Studies on Factor of High Rate Regeneration Plant of Descurainia sophia Hypocotyl Cloning and analysis of hmgr gene conserved fragments in Descurainia sophia Extraction and Identification of Several Glucosinolates in Descurainia sophia Seeds Effects of Water Extract of Two Weeds on Seed Germination and Seedling Growth of Different Wheat Varieties Determination of quercetin-3-O-β-D-glucopyranosyl -7-O-β-D-gentiobioside in Semen Descurainiae by HPLC Genetical Studies on Progenies of Somatic Hybrids between Brassica napus and Descurainia sophia A Preliminary Study on the Introduction of Descurainia sophia, an Oil Plant Species for Industrial Uses