A novel soybean cultivar-Zhonghuang 68 was developed in the Institute of Crop Science,CAAS,which derived from cv. Zhonghuang 18( female parent,null lipoxygenase-2 gene) and line 7S3( Male parent,Karikoi-434,null α'-subunit and low content of β-subunit). This cultivar was developed by the biochemical marker assistant selection using High Performance Liquid Chromatography( HPLC) method for isoflavone content and Isoelectric Focusing-Polyacrylamide Gel Electrophoresis( IEF-PAGE) method for lipoxygenase genes. ...