粒重이 다른 在來種 大豆品種의 形質變異에 關한 硏究

Variation of agronomic characteristics along with seed weight of soybean local varieties

Sixty-seven Korean local soybean varieties having much variation in seed weight, from 8.2 to 32.0 grams of 100-seed weight, were cultivated to investigate the relationship between seed weight and several major agronomic characteristics. Along with the increase of seed weight, the rate of field emergence showed decreasing tendency while cotyledon dry weight, unifoliolate leaf area, leaf area index, and average leaflet area showed increasing tendency. Seed yield also showed nearly same trend as above characters, continuous increase up to 20 to 25 grams of 100-seed weight but it showed decreasing tendency afterwards. The increase of dry weight up to first flowering and plant height up to maturity showed positive correlation with seed weight, but the highest dry weight at maturity was found in 10 to 15 grams of 100 seed weight. Percentage of plants lodged showed decreasing trends with the increase of seed weight and positive correlation with the rate of total dry weight to the unit first internode dry weight.