여름무우 品種改良에 있어서 單株系統法의 利用硏究 Ⅱ. 二面交雜에 依한 雜種强勢, 組合能力 및 形質相關에 關하여

Studies on applying the single seed descent method for breeding summer varieties in radish, raphanus sativus L. (Ⅱ) Heterosis, Combining Ability and Correlation from Diallel Crosses

Five inbred lines developed by the single seed descent method and their 10 F₁ hybrids of radish by the half diallel cross were cultivated in summer season. The results of estimated heterosis, combining ability and correlation between 8 characters are summerised as follows : 1. Heterosis was significant at the 1% level for 6 characters, especially high for root weight(146%), leaf weight(52.6%) and index of virus susceptibility(-51.2%). 2. GCA effect was significant for all characters except root diameter and susceptibility of soft rot. SCA effect was significant for root length and leaf length. 3. Root weight was correlated with leaf length, root length and diameter. Susceptibility of virus and soft rot was not correlated with any other character.