声明
Contents
ABSTRACT
摘要
Abbreviation
1 Introduction
1.1 General introduction
1.2 Maize(Zea mays L.)
1.2.1 Importance
1.2.2 Approach in maize genetics
1.2.3 Maize breeding
1.3 QTL mapping technology
1.3.1 Principles for QTLmapping
1.3.2 Markers-assisted backcrossing(MAB)
1.3.3 Selection for the recurrent parent genome
1.3.4 Population size
1.3.5 Marker density
1.3.6 Population type
1.3.7 Recombination frequency
1.3.8 Genetic effect
1.3.9 Molecular markers:SSR
1.3.10 Biometrical tools for QTL analysis
1.3.11 Advances in QTL mapping
1.4 Research background
1.4.1 Maize kernel row number(KRW)
1.4.2 Identification of qKRN8 with F2 populations
1.4.3 Genetic effect of qKRN8
1.5 Objectives
2 Materials and methods
2.1 Material
2.1.1 Plant material
2.1.2 QTL-NIL’s construction
2.2 Methods
2.2.1 DNA extraction
2.2.2 Primer design
2.2.3 Population screen
2.2.4 Foreground analysis
2.2.5 Background analysis
2.2.6 Phenotype evaluation
2.2.7 QTL mapping
2.2.8 Data analysis
3 Results
3.1 Foreground selection for qKRN8
3.2 Background selection for L87 genome
3.2.1 Markers selection
3.2.2 Background selection and construction of BC3F1 mapping population
3.3 Mapping of qKRN8 in backcross population(BC3F1)
3.3.1 Primers design
3.3.2 Serceening of BC3F1 population
3.3.2 Screening of BC3F1 population
3.3.4 QTL mapping in BC3F1
3.3.5 Recombinants selection
3.4 Genetic analysis on the BC4F1 big population
3.4.1 Marker design
3.4.2 Genotyping and identification of recombinants
3.5 BC4F2 results
4 Discussion
4.1 Background selection and recurrent genome recovery
4.2 Mapping and introgression of qKRN8
4.3 Kernel row number and yield development
Conclusion
References
Acknowledgements