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밭 못자리에서의 벼 稻熱病 抵抗性의 二面交配 分析 : Ⅱ. Combining Ability Ⅱ. 組合能力
에프 제이 자파타,奇韻桂,金基淸,李榮萬 全南大學校 農漁村開發硏究所 1990 農業科學技術硏究 Vol.25 No.-
벼 9個 品種을 二面交配하여 交配親과 F의 圃揚에서 調査된 稻熱病의 罹病程度와 病斑面積率의 組合能力을 分析하였다. 1. 韓國에서는 罹病程度에서 一般組合能力(GCA) 分散量이 特定組合能力(SCA) 分散量보다 약간 작았으나 病斑面積率에서는 GCA가 SCA보다 더 컸다. 2. 필리핀에서는 罹病程度에서는 SCA는 有意性이 없었고 GCA만 有意하였으며, 病斑面積率은 GCA가 SCA보다 컸다. 3. 一般組合能力 效果는 韓國과 필리핀 共히 抵抗性 品種이 抵抗性 쪽으로 效果가 컸다. 4. 特定組合能力 效果는 抵抗性이 强한 品種이나 極히 罹病性인 品種과 交配된 組合은 거의 다 抵抗性쪽으로 效果가 큰 傾向을 보였다. For the combining ability analysis, nine rice varieties and the F hybrids from a set of diallel cross were evaluated for their reactions to Pyricularia oryzae. Plants were exposed to natural inoculum at blast nursery of IRRI, Philippines and Honam Crop Experiment Station, Korea. Mean squares for both GCA and SCA effects for lesion rate were significant in Korea, but that for SCA effects for lesion rate were significant in Korea, but that for SCA in the Philippines was not significant. Field data in Korea revealed those for GCA and SCA effects were similar. However, mean squares for GCA were greater than those for SCA in the Philippines. For diseased leaf area, mean squares for GCA were greater than those for SCA in both countries.
밭 못자리에서의 벼 稻熱病 抵抗性의 二面交配 分析 : Ⅰ. Genetic Analsis Ⅰ. 遺傳分析
李榮萬,에프 제이 자파타,奇韻桂,金基淸 全南大學校 農漁村開發硏究所 1990 農業科學技術硏究 Vol.25 No.-
벼 稻熱病에 대하여 圃場에서 抵抗性 程度를 달리하는 자포니카型 個 品種을 二面交培하여 交配親과 F을 供試하여 罹病程度와 病斑面積率로서 稻熱病 抵抗性의 遺傳分析을 實施하였다. 1. 韓國에서 모든 F의 抵抗性이 交配親보다 높아 優性의 강한 雜種强勢를 나타내었다. 필리핀에서도 抵抗性이 優性을 보였다. 2. 韓國에서는 分散(Vr)에 대한 共分散(Wr)의 回歸分析에서 罹病程度는 超優性을, 病班面積率은 完全優性을 나타내었다. 필리핀에서는 둘 다 部分 優性을 보였다. 3. 韓國에서 罹病程度는 相加性效果가 優性效果보다 적었으나 病班面積率은 비슷하였다. 필리핀에서는 罹病程度 相加性效果가 컸고 病班面積率은 비슷하였다. 4. 遺傳力은 韓國과 필리핀 다 廣義의 遺傳力은 높았으나 狹義의 遺傳力은 낮았다. For the genetic analysis, nine rice varieties and the F hybrids from a set of diallel cross were evaluated for their reaction to Pyricularia oryzae. Plants were exposed to natural inoculum at blast nursery of IRRI, Philippines and Honam Crop Experiment Station, Iri, Korea. The degree of genetic dominance controlling disease reaction was estimated by using covariance(Wr)-Variance (Vr) graphic analysis. In Korea (Iri), the lesion rate for blast resistance revealed over-dominance, while estimate by percentage of diseased leaf area exhibited near complete-dominance. Partial dominance was observed in the lesion rate and percentage of diseased leaf area in the Philippines (IRRI). The component of variance in the lesion rate for resistance to rice blast revealed that dominant effects were more prevalent than additive effects. But the magnitude of dominant and / or additive effect was not much different in percentage of diseased leaf area. Estimated heritability in the broad sense was very high while the narrow sense was very low.