Genotype x Environment Interactions - Challenges and Opportunities for Plant Breeding and Cultivar Recommendations



Paolo Annicchiarico
Senior Scientist
Instituto Sperimentale per le Colture Foraggere
Lody, Italy

Rome, 2002

Table of Contents

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The reference to the different computer software programs included in sections 4.5, 5.9 and 7.3 of this publication is for information purposes only. The choice of items does not constitute an endorsement by FAO of the manufactures of these computer software products or of the products themselves

ISBN 92-5-104870-3

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© FAO 2002

Table of Contents



List of abbreviations

1. Introduction

1.1 Background
1.2 Genotype and environment
1.3 Elements of a breeding strategy

2. Adaptation and yield stability

2.1 Analysis of adaptation
2.2 Definition of adaptation strategies
2.3 Wide vs. specific adaptation in breeding programmes
2.4 Targeting varieties
2.5 Assessment of yield stability and reliability
2.6 Two analytical flow charts

3. Multi-environment yield trials

3.1 Types of trials and requirements of the generated information
3.2 Additional information on environmental factors and genotypic traits

4. Analysis of variance (ANOVA) and estimation of variance components

4.1 Models of ANOVA
4.2 Estimation of individual effects and comparison of means
4.3 Estimation of variance components
4.4 Data transformation
4.5 Computer software

5. Analysis of adaptation and identification of subregions

5.1 Objectives of the analysis
5.2 Joint linear regression modelling and complementary analyses
5.3 AMMI modelling and complementary analyses
5.4 Factorial regression modelling and complementary analyses
5.5 Pattern analysis
5.6 Data transformation
5.7 Unbalanced data sets
5.8 Characterization of subregions and scaling-up of results
5.9 Computer software

6. Definition of adaptation strategy, selection environments, genetic resources and adaptive traits

6.1 Adaptation strategy
6.2 Selection environments
6.3 Genetic resources and adaptive traits

7. Measures of yield stability and reliability

7.1 Yield stability
7.2 Yield reliability
7.3 Computer software

8. Case study: durum wheat in Algeria

8.1 Experiment data
8.2 Adaptation strategy and yield stability targets for breeding
8.3 Cultivar recommendation


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