeding for the Resistance to the Disease and Insect Pests)

  • 허문회
    • 한국응용곤충학회지
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    • 제22권2호
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    • pp.74-83
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    • 1983
  • Yield losses due to diseases and insect pests were mentioned and emphasized the efficiency of resistant cultivars in curving the yield losses and increasing chemical efficiency. Present status of resistance breeding for blast, bacterial leaf blight viruses, brown planthopper and white backed planthopper were introduced and the resistance sources for those are discussed. Breeding strategies for above items were presented. Specially for the blast resistance, discussions were made in some detail. With brief future prospects of resistance breeding in Korea, a suggestion was made for pathologists to make clear about whether the blast spores will be brought from mainland China as we see with Bph and Wbph or not.

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가야산국립공원 까막딱다구리의 번식 현황 (Breeding Status of the Black Woodpecker (Dryocopus martius) in Gayasan National Park)

  • 권영수;전세근;설정욱;김임규
    • Journal of Forest and Environmental Science
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    • 제28권4호
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    • pp.289-294
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    • 2012
  • This study was conducted from April 2012 to June 2012 to analyze breeding status of Black woodpeckers (Dryocopus martius) in the Gayasan National Park. Nest height, tree diameter which a nest built and altitude at the nest site of Black woodpeckers were 17.4 m, 63.8 cm and 587 m, respectively. A pair of Black woodpeckers completed a clutch in 4 eggs on 7 May and 3 of eggs hatched on 24 May 2012. Both female and male incubated eggs and never left eggs without one of parents. A male more contributed to build a nest than a female. Incubation duration was higher in a male than in a female. Nestlings made a begging call in a nest during the growing period. Begging frequency of nestlings increased from 11 days up to 20 days after hatching. After then, nestlings reduced begging and fledged a nest 24 days after hatching. This study provided information of breeding ecology to protect and manage population of Black woodpeckers which are endangered species in South Korea.

종계군(種鷄群)의 Newcastle Disease에 대(對)한 면역상태(免疫狀態)에 관(關)한 연구(硏究) (Immune Status of Breeding Hens Against Newcastle Disease)

  • 여상건;최원필
    • 대한수의학회지
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    • 제19권1호
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    • pp.45-51
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    • 1979
  • The present study was undertaken to observe the immune status of breeding hens and laying hens against Newcastle disease (ND). The methods of extraction of hemagglutination inhibition (HI) antibody from egg yolk, the detection of HI antibody in egg albumen and the correlation between HI antibody titers in maternal sera and egg yolks were discussed. For the purposes of these experiments, 9 flocks of breeding hens and 16 flocks of laying hens immunized against Newcastle disease virus were investigated. The vaccination program of tested flocks was 3-3-3 or 4-4-4 in general. The results obtained are summerized as follows: Freezing-thawing was the best method far antibody extraction from egg yolk for HI test. The HI antibody against NDV was found in egg albumen (geometric mean, 4.5), but lower than that found in egg yolk (32.1). The geometric mean of HI antibody titers of egg yolks (84.1) was higher than that of maternal sera (68.4) and day-old chicken sera (25.3). There was correlation between HI antibody titers of maternal sera(Y) and those of egg yolks(X). The coefficient correlation was r=0.63, and the line of regression of Y on X was $\hat{Y}$=35.91+0.35X.

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잣나무 클론 채종원에서 간벌 강도에 따른 개량효과와 유전다양성 (Genetic Gain and Diversity in a Clonal Seed Orchard of Pinus Koraiensis Under Various Thinning Intensities)

  • 오창영;한상억;김장수;강규석;이병실
    • 한국육종학회지
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    • 제40권3호
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    • pp.263-268
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    • 2008
  • 잣나무 채종원의 유전간벌을 위하여 재적생장에 대한 개량 효과와 유효클론수를 이용한 유전다양성을 평가하였다. 유전 간벌은 클론의 일반조합능력으로 나타나는 육종가(breeding value), 암꽃과 수꽃 개화량을 이용한 종자생산 기여도, 클론별 ramet수 등를 이용한 클론별 변이를 기초로 하였다. 차대 검정 결과에 의하여 산출된 재적생장에 대한 클론별 일반조합능력(genetic value) 및 1991년부터 2003년까지 조사된 개화량 성적을 이용하여 잣나무 채종원(1981년 조성) 179클론에 대하여 간벌 강도에 따른 유전다양성 및 개량효과를 분석하였다. 이때 채종원 외부로부터의 화분오염율은 30%(gene migration = 15%)로 설정하였다. 그 결과 재적생장에 대한 개량효과는 간벌율이 10%에서 60%까지 높아짐에 따라서 점차 증가하였다. 하지만 이보다 더 높은 간벌 강도에서 현저한 개량효과 증가는 나타나지 않았다. 유효클론수는 간벌강도 10%에서 60% 사이에서는 40클론으로 나타났으며, 70% 간벌율 이상에서는 증가하거나 감소하는 변동을 나타냈다. 따라서 본 잣나무 채종원에 대해서는 50%에서 60% 수준의 간벌 강도가 적당한 것으로 판단된다.

Current status of wheat allergy research and prospect

  • Son, Jae-Han;Yoon, Young-mi;Cheong, Young-Keun;Park, Jong-Chul;Kim, Kyong-Ho;Kim, Bo-Kyeong;Kang, Chon-Sik
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.259-259
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    • 2017
  • Wheat is one of important food crop in the world. However, wheat has some negative things that are allergen. Wheat includes four different allergen kwon as alpha-, beta- and gamma gliadin and amylase inhibitor. Recently, people are interesting to gluten free food or low gliadin food. To study about wheat allergies and research trend is important for future research like as wheat breeding and allergy reduction technology. In this study, we analyzed that the reported on the research field of wheat allergy have been reported until now, and was to provide direction for future research. The analysis of 235 episodes of major papers published from 2007 to 2016. The last 5 years from 2012, wheat allergy appears increasing number of related papers. The ratio of national papers 13% and 60% were published by the United States and other European countries, respectively. The fields of wheat allergen-related preclinical technology and wheat allergen related to genome research for discovery technology were represented high rate by 58% and 26%, respectively. In the case of Korea, significantly account genetic and breeding areas. Recently, however, the research of glutenin protein which is closely linked to wheat allergy is in progress. So, we expected to increase wheat allergy of the research is in the future in Korea.

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주요 가축들의 유용유전자 및 질병관련 유전자 연구현황 (Current Research Status for Economically Important and Disease Related Genes in Major Livestock Species)

  • 이준헌;박찬규
    • Journal of Animal Science and Technology
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    • 제47권3호
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    • pp.325-340
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    • 2005
  • Great success has been being achieved in identification and utilization of candidate genes affecting economically important as well as disease related traits in animals for the past two decades. This article reviews the current status of candidate genes in animals, with particular emphasis on the disease causing genes in livestock. Two different types of phenotypes, monogenic and polygenic, are also described. Finally, commercialized animal DNA markers, which can be used for the molecular breeding in near future, are discussed.

동물복지 관점에서의 한국 사육곰 구호정책 개선방안 (Improvement Disciplines for Relief Policy of Breeding Bears at the Perspective of Animal Welfare in the Republic of Korea)

  • 이정환;이관규;이민주;차진열
    • 한국환경복원기술학회지
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    • 제16권6호
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    • pp.31-48
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    • 2013
  • South Korea had encouraged farmers to breed bear to increase farmer's income since 1981. Currently farmers breed over thousand number of bears, however but the policy measures for breeding bears is expected to conflict the main stream of bear conservation due to South Korea belong to the member of CITES, which categorizes and manages bears under Wild Fauna and Flora Protection Act. Government needs to establish a special law containg the win-win relief strategy not only for farmers of breeding bears, but international corresponding policy. So, we have reviewed the domestic status and international trends on breeding bears, and suggest the alternative strategies of the policy such as a bear park, a bear village, use of species recovery center, use of a preservation organization. This policy should be accompanied with more detailed fact analysis, management agency, well equipped welfare facility and financial preparation for proper management of breeding bears against changing international trends on wildlife conservation.