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. 2010 Jun 10;6(6):e1000811. doi: 10.1371/journal.pcbi.1000811

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O'Dea et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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In the neutral-staircase fitness landscape, the maximum neutrality increases as the number of active blocks increases. The expected time, in generations, for the number of active blocks to go from one to a maximum number of 20 is plotted using Equation (8). The curves in each panel, from lowest to highest, correspond to the number of between-block bits being 2, 4, 6, and 8. The curves for the lowest barrier can be fairly flat because fixation probabilities become the rate-limiting factors. Parameters: number of bitpairs per block , reproductive capacity .

Inline graphic — In the neutral-staircase fitness landscape, the maximum neutrality increases as the number of active blocks increases. The expected time, in generations, for the number of active blocks to go from one to a maximum number of 20 is plotted using Equation (8). The curves in each panel, from lowest to highest, correspond to the number of between-block bits being 2, 4, 6, and 8. The curves for the lowest barrier can be fairly flat because fixation probabilities become the rate-limiting factors. Parameters: number of bitpairs per block , reproductive capacity .