三面交雜에 依한 水稻의 量的 形質의 遺傳分析에 關한 硏究 = Genetic Studies on Some Ruantitative Characters of Rice by Diallel Crosses

국문 초록 (Abstract)

5×5 二面交雜에 의한 水稻의 2가지 量的形質(止葉長, 止葉幅)에 對한 優性程度, 組合能力, 遺傳子分布 等을 檢定하기 위하여 實驗을 한 바 그 結果를 要約하면 다음과 같다.
1. 止葉長과 止葉幅의 遺傳은 部分優性으로 劣性對立遺傳子가 크게 關與하였으며 止葉長의 遺傳에는 1個程度의 major gene과 多數의 minor gene이 止葉幅에는 2個 以上의 majargene이 關與하는 것으로 推定되었고, 止葉長이 긴쪽과 止葉幅이 넓은 쪽이 優性인 것으로 나타났다.
2. 組合能力檢定結果 2形質 모두 高度의 GCA SCA效果가 認定되었으며 GCA가 SCA보다 컸고 來敬과 農白의 GCA效果가 가장 컸으며, SCA 效果는 止葉長에 對해서는 嶺南早生×農白의 組合이 止葉幅에 對해서는 嶺南早生×維新의 組合이 가장 컸다.

다국어 초록 (Multilingual Abstract)

Five parent diallel crosses were used as the materials to obtain basic informations for degree of heterosis and combining ability on 2 agronomic characters of rice plants. The results obtained are summarized as follows;
1. As shown in Vr, Wr graph, flag leaf length and flag leaf width showed partial dominance, and inheritance of them were controlled by recessive allelic genes. It was founded that 2 characters were rulled by 1 or more major genes and minor genes, exhibited to dominance. Directions of dominance were long flag leaf and wide flag leaf.
2. In analysis of combining ability, mean square values of GCA were more greater than those of SCA in 2 characters. Raekyung and Nongbaek expressed high positive GCA effects in two characters. The highest positive SCA effects were expressed on Yeongnam－Josaeng×Nongbaek cross for flag leaf length, and on Yeongnam－Josaeng×Yushin cross for flag leaf width.