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Development and Evolutionary Constraints in Animals
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DOI：10.1146/annurev-ecolsys-110617-062339.png)
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We review the evolutionary importance of developmental mechanisms in constraining evolutionary changes in animals-in other words, developmental constraints. We focus on hard constraints that can act on macroevolutionary timescales. In particular, we discuss the causes and evolutionary consequences of the ancient metazoan constraint that differentiated cells cannot divide and constraints against changes of phylotypic stages in vertebrates and other higher taxa. We conclude that in all cases these constraints are caused by complex and highly controlled global interactivity of development, the disturbance of which has grave consequences. Mutations that affect such global interactivity almost unavoidably have many deleterious pleiotropic effects, which will be strongly selected against and will lead to long-term evolutionary stasis. The discussed developmental constraints have pervasive consequences for evolution and critically restrict regeneration capacity and body plan evolution.
Keyword:
evo-devo
body plan evolution
evolutionary constraint
parthenogenesis
phylotypic stages
regeneration capacity
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