大豆品種間 耐冷性의 差異에 關한 硏究

Studies on the Varietal Responses for Cold Tolerance in Soybean

Germination test with 1,429 Korean native soybean lines was made at 10℃ for the selection of cold tolerant lines. Out of the entries tested, 62 cold tolerant lines and 56 cold intolerant lines were identified. Most of cold tolerant lines were originated from the provinces of Kyonggi and Kangwon, and the cold intolerant lines were collected from Kyongnam and Cheonnam provinces of Korean Peninsula. Most cold tolerant lines have black and brown seed coat color, while the cold intolerant lines have yellow and green seed coat color. For a field test, the selected two groups were planted twice on 4 April and 15 May 1979, and emergence, plant height and other related agronomic characters were investigated. Percent of emergence and plant height in the cold tolerant group were significantly higher than those identified as cold intolerant lines at early growth stages under the chilly spring condition. Number of nodes and branches and plant height at the time of harvest were not increased in cold tolerant lines, but number of pods was significantly increased.