미국으로부터 재도입된 한국 원산 콩 재래종의 Saponin 함량 변이

Variation of Saponin Content in Korean Native Soybean Landraces Reintroduced from USA to Korea

This study was carried out to assess the variation of saponin contents in 293 Korean native soybean landraces reintroduced from USA to Korea in 2007. Group A saponin content ranged from 149.8 μg g-1 to 1279.0 μg g-1with an average of 484.9 μg g-1. Group B saponin content ranged from 2160.1 μg g-1 to 7868.6 μg g-1 with an average of 3670.0 μg g-1. Total saponin content including both group A and B contents ranged from 2502.8 to 8764.0 μg g-1 with an average of 4154.9 μg g-1. Five promising landraces for use as breeding materials that showed higher than any other landraces in group B and total saponin content were IT226841, IT226761, IT226841, IT226828 and IT228534. IT226841 showed the highest saponin content with group B content of 7868.5 μg g-1 and total saponin content of 8764.0 μg g-1 among landraces. In the relationship among each com-ponents, group A saponin content showed a positive cor-relation with group B saponin content (r=0.3708) and total saponin content (r=0.5119). Group B saponin content showed a very high positive correlation (r=0.9876) with total saponin content. When landraces were compared for the total saponin content based on collected location, landraces from North Korea showed the highest, Gyeonggi-do showed second highest content, followed by Chungcheongbuk-do, Gangwon-do, Gyongsangbuk-do, Chungcheongnam-do, Gyongsangnam-do, Jeollabuk-do and Jeollanam-do. Landraces were also grouped according to seed size and seed coat color. Small seed group was higher than medium and large seed groups that showed no significant difference in total saponin content. Seed coat colors showed no significant difference in total saponin content.