Skip to main content
SLU publication database (SLUpub)
Research article - Peer-reviewed, 2006

Stability of transgene integration and expression in subsequent generations of doubled haploid oilseed rape transformed with chitinase and beta-1,3-glucanase genes in a double-gene construct

Melander M, Kamnert I, Happstadius I, Liljeroth E, Bryngelsson T


A double-gene construct with one chitinase and one beta-1,3-glucanase gene from barley, both driven by enhanced 35S promoters, was transformed into oilseed rape. From six primary transformants expressing both transgenes 10 doubled haploid lines were produced and studied for five generations. The number of inserted copies for both the genes was determined by Southern blotting and real-time PCR with full agreement between the two methods. When copy numbers were analysed in different generations, discrepancies were found, indicating that at least part of the inserted sequences were lost in one of the alleles of some doubled haploids. Chitinase and beta-1,3-glucanase expression was analysed by Western blotting in all five doubled haploid generations. Despite that both the genes were present on the same T-DNA and directed by the same promoter their expression pattern between generations was different. The beta-1,3-glucanase was expressed at high and stable levels in all generations, while the chitinase displayed lower expression that varied between generations. The transgenic plants did not show any major impact on fungal resistance when assayed in greenhouse, although purified beta-1,3-glucanase and chitinase caused retardment of fungal growth in vitro

Published in

Plant Cell Reports
2006, Volume: 25, number: 9, pages: 942-952
Publisher: SPRINGER

      SLU Authors

    • Liljeroth, Erland

      • Department of Crop Science, Swedish University of Agricultural Sciences
      • Bryngelsson, Tomas

        • Department of Crop Science, Swedish University of Agricultural Sciences

      UKÄ Subject classification

      Agricultural Science

      Publication Identifiers


      Permanent link to this page (URI)