BIOL3044 Lecture Notes - Lecture 23: Reaction Norm, Zygosity, Harmonic Mean
Document Summary
Temporal variation: one environmental variation occurring after another. Spatial variation: different sets of environmental conditions are found in different geographic locations. Graph shows 2 reaction norms where each population has high fitness in one environment and is strongly selected against in another environment. Red reaction norm genotype: has high fitness in environment 1, and 0 fitness in environment 2. It has much higher fitness than blue reaction norm population in environment 1. Blue reaction norm genotype: still is a specialist has a selective advantage in environment 2: has a much lower fitness in environment 1 than environment 2 so it is selectively favoured in environment 2. Green reaction norm genotype: a relatively flat reaction norm that maintains a moderate fitness in both environments: roughly equal fitness in both environments it doesn"t do particularly well in 1 or particularly bad in the other. In a heterogenous environment: a mix of environment 1 and 2.
