水稻品種의 二面交雜에 의한 量的形質의 遺傳分析 Ⅳ. 자포니카 水稻品種의 source 및 生長解析關聯形質에 대한 組合能力

Inheritance of quantitative characters in diallel cross of rice Ⅳ. Combining ability of growth analysis characters in japonica rice

The combining ability of source related characters such as leaf area index, leaf weight ratio, specific leaf weight, specific leaf area, and growth analysis related characters such as crop growth ratio, relative growth ratio, and net assimilation ratio were studied on the F₁ generation of 15 crosses from the partial diallel cross of 6 Japonica rice varieties. The effects of general combining ability(GCA) and specific combining ability (SCA) were highly significant for leaf area index, leaf weight ratio, specific leaf weight, specific leaf area, crop growth ratio, relative growth ratio and net assimilation ratio in the F₁ generation and the GCA of leaf weight ratio and net assimilation ratio was greater than SCA. The effects of GCA and SCA were different by characters, but the GCA and SCA to specific leaf area and leaf weight ratio were quite great. Cheolweon 34 and Ishiokamochi 7 as parents were quite effective for increasing specific leaf area and RAC 3 was quite good for increasing crop growth ratio and net assimilation ratio.