| Acknowledgement | 第8-11页 |
| 摘要 | 第11-14页 |
| Abstract | 第14-16页 |
| Chapter 1. Literature Review | 第17-39页 |
| 1.1 Nematode in Biodiversity Perspective | 第17-18页 |
| 1.2 Nematode in Ecological Web | 第18-19页 |
| 1.3 Mechanism of Nematode Interaction | 第19-21页 |
| 1.4 Advancement of Nematode Taxonomy | 第21-23页 |
| 1.5 Overview of Family Longidoridae and Trichodoridae | 第23-25页 |
| 1.6 Longidorids and Trichodorids Ancestry of Plant Parasitism | 第25-39页 |
| 1.6.1 The Family Longidoridae | 第26-32页 |
| 1.6.2 The Family Trichodoridae | 第32-39页 |
| 1.6.2.1 Taxonomy and Systematics | 第32-34页 |
| 1.6.2.2 General Morphology | 第34-36页 |
| 1.6.2.3 Biology, Feeding and Life Cycle | 第36-37页 |
| 1.6.2.4 Trichodorids - Tobravirus Association | 第37-39页 |
| Chapter 2. Materials and Methods | 第39-46页 |
| 2.1 Sampling Sites | 第39-41页 |
| 2.2 Soil collection and Nematode Extraction | 第41-42页 |
| 2.3 Morphological Examination | 第42-43页 |
| 2.4 Molecular Analysis | 第43-45页 |
| 2.4.1 DNA Extraction | 第43页 |
| 2.4.2 PCR and sequencing | 第43-45页 |
| 2.5 Phylogenetic Analysis | 第45-46页 |
| Chapter 3. Morphological and Molecular characterizations of Longidorid and Trichodoridnematodes occurring in 9 Provinces of China | 第46-146页 |
| 3.1 Nematode species identified during the study | 第46-48页 |
| 3.2 Morphological characterization of Longidorids occurring in China | 第48-114页 |
| 3.2.1 Family Longidoridae Thorne, 1935 (Meyl,1961) | 第48-114页 |
| 3.3 Morphological Identification of Trichodorids nematodes in China | 第114-146页 |
| 3.3.1 Family Trichodoridae (Thorne, 1953)Clark, 1961 | 第114-146页 |
| Chapter 4. Molecular analysis and Phylogenetic relationships of Longidorid and Trichodoridnematodes in this study | 第146-160页 |
| 4.1 Phylogenetic relationships of Longidorus and Xiphinema based on D2-D3 segment of 28Sregion | 第146-147页 |
| 4.2 Phylogenetic relationships of Longidorus and Xiphinema based on ITS 1 region | 第147页 |
| 4.3 Phylogenetic relationships of Longidorus and Xiphinema based on partial 18S region | 第147-148页 |
| 4.4 Phylogenetic relationships of X. brevicolle intraspecies based on mitochondrial COI region | 第148-149页 |
| 4.5 Phylogenetic relationships of Trichodorus and Paratrichodorus based on D2-D3 segment of28 S region | 第149页 |
| 4.6 Phylogenetic relationships of Trichodorus and Paratrichodorus based on ITS1 region | 第149-150页 |
| 4.7 Phylogenetic relationships of Trichodorus and Paratrichodorus based on partial 18S region | 第150-160页 |
| Chapter 5. Discussions and Conclusion | 第160-165页 |
| REFERENCES | 第165-174页 |
