Nutritional insights on adaptation

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Table of contents

GENERAL PRESENTATION
Chapter 1: INTRODUCTION
1 Context of the thesis
2 On the relation between genetic improvement and herd environments
2.1 Success of adapting herd environments to improved genotypes
2.2 Environmental limits and challenges emerging in the context of genetic improvement
2.3 Selection adjustments for matching genotypes to herds environments
2.4 Nutritional insights on adaptation
2.5 Modeling as a tool for dealing with complexity
3 Managing G × E interactions at the herd level
3.1 The resource allocation approach
3.2 Herd management: a possible lever to alleviate trade-offs among traits
3.3 Interest for the design of sustainable systems
4 Research question and case study
Chapter 2: GENERAL APPROACH
1 EXPLAIN: development of a herd simulation model
1.1 Model overview
1.2 Animal sub-model of resource acquisition – allocation
2 DESCRIBE: a time-profile of dairy goat performance
2.1 Model calibration on a meta-profile
2.2 Description of extended lactation from real data
3 EXPLORE: Simulation experiments
3.1 Description of G and E in the scenarios
3.2 Scenario simulated of G × E
Chapter 3: RESULTS
1 Exploring different selection strategies in an abundant environment
1.1 Contrasted strategies tailored different resource allocation
1.2 Consequences of a varying manager􀇯s priority for milk production efficiency
2 Description of extended lactation (EL)
3 Exploration of selection strategies allowing for the use of EL in a variable environment
Chapter 4: DISCUSSION
1 An application of the resource allocation approach to the herd context
1.1 Outcomes from the resource allocation approach
1.2 The desired resource intake
1.3 Environmental variability reveals the evolutionary importance of body reserves
1.4 Extended lactation as an animal tactic to deal with the cost of reproduction
1.5 Implications for the management of G × E: from constraints to opportunities
2 The framework
2.1 The emergence of G × E interactions at the herd level
2.2 Management influences in the local herd environment
2.3 Distinguish the selection practice from the selection action
2.4 Model limitations and evaluation
3 Future prospects
3.1 Towards a generic model to manage G × E interactions: the problem of estimating the 􀇮c􀇯 allocation components
3.2 Scale issue for the design of sustainable management systems
3.3 Towards another research approach iteration: describe the herd environment and explain its dynamic