Contents 1The Concept and Research Progress of Quantitative Traits 1 1.1History of Molecular Quantitative Genetics 1 1.2Concept and Genetic Characters of Quantitative Traits2 1.3Tools for Quantitative Trait Studies3 1.3.1Types of Molecular Markers4 1.3.2Applications of Molecular Markers4 1.4Progress and Prospect of QTL Mapping6 1.4.1Methods of QTL Mapping6 1.4.2QTL Mapping Progress6 1.4.3Application Prospects of QTL Mapping9 References 11 2 Genetic Analysis Methods of Quantitative Traits in Wheat13 2.1The Types and Quality of Genetic Populations 13 2.1.1The Types of Genetic Populations 13 2.1.2Genetic Population Construction and Some Key Notes to Consider19 2.1.3Quality of Genetic Populations24 2.2Types and Applications of Genetic Markers26 2.2.1Morphological Markers26 2.2.2 Cytological Markers26 2.2.3Biochemical Markers27 2.2.4DNA Molecular Markers27 2.3Statistical and Mapping Method of Quantitative Traits31 2.3.1The Principle of QTL Mapping31 2.3.2Methods of QTL Mapping32 2.4New Methods of QTL Mapping35 2.4.1Conditional QTL35 2.4.2eQTL Mapping Method36 2.4.3QTL Mapping Methods of New Gene Mining Germplasm37 References38 3 Construction of Molecular Genetic Map of Wheat41 3.1Genetic Map and Construction Methods43 3.1.1Concept of Genetic Map43 3.1.2Construction Methods of Genetic Map43 3.2Genetics Map Construction44 3.2.1Genetic Map Construction Using DH Population Derived from Huapei3 x Yumai57 44 3.2.2Genetic Map Constructed Using RIL Population Derived from Nuomai I x Gaocheng 8901 52 3.2.3Genetic Map Constructed Using RIL Population Derived from Shannong 01-35 x Gaocheng 9411 59 3.2.4High-Density Genetic Linkage Map Constructed Using SNP Markers and Others Markers66 3.2.5High-Density Genetic Linkage Map Constructed Using SNP Markers in Natural Population70 3.2.6Genetics Map Constructed Using a Wheat Backbone Parent