Equation 4 · Part 1 · Comparing the Main Approaches to Evolutionary Biology and Ecology
Symbol p_t
What this part means
is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol p_t→Article meaning
The passage around this formula
The equation exposes the model’s real content: selection is strongest while the favored allele is at intermediate frequency, where is largest, and weakens automatically as the allele nears fixation or loss, purely from the algebra of the denominator — a pattern of decelerating change that shows up empirically in both the Grants’ beak-size tracking and the LTEE’s fitness trajectories, even though the two systems differ in essentially everything else about how the selection coefficient s itself is generated.
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the article section
- [3] E. coli long-term evolution experiment ↗
- [4] Historical contingency and the evolution of a key innovation in an experimental population of Escherichia coli ↗
These citations provide research context; check each source for the exact claim it supports.