水稻品種의 組合能力과 有用形質間의 關係解析 = Relationsthp between Combining Ability in Early Hybrid Generations and Agronomic Characteristics of Parental Varieties in Paddy Rice

국문 초록 (Abstract)

9個의 水稻 Semi-dwarf 型 品種을 交配親으로 하여 36組合의 二面交雜을 실시하여 F₁과 F₂에서의 組合能力을 檢定하였고 組合能力과 交配親의 實用形質間의 關係를 究明한 結果는 아래와 같다.
1) F₁에서 나타난 株當粒重 및 收量構成要素에 대한 組合能力의 差異는 주로 一般組合 能力의 差異에 基因하였으나 F₂에서의 株當粒重은 特殊組合能力의 差異가 더 크게 작용하였다.
2) IR24 및 IR2061-214는 F₁이나 F₂에서 株當粒重에 대한 一般組合能力이 優秀했는데 이는 收量構成要素의 組合能力으로도 解析이 가능하였다.
3) F₁이나 F₂에서 株當粒重의 一般組合能力이 優秀하였던 IR24 및 IR2061-214는 使用된 Semi-dwarf品種 中에서 稈長이 긴 便에 속하였다.
4) 株當粒重, 一株穗數 및 登熟比率의 交配親別 F₁系列平均値와 株當粒重의 F₁ 一般組合能力間에는 正의 相關關係가 成立되었다.
5) 결과적으로 株當粒重에 대한 F₁ 및 F₂에서의 一般組合能力은 交配親의 稈長과 關係가 있는 것으로 解析되었다.

다국어 초록 (Multilingual Abstract)

36 rice crosses were made using 9 semi-dwarf rice cultivars as their parents, and combining abilities for grain weight and yield components were estimated in F₁ and F₂. Relationships between combining ability and agronomic characteristics were studied, and results obtained were summarized as follows;
1. Effects of general combining ability were much more than that of specific combining ability for grain weight per hill and yield components in F₁, but the former was less than the latter for grain weight per hill in F₂.
2. IR 24 and IR 2061-214 showed higher general combining ability for grain weight per hill both in F₁and F₂. Combining abilities for yield components supported the level of combining ability for weight per hill.
3. IR 24 and IR 2061-214, which showed higher general combining ability, were longer in culm length among semi-dwarf rice varieties.
4. General combining ability in F₁ showed positive correlations with parental F₁ array mean value of grain weight per hill, number of panicles per hill and percent of matured grain.
5. It was suggested that general combining ability for grain weight per hill in F₁ and F₂ might be related with plant height of parental variety in case of semi-dwarf rices.

목차 (Table of Contents)

• Ⅰ. 緖論
• Ⅱ. 材料 및 方法
• Ⅲ. 結果 및 考察
• 1. 組合能力檢定
• 2. 組合能力과 有用形質間의 關係
• 3. 世代間 關係
• Ⅳ. 摘要