細胞質 雄性不稔系統을 利用한 靑刈飼料用 油菜 1代雜種 育成硏究 Ⅱ. 系統間 交雜에 있어서 主要形質에 대한 組合能力 및 相關

Studies on breeding of F₁ hybrid for forage rape using cytoplasmic male sterile lines Ⅱ. Estimates of combining ability and correlation for major traits in crosses of forage rape line

This study was conducted to obtain the information of the estimates of combining ability and correlation for major traits in crosses among CMS lines and forage rape varieties. Four lines of CMS, cytoplasmic male sterility (CMS) introduced from the West Germany, and four parents introduced from Europe, were crossed to obtain the sixteen hybrids according to M × N design. Estimated variance for general combining ability (GCA) was significant for all traits except the length of leaf. Specific combining ability (SCA) variance was also significant for all traits studied, but smaller than that of GCA. Highly significant positive GCA effects were observed for fresh forage weight in Velox, however GCA effects in CMS 3, Akela, Belinda and Maja, were showed negative for several traits. CMS 2 × Belinda and CMS 4 × Velox revealed relatively high SCA effects for fresh forage weight. A highly significant positive correlation were appeared between fresh forage weight and all of the other traits.