Soil Mineral Stresses Approaches to Crop Improvement [Paperback]

1 Introduction: World Population and Agricultural Productivity.- 1.1 How Many People Are There?.- 1.2 Agricultural Requirements.- 1.2.1 Food Requirements.- 1.2.2 Food Supply.- 1.3 Population-Carrying Capacity.- 1.4 How Much Land Is There?.- 1.5 Increasing Food Production.- References.- 2 Conventional Plant Breeding for Tolerance to Problem Soils.- 2.1 Screening Techniques.- 2.2 Variability in Tolerance for Soil Stresses.- 2.2.1 Rice.- 2.3 Genetics of Tolerance for Soil Stresses.- 2.3.1 Gene Location and Linkages.- 2.3.2 Correlated Changes.- 2.4 Crop-Improvement.- 2.4.1 Introduction.- 2.4.2 Pure Line and Mass Selection.- 2.4.3 Hybridisation and Selection.- 2.4.3.1 Pedigree Method.- 2.4.3.2 Bulk Method.- 2.4.3.3 Backcross Breeding.- 2.4.3.4 Recurrent Selection.- 2.4.3.5 Rapid Generation Advance Procedures.- 2.4.4 Mutation Breeding.- 2.4.5 Polyploid Breeding.- 2.4.6 Heterosis Breeding.- 2.5 Summary.- References.- 3 Physiological Criteria in Screening and Breeding.- 3.1 Introduction.- 3.2 Reasons for the Use of Physiological Selection.- 3.2.1 The Complexity of Tolerance.- 3.2.2 Importing Tolerance from Wild Relatives.- 3.2.3 Measuring Stress Tolerance.- 3.2.4 Interaction Between Environmental Stresses.- 3.2.5 Limitations to the Use of Yield as a Selection Criterion.- 3.3 Salinity.- 3.3.1 Basic Problems.- 3.3.2 Salt Exclusion.- 3.3.3 Conditions Requiring Osmotic Adjustment.- 3.3.4 Characteristics Needed in Salt-Tolerant Plants.- 3.3.4.1 Control of Salt Uptake.- 3.3.4.2 Limiting the Damage That Excessive Ion Uptake Causes.- 3.3.4.3 Osmotic Adjustment.- 3.3.5 Agricultural Versus Ecological Advantage.- 3.3.6 Examples Where Knowledge of Physiological Mechanisms Would Aid Selection for Salt Tolerance.- 3.3.6.1 Where Tolerance Is Accidental.- 3.3.6.2 Where Tolerance Is Not a Single Character.- 3.3.6.3 Where Tolerance Is Incidental.- 3.3.6.4 Where a Mechanism Is As Important As Tolerance Itself.- 3.3.6.5 Where Screening/Selection Pressure Is Severe.- 3.4 Drought.- 3.4.1 EfficielC+