声明
摘要
Abstract
Contents
Abbreviation
CHAPTER 1 INTRODUCTION
1.1 Potato and Late blight disease
1.2 Phytophthora infestans
1.2.1 Taxonomic classification
1.2.2 Life cycle
1.2.3 Molecular markers to identify clonal lineages of Phytophthora infestans
1.3 Population genetics of Phytophthora infestans worldwide
1.3.2 Phytophthora infestans in Europe
1.3.3 Phytophthora infestans in Africa and Asia
1.3.4 Phytophthora infestans in SouthAmerica
1.3.5 Phytophthora infestans in North America
1.4 The Evolutionary potential of Phytophthora infestans
1.4.1 Mutation
1.4.2 Populaion size
1.4.3 Migration
1.4.4 Mode of reproduction
1.4.5 Selection
1.5 Risk posed by Phytophthora infestans for overcoming control methods
1.6 Objectives and scope of this dissertation
CHAPTER 2 POPULATION GENETICS OF Phytophthora infestans IN SICHUAN PROVINCE OF CHINA
2.1 ABSTRACT
2.3.1 Potato in China
2.3.2 Importance of Sic uan province for potato production
2.4 Objectives
2.4 Materials and methods
2.4.1 Sampling of the isolates
2.4.2 Isolate purification and storage
2.4.3 Determination of mating types
2.4.4 DNA extraction
2.4.5 SSR analysis
2.5 Data analysis
2.5.1 Ploidy level
2.5.2 Genetic diversity
2.5.3 Genetic Structure analysis
2.6 Results
2.6.1 Profile of SSR markers
2.6.2 Genetic variation by region
2.6.3 Population structure
2.6.4 Mating Type
2.7 Discussion
CHAPTER 3 In Vitro Sensitivity of Phytophthora infestans Strains against the Two Fungicides
3.1 Abstract
3.2 Keywords
3.3 INTRODUCTION
3.4 REVIEW OF LITER ARITTE
3.5 Purpose and objectives
3.6 Material and Methods
3.6.1 Test strains
3.6.2 Test reagent
3.6.3 Test medium
3.6.4 Screening of fungicide concentrations
3.6.5 Growth Fluctuation Test
3.6.6 Determination of mating types
3.6.7 DNA extraction
3.6.8 SSR analysis
3.7 Data analysis
3.8 Results
3.8.1 Fungicide screening test
3.8.2 Growth Fluctuation Test
3.8.3 SSR analysis
3.8.4 Mating type analysis
3.9 Discussion
Conclusion
References
ACKNOWLEDGEMENT