Progress in Cysteine-rich Gibberellic Acid-stimulated Arabidopsis Protein In vitro Study on the Interactions between Determinant Factors of Self-Incompatibility in Brassica oleracea L. var.capitata L. In vitro Study on the Interactions between Determinant Factors of Self-Incompatibility in Brassica oleracea L. var.capitata L. Detection of Interactions between SCR and SRK in Brassica oleracea L. by Yeast Two-Hybrid System