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RISS 인기검색어
- 검색키워드
- 저자 : J. B. RYU(柳長發) (검색결과 4 건)
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Seedling height growth and the variation in F₁ and F₂ generations of pinus rigide × p.taeda.
J. B. Ryu(柳長發),G. S. Jhun(全桂相),S. K. Hyun(玄信圭) 한국육종학회 1984 한국육종학회지 Vol.16 No.1
Height growth of seedlings and the variation in pitch-loblolly pine F₁ and F₂ generations produced for 12 years were compared. No differences between F₁ and F₂ were found either in seedling height or variation in seedling height. “Additive gene effects” and/or “hybrid habitat” hypotheses seem to explain the phenomena. In addition to the above two hypotheses, many genetically variable trees used for crossing for F₁ and F₂ production would also result in similar variation between F₁ and F₂. The term of F₁ and F₂, and utilization of F₂ in forestry were discussed.
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솔잎혹파리 내충성 (耐蟲性) 품종 육성에 관한 연구 2. 솔잎혹파리 내충성 Pinus thunbergii 의 침엽내 monoterpene 의 계절적변화
김정석,홍성호,류장발,최철,김종수 ( C . S . Kim,S . H . Hong,J . B . Ryu,C . Choi,J . S . Kim ) 한국산림과학회 1976 한국산림과학회지 Vol.32 No.1
Employing 7-15 resistant and 8-15 susceptible Japanese black pine (Pinus thunbergii Parl.) trees to pine gall midge (Thecodiplosis japonensis Uchida et Inouye) as samples, needle monoterpenes were analysed by GLC in January and June, and observation was made on the oviposition preference. Following results were obtained. 1. In January, the resistant trees showed higher contents of myrcene, limonene, β-phellandrene and terpinolene but lower contents of α-and β-pinene and camphene compared to the susceptible trees. But in June, α-pinene, camphene, limonene, β-phellandrene and terpinolene were higher and the content of β-pinene and myrcene were lower in the resistant trees than the susceptible trees. 2. The content of limonene was higher by the 6.8 percent and the content of β-pinene was lower by the 9.2 percent in the resistant trees than in the susceptible trees in June. 3. No preference for oviposition was found between resistant and susceptible trees. But in the resistant trees gall formation rate was quite lower than the susceptible trees. It was considered, therefore, that limonene and β-pinene content in the needle might be used as an indicator of the resistant Japanese black pine to the pine gall midge regardless of season.
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솔잎혹파리 耐虫性 品種 育性에 關한 硏究 Ⅰ. 耐虫性 選拔木의 虫廮形成度 및 含有 Monoterpene의 組成
C. S. Kim(金鼎錫),S. H. Hong(洪性昊),C. Choi(崔澈),J. W. Kim(金鍾完),J. B. Ryu(柳長發),M. H. Park(朴文漢) 한국육종학회 1975 한국육종학회지 Vol.7 No.3
Employing 13 resistant and 17 susceptible Japanese black pine (Pinus thunbergii Parl.) trees to pine gall midge (Thecodiplosis japonensis Uchida et Inouye) as sample, observations were made on the needle length, the ratio of gall-formed needles, the number of larva per gall and the weight of larva. And, monoterpenes of the oleoresin of 1-year-old branches, new shoots and needles were analysed by means of gas liquid chromotograph. And, following results were obtained. 1. Oviposition of pine gall midge was also made on the neeldes of resistant trees, but the larvae were mostly dead afterward. 2. The percentage of gall-formed needles in the resistant trees was 2.0, and the number of larva per gall and the weight of 100 larvae in the resistant trees were 640 and 91.4 percent respectively of those in the susceptible trees. 3. No directional differences in monoterpene composition were found in 1-year-old branches and the new shoots of the same trees. 4. The contents of limonene and β-phellandrene were higher and the content of β-pinene was lower in the resistant than in the susceptible trees in the their 1-year-old branches and new shoots. 5. In the needles, the resistant trees showed higher contents of limonene and terpinolene but lower contents of both α-and β-pinene compared to the susceptible trees. 6. In all of the 1-year-old branches, the new shoots and the needles, limonene was always higher and β-pinene was lower in their contents in the resistant trees than in the susceptible trees. Especially the limonene content in the needle was significantly higher in the resistant trees compared to the susceptible trees. It was, therefore, considered that the limonene content in the needle might affect the resistance of the Japanese black pine to the pine gall midge.
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솔잎혹파리 耐蟲性 品種 育成에 關한 硏究 Ⅱ. 솔잎혹파리 耐蟲性 Pinus thunbergii의 針葉內 Monoterpene의 季節的 變化
C. S. KIM(金鼎錫),S. H. HONG(洪性昊),J. B. RYU(柳長發),C. CHOI(崔澈),J. S. KIM(金鍾秀) 한국육종학회 1976 한국육종학회지 Vol.8 No.3
Employing 7-15 resistant and 8-15 susceptible Japanese black pine (Pinus thunbergii Parl.) trees to pine gall midge (Thecodiplosis japonensis Uchida et Inouye) as samples, needle monoterpenes were analysed by GLC in January and June, and observation was made on the oviposition preference. Following results were obtained. 1. In January, the resistant trees showed higher contents of myrcene, limonene, β-phellandrene and terpinolene but lower contents of α-and β-pinene and camphene compared to the susceptible trees. But in June, α-pinene, camphene, limonene, β-phellandrene and terpinolene were higher and the content of β-pinene and myrcene were lower in the resistant trees than the susceptible trees. 2. The content of limonene was higher by 6.8 percent and the content of β-pinene was lower by 9.2 percent in the resistant trees than in the susceptible trees in June. 3. No preference for oviposition was found between resistant and susceptible trees. But in the resistant trees gall formation rate was quite lower than the susceptible trees. It was considered. therefore, that limonene and β-pinene content in the needle might be used as an indicator of the resistant Japanese black pine to the pine gall midge regardless of season.
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