Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/31/2001
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: Soybean isoflavones are biologically active compounds that may have significant impact on human health. The objective of this research was to identify diversity in isoflavone content in selected U.S. cultivars and plant introductions (PIs) from the USDA Soybean Germplasm Collection. From 400 PIs analyzed by HPLC for isoflavone concentration, 38 PIs in maturity groups (MGs) II to IV selected for high or low isoflavone concentration and 31 U.S. cultivars released between 1953 and 2000 were grown at three locations in central Illinois in 2000 with 2 replications per location. Analysis of variance revealed significant effects for entries, locations, and entry by location interactions for total isoflavones and amounts of daidzein and genistein. Only the entry effect was significant for glycetein concentration. Although the entry by location interaction was significant for total isoflavones, selecting the highest or lowest 10 entries at any one location would have identified the five highest or lowest entries based on overall means. PIs were identified with significantly higher or lower isoflavone content than any U.S. cultivar tested. Later maturity is generally associated with higher levels of isoflavones but between entries with similar maturity dates total isoflavone content can differ by over four fold.