声明
Table of Contents
Abbreviation
List of Figures
List of Tables
摘要
Abstract
1 Introduction
1.1 Rapeseed relationship to brassica species,its origin and genome components
1.1.1 Genus Brassica in Brassicaceae and U’s triangle
1.1.2 Rapeseed:genetics and origin
1.1.3 Genomic constituents of B.napus,their genetics and genomics
1.2 B.napus genome Complexity
1.2.1 Whole genome triplication(WGT)in brassica
1.2.2 Genome down sizing
1.2.3 Subgenome dominance in polyploidy B.napus
1.2.4 Homeologous pairing and Chromosomal rearrangement in B.napus
1.3 Role of comparative mapping to dissect genomic components of B.napus
1.3.1 Comparative mapping between Arabidopsis and B.napus
1.3.2 Comparative mapping between B.napus and ancestors B.rapa and B.oleracea
1.4 Advent of molecular marker technology and application in B.napus
1.5 INDELs variations in genomes
1.5.1 Characteristics of INDELs
1.5.2 Mechanism of INDELs mutation
2.4.3 Factors effecting density and distribution of INDEL across the ge-nomes
1.6 Objectives
2 Materials and methods
2.1 Plant materials
2.2 DNA extraction and sample preparation
2.3 Construction of whole-genome shotgun libraries and sequencing
3.4 Procedures for INDEL discovery
2.5 Development of single-locus INDELs markers
2.6 Experimental validation of INDELs polymorphism
2.7 Polyacrylamide gel electrophoresis
2.7.1 Gel preparation
2.7.2 PCR product separation by electrophOresis
2.7.3 Silver staining
2.8 INDELs genetic linkage map construction
3 Results
3.1 Whole-genome re-sequencing of the 22 ILs
3.2 Identification of short INDEL polymorphisms
3.3 Genomic distribution of INDEL variations
3.4 Distribution of INDEL relative to genes and transposable elements
3.5 Development of INDEL markers
3.6 Genetic mapping of INDELs
4 Discussions
4.1 Certainty of B.napus genome sequencing
4.2 Challenges to B.napus sequencing and polymorphism detection
4.3 Identification of INDEL polymorphism
4.4 Characterization of INDEL polymorphism
4.5 Role of INDEL in genome complexity and variation
4.6 INDEL genotyping and mapping accuracy
Summary
References
Appendix
ACKNOWLEDGEMENTS