Definition of the Subject
The existence of genotype by environment interaction (G×E) makes animal breeding more complicated. It means that the same genotype is not the best in all environments, and it implies that separate breeding programs might be needed to cater for these different environments. However, separate (and therefore, smaller) breeding programs might be less efficient than one large program. Small breeding programs might also encounter problems with inbreeding depression, but on the other hand, several populations with different breeding programs and breeding goals might increase the overall genetic diversity. Therefore, G×E is an important factor to consider when creating breeding programs for animals, especially in a global setting.
Introduction
The ability to respond to changes in the environment is a vital characteristic of all organisms. This ability is called phenotypic plasticity or sometimes, environmental sensitivity...
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Abbreviations
- Genotype by environment interaction:
-
It exists when the difference between the phenotypic values of two genotypes is not the same in two environments.
- Plasticity:
-
The ability of an individual to respond to changes in the environment.
- Reaction norms:
-
The phenotypic expression of a genotype as a function of the environment.
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Strandberg, E. (2013). Animal Genetic in Environment Interaction. In: Christou, P., Savin, R., Costa-Pierce, B.A., Misztal, I., Whitelaw, C.B.A. (eds) Sustainable Food Production. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5797-8_343
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