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Isoflavones in Seeds of Field‐Grown Soybean: Variation Among Genetic Lines and Environmental Effects
Author(s) -
Britz Steven J.,
Schomburg Charlotte J.,
Kenworthy William J.
Publication year - 2011
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-010-1723-6
Subject(s) - daidzein , isoflavones , glycitein , genistein , sowing , biology , agronomy , glycine , zoology , crop , precipitation , botany , horticulture , geography , endocrinology , biochemistry , amino acid , meteorology
This study was undertaken to determine how seed isoflavones from soybean [ Glycine max (L.) Merr.] lines differing in their maturity group, change between locations and years with different weather conditions. Seeds from 15 lines representing four maturity groups grown at three locations in Maryland (full season at all three and double crop at one location) were analyzed from 2001 to 2002, representing one relatively normal and one warm and dry year, respectively. Comparing lines, total isoflavones averaged for both years and all locations/planting dates ranged between 4.7 μmol [g seed dry matter (SDM)] −1 in MD95‐5358 and 8.7 μmol (g SDM) −1 in Stressland. Isoflavones were reduced by about 50% in early maturing soybean lines in 2002 compared to 2001 under warmer conditions on the Eastern Shore of Maryland but not in the cooler central Maryland location. Isoflavones were not affected consistently or to a large extent in later maturity lines at any location or planting date combination. Relative changes in genistein, daidzein, and total isoflavones were similar to each other, whereas glycitein was much more variable. The results suggest that early maturing soybean lines are more likely to be affected by changes in temperature and precipitation.