声明
摘要
Abstract
Dedication
Table of Contents
List of Tables
List of Tables continued
List of Figures
List of Appendixes
Abbreviations
CHAPTER 1 INTRODUCTION
1.1 Production and economic importance of cotton
1.2 Cotton germplasm resources and diversity
1.2.1 The cotton gene pool
1.2.2 Origin and distribution of Upland cotton
1.2.3 Genetic diversity extent in Upland cotton
1.3 Molecular markers used in cotton genetic study
1.3.1 Restriction fragment length polymorphisms(RFLPs)
1.3.2 Randomly amplified polymorphic DNA(RAPD)
1.3.3 Amplified fragment length polymorphisms(AFLPs)
1.3.4 Simple sequence repeats(SSRs)
1.3.5 Single-nucleotide polymorphisms(SNPs)
1.4 Quantitative traits
1.5 Linkage mapping
1.6 Association mapping
1.6.1 Why association mapping?
1.6.2 Candidate gene and genome-wide association mapping
1.6.3 Linkage disequilibrium and association mapping
1.6.4 Quantifying linkage disequilibrium
1.6.5 Factors affecting linkage disequilibrium
1.6.6 Implication of linkage disequilibrium in association mapping
1.6.7 Linkage disequilibrium and association mapping in cotton
1.7 Study hypothesis and objectives
CHAPTER 2 MATERIALS AND METHODS
2.1 Plant genetic materials
2.2 Field experiment
2.2.1 Experimental locations
2.2.2 Experimental design and procedures
2.2.3 Data collection on phenotypic traits
2.3 Laboratory experiment
2.3.1 SSR markers selection
2.3.2 Genomic DNA extraction
2.3.3 PCR amplification
2.3.4 Gel electrophoresis
2.4 Molecular data collection and analysis
2.4.1 Genetic diversity and phylogeny
2.5 Association analysis
2.5.1 Phenotypic data analysis
2.5.2 Population structure and differentiation
2.5.3 Relative kinship
2.5.4 Linkage disequilibrium
2.5.5 Marker-trait association
CHAPTER 3 RESULTS
3.1 Genetic diversity and phylogenic analysis
3.1.1 SSR polymorphisms in the whole germplasm
3.1.2 Genetic distance and phylogenic analysis in the whole germplasm
3.1.3 Genetic distance and phylogenic analysis in the model-based Bayesian populations
3.1.4 SSR polymorphisms within inferred and predefined populations
3.2 SSR marker-trait association analyses
3.2.1 Performance evaluation,correlations and heritability estimates of phenotypic traits
3.2.2 Population structure and differentiation
3.2.3 Pair-wise relative kinship
3.2.4 Linkage disequilibrium
3.2.5 SSR loci associated with fiber yield and quality traits
CHAPTER 4 DISCUSSIONS
4.1 Genetic diversity
4.2 Population structure and kinship
4.3 Variations of quantitative traits
4.4 Linkage disequilibrium
4.5 QTL identified through genome-wide association mapping
CONCLUSIONS
REFERENCES
APPENDIXES
ACKNOWLEDGEMENTS
CURRICULUM VITA