文摘
英文文摘
论文说明
资助
Acknowledgements
1 Introduction
2 Literature review
2.1Germplasm resources
2.2What is a core collection?
2.2. 1 Methods for creating core collections
2.2.2 Challenges facing core collections
2.2.3 Promise
2.2.4 Core collection sample size
2.2.5 Core development strategies
2.3Recent advances and plant breeding applications of core collections
2.3.1 The link between Core collections and genebank research
2.3.2 Study of plant diversity
2.3.3 Core concept with user's interest
2.3.4 Synteny among plant genomes
3 Materials and methods
3.1Rice sample preparation
3.2Spectroscopic analysis
3.2.1 NIR Spectroscopy
3.2.2 Development of sample calibration
3.2.3 Data preprocessing
3.2.4 Derivation of calibration equations
3.2.5 NIRS rice sample trait analysis
3.3Statistical models
3.3.1 Mahalanobis distance
3.3.2 Cluster analysis
3.4Sampling strategies
3.5Evaluation of core collection
4 Results
4.1Phenotypic values for 26 rice quality traits
4.2Predicted genotypic values for 26 rice quality traits
4.3Trend of core collection at increasing sample proportion
4.4Development of 24 core collections
4.4.1 Core development procedure
4.4.2 Dendrograms for 24-core collections based on hierarchical cluster methods and sampling strategies(1)
4.4.2 Dendrograms for 24-core collections based on hierarchical cluster methods and sampling strategies(2)
4.5Comparison of core collections at different sampling proportion
4.5.1 Comparison of core collection at 10％, 15％ and 20％
4.5.2 Analysis of the different cluster methods
4.5.3 Comparison of core collection with initial collection for traits
5 Discussion
5.1Gemplasm genetic resource
5.2Core collections approaches and sampling strategies
5.3Sample size and cluster methods
5.4NIRS quality trait analysis
6 References
7 Appendix
