Abstract
Isoflavones in soybean is paid widely and extensively attention due to its function in physical health care. As important secondary metabolic compounds in soybean seeds, isoflavones content have been reported to be easily impacted by environment. To survey the difference of isoflavones content in soybean seeds in different environment in Heilongjiang, which is main area to plant soybean in China, four cultivars were planted at five locations from 2005 to 2007. There were significant difference in total and individual isoflavones contents among years, locations, genotypes and genotypes × locations. The mean contents of total isoflavones and individual hydrolyzing isoflavones were significantly higher in 2006 than those in the other two years. And, total and individual isoflavone contents were significantly positively correlated with latitude of the locations at the 0.01 probability level. As a whole, there are predominant production regions for isoflavones of soybean seeds in Heilongjiang province, so it was feasible to categorize the production regions based on soybean isoflavone in Heilongjiang province.
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