Construction of Adenovirus Vector Containing Rat β-catenin or ΔN90 Gene and Its Expression in MSCs Research Advances of Virus-induced Gene Silencing Technology in Plant Development of a Lentivirus Vector-based Vaccine Carrying Follicle-stimulating Hormone Receptor and Assay of Its Immunological Effect Research Advances on Increasing the Transduction Efficiency of Recombinant Adeno-associated Viral Vectors Construction of Recombinant Adenovirus Vector of Co-expressing MRP and EF Gene from Streptococcus suis Type 2