Zadoks - Disease resistance in cocoa 1997 February 2, 1997 DISEASE RESISTANCE TESTING IN COCOA A review on behalf of FAO/INGENIC J.C. Zadoks, consultant do Department of Phytopathology P.O.Box 8025 6700 EE Wageningen The Netherlands private fax + 31 - 317 - 48 34 12 fax + 31 - 317 - 42 36 14 e-mail Jan Carel
[email protected] [email protected] - (hoi o Zadoks - Disease resistance in cocoa 1997 TABLE OF CONTENTS 0. Executive summary 1. Introduction 1.1. INGENIC 1.2. Objectives of the review 1.3. Procedure 2. Background information. The host plant 2.1. Origin 2.2. Agronomy 2.3. Genetics 2.4. Breeding 2.5. Pre-breeding 2.6. Conclusions and recommendations 3. Background information. The pathogens 3.1. Taxonom ic cons iderations 3.2. Subspecific variation 3.3. Selected pathogens 3.4. General comments 4. Resistance testing 4.1. Resistance, tolerance and escape 4.2. Components of resistance 4.3. Host-parasite interactions 4.4. Methods of resistance testing 4.5. Predictive tests 4.6. Resistance tests in campo 4.7. Resistance tests in vivo 4.8. Biochemical and molecular tests 4.9. International aspects of resistance testing 5. Resistance 5.1. Past and present situation of resistance breeding 5.2. Breeding objectives 5.3. Results with selected pathogens 5.4. Molecular techniques 5.5. General comments 5.6. Conclusions 2 Zadoks - Disease resistance in cocoa 1997 6. International cooperation 6.1. Organizational aspects 6.2. Needs 6.3. Pre-breeding 6.4. Preliminaries to implementation 6.5. Quality standards 6.6. Recommendations 7.