Cucurbits

Y.-H. Wang, T. Joobeur, R. A. Dean, J. E. Staub 315

10.1 Introduction 315

10.1.1 Origin and Botany 315

10.1.2 Cucurbit Production 316

10.2 Genetic Mapping of Cucurbit Genomes 317

10.3 Genetic Mapping of Mendelian Traits 319

10.3.1 Fusarium Wilt Resistance 319

10.3.2 Mapping of Other Resistance Genes 320

10.3.3 Fruit/Flower Traits 320

10.4 Genetic Mapping of Quantitative Traits 320

10.5 Marker-Assisted Selection (MAS) 321

10.6 Map-Based Cloning 322

10.7 Cucurbit Genetic Engineering 322

10.8 Future Prospects 324

References 324

11 Onion

J. McCallum 331

11.1 Introduction 331

11.1.1 Taxonomy and History 331

11.1.2 Genetic Resources and Breeding 331

11.1.3 Cytology and Genome Structure 333

11.2 Molecular Markers and Other Genome Resources 333

11.2.1 Protein Markers 334

11.2.2 RAPD and AFLP Markers 334

11.2.3 Expressed Sequence, SSR and SNP Markers 334

11.2.4 BAC Resources 335

11.2.5 Genomic SSR Markers 335

11.3 Genetic Mapping 335

11.3.1 Inter-and Intraspecific Maps 335

11.3.2 Other Map and Marker Resources 335

11.4 Phenotypic Variation and Economic Traits 336

11.4.1 Adaptation and Bulb Quality 336

11.4.2 Carbohydrate Composition 336

11.4.3 Organosulfur Compounds 336

11.4.4 Pigmentation 337

11.4.5 Human Health Benefits 337

11.4.6 Pest and Disease Susceptibility 337

11.5 Genetic and QTL Analysis of Economic Traits 338

11.5.1 Bulb Pigmentation 338

11.5.2 Male-Fertility 338

11.5.3 Bulb Carbohydrate Composition 339

11.5.4 Bulb Pungency 341

11.6 Conclusion 342

References 342

12 Garlic

12.1 Introduction 349

12.1.1 Center of Origin, Spread and Domestication 349

12.1.2 Taxonomy 350

12.1.3 Habitat 351

12.1.4 Economic Importance 351

12.1.5 Morphology 352

12.1.6 Genome Size and Karyotype 353

12.1.7 Nutritional Composition and Nutraceutical Value 353

12.1.8 Organosulfur Constituents 354

12.2 Garlic Breeding and Construction of the First Genetic Maps 354

12.3 Mapping Gene-Specific Markers 358

12.4 BAC Libraries and Physical Mapping 359

12.5 Genome Organization in Garlic 359

12.6 Interspecific Hybrids 360

12.7 Genetic Transformation 360

12.8 Progress of Garlic Breeding and Future Scope of Works 360

References 361

Subject Index 365

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