콩 品種과 根瘤菌(bradyrhizobium japonicum)間의 宿主親和性 및 相互作用

Host affinity and interaction between soybean varieties and bradyrhizobium japonicum

The host affinity and interaction between soybean variety and nodule bacteria strain including R-214, USDA110, and A-1017H⁺ selected as high N-fixing strain in Korea, America and Japan, respectively were examined. The host specificity of nodule strains and various degrees of host affinities between soybean varieties and nodule strains were very high for R-241 with Hwangkeumkong, Jangyeobkong, Union, and Toyosuzu, etc.: very low for R-214 with A-1017H⁺ and IAC-2 and Peking soybean varieties introduced from Brazil and China. High affinity for USDA110 with Jangyeobkong, Hwangkeumkong, Kwangkyo, Williams82, Nambushirome was detected. In general, R-214 originated in Korea showed high host affinity with most of soybean varieties tested. USDA110 known having broad host affinity in America showed a quite good affinity with all soybean varieties. On the contrary, A-1017H⁺ known as a good nodule strain in Japan showed very low host affinity with soybean varieties presented variable response with soybean varieties.