• 제목/요약/키워드: Sterility

검색결과 254건 처리시간 0.023초

Burley (Nicotiana tabacum L. CV Burley)종의 세포질적 웅성불임계통의 특성과 이용 (Characteristics and the Utilization of Cytoplasmic Male Sterility in Burley Tobacco ( Nicotiana tabacum L. CV Burley ))

  • 이승철;정윤화;이상하
    • 한국연초학회지
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    • 제1권1호
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    • pp.46-50
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    • 1979
  • 4種의 Burley種 細胞質的 雄性不稔系統과 稔性品種의 특성을 圃場에서 검정하였던 바, 雄性不稔系統들의 農耕的 化學的 특성이 稔性品種과 近似하여 , Fl 雜種 이용을 위한 交配母本으로 사용할 수 있을 것으로 考察된다.

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Burly(Nicotiana Tabacum L.Cv Burley)종의 세포질적 웅성불임계통을 이용한 $F_1$ 잡종 이용 (Studies on the Utilization of $F_1$ Hybrids using Cytoplasmic Sterility in Burley(Nicotiana tabacum L. Cv Burley) Tobacco.)

  • 한철수;조천준;김용연;이규상
    • 한국연초학회지
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    • 제2권1호
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    • pp.28-37
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    • 1980
  • 버어리種 담배에 있어서 細胞質的 雄性不稔系統을 利用한 F1雜種 利用 可能性을 究明하고자 MS Burley21$\times$Burley37外 20個 F1雜種을 育成하여 生産力 檢定試驗을 實施한 結果 MS L8$\times$Burley49, MS Kentucky12$\times$kentucky10等 4個의 F1雜種에서 現 栽培品種인 Burley21보다 수량은 2 ~11%, 품질은 1 ~5%의 증가를 보였다.

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포장식품의 레토르트 공정 (Retort Processing of Packaged Foods)

  • 정동화
    • 한국포장학회지
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    • 제13권2호
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    • pp.59-65
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    • 2007
  • Packaged food products often undergo retort processing, a thermal processing in a pressurized vessel called a retort, to ensure their microbiological safety or shelf-stability under normal non-refrigerated conditions of storage and distribution. Retort processing is generally aimed to accomplish commercial sterility of packaged foods with acceptable nutritional and sensorial qualities. Fundamental principles on retort processing, such as thermal resistance kinetics of target microorganism, heat penetration theory, and methods for evaluating process sterility and food quality loss, were reviewed. Factors affecting process severity, heat transfer mechanism, and heat penetration efficiency were summarized. General features of retortable packaging formats including metal cans, glass jars, and plastic packages were also briefly reviewed.

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CMS-Rf Genotype of Resistance Sources to Gray Leaf Spot in Pepper (Capsicum annuum L.)

  • Kim, Byung-Soo;Kim, Min-Jeong;Lee, Ji-Seon;Kim, Jeong-Hoon;Jun, Su-Kyung
    • The Plant Pathology Journal
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    • 제22권2호
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    • pp.115-118
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    • 2006
  • A total of 19 selections derived from 4 sources of peppers with resistance to gray leaf spot (KC43, KC47, KC220, and KC319) were tested for their nuclear genotype of the gene conferring the ability to restore the cytoplasmic male sterility. All the selections derived from KC220 and KC319 were maintainers with a genotype of Nrfrf, while all the selections from KC43 and KC47were restorers with a genotype of N(S)RfRf.

초저온 냉동보관법을 이용한 동종판막 이식술에 대한 연구 (Aortic and Pulmograft Transplantation Utilizing Cryopreservation)

  • 송명근;이동순
    • Journal of Chest Surgery
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    • 제23권4호
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    • pp.622-639
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    • 1990
  • The use of aortic valve homograft has been developed since 1962 when Ross and Barratt - Boyes independently replaced a diseased aortic valve with an orthotopically inserted homograft valve. And also surgical treatment of complex congenital cardiac malformations utilizing homograft extracardiac conduit has been tried with better result than any other prosthetic material. The present study was undertaken to clarify the safety tissue viability, sterility, after following our protocol of procurement of heart, dissection of aortic and pulmonic homograft, sterilization, cryopreservation, thawing and dilution, and transplantation on experimental animal, sheep. Tissue viability of valve and great artery was assessed by tissue culture. Sterility was evaluated by bacterial and fungal culture. The method used was proven no deleterious effect on the integrity of the valve. Tissue culture of valve tissue before, and after cryopreservation process resulted that active fibroblast growth was observed from homograft sterilized with antibiotics. And culture of the transplanted homograft from sacrificed animal showed active fibroblast growth. Pathologic examination of implanted valve tissue from sacrificed sheep showed mild calcification and minor change, but there were moderate and severe calcification of wall of great arteries.

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Hybrid Breeding of Red Pepper (Capsicum annum L.) Using Cytoplasmic Male Sterile Lines Combined with Phytophythora Resistance in Korea

  • Lee, Jang-Soo;Kang, Kwon-Kyoo;Hirata, Yutaka;Nou, Ill-Sup;Thanh, Vo-Cong
    • Plant Resources
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    • 제7권2호
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    • pp.127-135
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    • 2004
  • We characterized the resistances such as to waterlogging, Phytophythora and viruses in hybrids between Italian and Korean mother lines and screened them for complex resistances and agronomic traits to select elite multi-resistant lines for hybrid breeding. Resistance to waterlogging was selectable due to diversity of the resistance. Phytophythora resistance introduced from Italian lines could also be combined with resistance to other diseases and restoration abilities from cytoplasmic male sterility that has been maintained in Korean varieties.

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언양 자연 집단내 Drosophila melanogaster의 유해 유전자 빈도 분석 (Analysis of Frequencies of Deleterious Chromosomes in On-yang Natural Population of Drosophila melanogaster)

  • 김영필;최영현
    • 한국환경과학회지
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    • 제5권1호
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    • pp.1-6
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    • 1996
  • The genetic variabilities of second chromosomes of Drosophila melanogaster concealed in On-yang natural Population have been analyzed by the Cy/Pm method and an allelism test during two years(1993-1994). The mean frequencies of deleterious(lethal and semilethal) genes in On-yang natural population were estimated to be 23.97% in 1993 and 27.15% in 1994, respectively. The allelism rates between lethal genes in the population were 0.654%(1993) and 1.429%(1994). The mean values of elimination by frequencies of deleterious genes and allelism rates were 0.0004(1993) and 0.0010(1994), respectively. The frequencies of phenotypic sterility of males in 1994 were estimated to be 1.95%, and thoses of genotypic sterility of females and males were estimated to be 1.54% and 2.31%, respectively.

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세포질 유전자적 웅성불임계통을 이용한 유체 Heterosis 육종 개발에 관한 연구 제2보 웅성불임계통에 Non-Isogenic Maintainer를 활용한 유체 3원교잡F_1의 형질발현과 F_1종자생육 (Studies on Heterosis Breeding in Rapeseed Using Cytoplasmic Male Sterility 2, Agronomic Characteristics of F_1 Seed Production Procedure in the Three-way Crossing of Cytoplasmic-genetic Male Sterile, Non-Isogenic Maintainer and Restorer on Rape (Brassica napus L.))

  • 이정일;권병선
    • 한국작물학회지
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    • 제25권2호
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    • pp.49-57
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    • 1980
  • A $F_1$ hybrid out of 143 crosses of rape (Brassica napus) using cytoplasmic-genetic male sterility yielded 5.18 tons per hectare. European and native varieties used, were found out to have 78% and 58% of genes restoring fertility, respectively. The $F_1$ hybrids of three way cross using non-isogenic maintainer showed higher heteroses than those of double cross. To produce F 1 hybrids of three way cross, three stages of crossing operations are needed and seeds produced from about 60 hectares can be covered to 60, 000 hectares.

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