2. content Analysis ofphcA between different pathogenicity of Ralstonia solanacearum Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR

3. Materials and methods  Strains FJAT-91 （ V ）、 FJAT-98 （ A ） and GMI1000  Cloning of phcA （ Genin et al. 2005 ） A 1.3 kb DNA fragment encompassing the phcA open reading frame was PCR-amplified using the primers phc1 and pCA2  Sequence Analysis of phcA TA Cloning and Sequencing （ BioSune ） Data Base:NCBI 、 Uniprot and Nr Analysis ofphcA between different pathogenicity of Ralstonia solanacearum

4. Results and analysis  Cloning of phcA — 3000 — 1000 — 500 M: DNA marker; "+": GMI1000; "-":ddw; 1: FJAT-91; 2: FJAT-98 Fig. 1 PCR-amplified of phcA of FJAT- 91 and FJAT-98 Analysis ofphcA between different pathogenicity of Ralstonia solanacearum

5. Results and analysis  TA Cloning and analysis of IS:2032 Analysis ofphcA between different pathogenicity of Ralstonia solanacearum Fig. 2 Sequence of FJAT-98 IS ： 2032bp virulence gene 1 ： gene 2 ： gene 3 ： IS: Fig. 3 Analysis of IS sequence Gene 1:transferase(tnpA); Gene 2:Methyltransferases; Gene 3:Unkown protein

6. Materials and methods  Strains Ralstonia solanacearum from different host plants （ 84 strains ）  BOX PCR-amplified and REP PCR-amplified 84 isolates Ralstonia solanacearum from different host plants were subjected to genomic fingerprinting using primer sets corresponding to BOX and REP elements （ Versalovic et al.,1994 ）  Cluster analysis of the BOX-PCR and REP-PCR DNA fingerprints Cluster analyses in SPSS were conducted with METHOD= Between- groups linkage and Furthest neighbor and Ward's method Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR

7. Results and analysis  BOX PCR-amplified Fig. 4 BOX-PCR amplified of Ralstonia solanacearum from different host plants Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR

8. Results and analysis  REP PCR-amplified Fig. 5 REP-PCR amplified of Ralstonia solanacearum from different host plants Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR

9. Results and analysis  Cluster analysis of the BOX-PCR and REP-PCR DNA fingerprints Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR λ=22 Cluster of BOX-PCR and REP-PCR analysis showed that genetic diversity of R. solanacearum was concerned with geographic origin and host plants, and different host plants played a leading role in the genetic difference of R. solanacearum.

10. Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR Results and analysis  Cluster analysis of the BOX-PCR DNA fingerprints λ=20 BOX-PCR was useful in separating strains based on geographic origin.

11. Results and analysis  Cluster analysis of the REP-PCR DNA fingerprints λ=8 Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR REP-PCR was useful in separating strains based on host plant.

12. Genetic diversity analysis of Ralstonia solanacearum based on BOX-PCR and REP-PCR Results and analysis  Different host plants played a leading role in the genetic difference of R. solanacearum.  BOX-PCR was useful in separating strains based on geographic origin. 700 bp and 900 bp was amplified in MinDong,200 bp 、 750 bp and 950 bp was amplified in MinBei,700 bp and 2000 bp was amplified in MinZhong.  REP-PCR was useful in separating strains based on host plant. 1050 bp and 2000 bp was amplified in eggplant and parts of tomato,1700 bp and 2100 bp was amplified in chilli,1250 bp 、 1500 bp and 3000 bp was not amplified in the parts of chilli and tomato.

13. thank you!