Tropical Root and Tuber Crops: Cassava, Sweet Potato, Yams, Aroids

CONTENTS......Page 6
ACRONYMS AND ABBREVIATIONS......Page 14
PREFACE......Page 16
SECTION I: CASSAVA......Page 22
Domestication......Page 24
Discovery of the Crop by Western Explorers......Page 28
Present Geographical Distribution......Page 30
Classification......Page 34
Morphological Description of M. esculenta Crantz......Page 35
Related Species......Page 39
Cytology......Page 40
Objectives and Selection Criteria......Page 42
Sexual Reproduction and Sterility......Page 43
Crossing Techniques and True Seed Production......Page 44
Selection Methods and Programmes......Page 46
Heritability of Major Traits......Page 49
Genotype × Environment Interactions......Page 52
Use of Related Species......Page 53
Rapid Vegetative Propagation......Page 54
Use of Molecular Markers......Page 56
Transgenic Technologies......Page 57
Germplasm Conservation......Page 58
Growth Cycle......Page 60
Temperature......Page 65
Nutrition......Page 66
Water Deficit and Stress......Page 67
Yield Potential......Page 68
Soil Preparation......Page 70
Propagule Selection and Preparation......Page 71
Plant Densities and Crop Establishment......Page 73
Intercropping......Page 75
Weeding......Page 77
Fertilization and Nutrient Disorders......Page 78
Harvesting......Page 81
Pests......Page 84
Bacteria......Page 88
Fungi......Page 90
Viruses......Page 92
Integrated Pest and Disease Management......Page 96
Chemical Composition......Page 98
Physiological Disorders in Freshly Stored Roots......Page 99
Marketing and Quality Standards......Page 101
Storage Methods......Page 102
Traditional Processing Techniques......Page 104
Industrial Processing......Page 106
SECTION II: SWEET POTATO......Page 110
Domestication......Page 112
Discovery of the Crop by Western Explorers......Page 114
Present Geographical Distribution......Page 118
Morphological Description of Ipomoea batatas (L.) Lam......Page 120
Related Species......Page 123
Cytology......Page 125
Objectives and Selection Criteria......Page 128
Sexual Reproduction, Incompatibility and Sterility......Page 129
Crossing Techniques and True Seed Production......Page 131
Selection Methods and Programmes......Page 132
Heritability of Major Traits......Page 136
Genotype × Environment Interactions......Page 139
Use of Related Species......Page 140
Rapid Vegetative Propagation......Page 141
Use of Molecular Markers......Page 143
Transgenic Technologies......Page 144
Germplasm Conservation......Page 146
Growth Cycle......Page 148
Photoperiodism......Page 151
Temperature......Page 152
Nutrition......Page 154
Water Deficit and Stress......Page 155
Yield Potential......Page 157
Soil Preparation......Page 160
Propagule Selection and Preparation......Page 161
Plant Densities and Crop Establishment......Page 163
Intercropping......Page 164
Weeding......Page 165
Fertilization and Nutrient Disorders......Page 166
Harvesting......Page 170
Pests......Page 172
Nematodes......Page 177
Bacteria......Page 179
Fungi......Page 181
Viruses......Page 184
Integrated Pest and Disease Management......Page 186
Chemical Composition......Page 188
Marketing and Quality Standards......Page 192
Storage Methods......Page 193
Traditional Processing Techniques......Page 195
Industrial Processing......Page 198
SECTION III: YAMS......Page 202
Domestication......Page 204
Discovery of the Crop by Western Explorers......Page 208
Present Geographical Distribution......Page 209
Classification......Page 212
Morphological Description of Major Cultivated Dioscorea spp.......Page 214
Related Species......Page 227
Cytology......Page 228
Objectives and Selection Criteria......Page 232
Sexual Reproduction and Sterility......Page 234
Crossing Techniques and True Seed Production......Page 235
Selection Methods and Programmes......Page 237
Heritability of Major Traits......Page 239
Genotype × Environment Interactions......Page 240
Use of Related Species......Page 241
Rapid Vegetative Propagation......Page 242
Use of Molecular Markers......Page 244
Transgenic Technologies......Page 246
Germplasm Conservation......Page 247
Growth Cycle......Page 250
Photoperiodism......Page 253
Nutrition......Page 256
Water Deficit and Stress......Page 257
Yield Potential......Page 258
Soil Preparation......Page 260
Propagule Selection and Preparation......Page 262
Plant Densities and Crop Establishment......Page 264
Weeding......Page 267
Fertilization and Nutrient Disorders......Page 269
Harvesting......Page 271
Pests......Page 274
Nematodes......Page 275
Fungi......Page 277
Viruses......Page 281
Integrated Pest and Disease Management......Page 284
Chemical Composition......Page 286
Physiological Disorders in Freshly Stored Tubers......Page 289
Marketing and Quality Standards......Page 290
Storage Methods......Page 291
Traditional Processing Techniques......Page 293
Industrial Processing......Page 295
SECTION IV: AROIDS......Page 298
Domestication......Page 300
Discovery of the Crop by Western Explorers......Page 302
Present Geographical Distribution......Page 303
Classification......Page 306
Morphological Descriptions of Major Aroids......Page 307
Cytology......Page 319
Objectives and Selection Criteria......Page 322
Sexual Reproduction and Sterility......Page 323
Crossing Techniques and True Seed Production......Page 324
Selection Methods and Programmes......Page 327
Heritability of Major Traits......Page 329
Genotype × Environment Interactions......Page 330
Polyploidy Breeding......Page 332
Rapid Vegetative Propagation......Page 333
Use of Molecular Markers......Page 334
Germplasm Conservation......Page 336
Growth Cycle......Page 340
Photoperiodism......Page 343
Temperature......Page 344
Nutrition......Page 345
Water Deficit and Stress......Page 346
Yield Potential......Page 347
Soil Preparation......Page 350
Propagule Selection and Preparation......Page 351
Plant Densities and Crop Establishment......Page 352
Weeding......Page 354
Fertilization and Nutrient Disorders......Page 355
Harvesting......Page 357
Pests......Page 360
Nematodes......Page 363
Fungi......Page 364
Viruses......Page 369
Integrated Pest and Disease Management......Page 370
Chemical Composition......Page 372
Marketing and Quality Standards......Page 375
Storage Methods......Page 376
Traditional Processing Techniques......Page 378
Industrial Processing......Page 379
REFERENCES......Page 382
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