Variation of Saponin Content in Korean Native Soybean Landraces Reintroduced from USA to Korea
2012
Jang, E.K., Chungbuk National University, Cheongju, Republic of Korea | Piao, Xiangmin, Chungbuk National University, Cheongju, Republic of Korea | Hwang, T.Y., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, S.L., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Chung, G.H., Chonnam National University, Yeosu, Republic of Korea | Tsukamoto, Chigen, Graduate School of Agriculture, Iwate University, Iwate, Japan | Choi, Y.M., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, M.C., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, J.R., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, H.S., Chungbuk National University, Cheongju, Republic of 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 ㎍ g-¹ to 1279.0 ㎍ g-¹ with an average of 484.9 ㎍ g-¹. Group B saponin content ranged from 2160.1 ㎍ g-¹ to 7868.6 ㎍ g-¹ with an average of 3670.0 ㎍ g-¹. Total saponin content including both group A and B contents ranged from 2502.8 to 8764.0 ㎍ g-¹ with an average of 4154.9 ㎍ 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 ㎍ g-¹ and total saponin content of 8764.0 ㎍ g-¹ among landraces. In the relationship among each components, group A saponin content showed a positive correlation 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.
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