Figure 8.—

Marginal posterior probability distributions from coalescent simulations of the demographic history of Eichhornia paniculata. (A) Simulated estimates of diversity (θ = 4N_eμ) in populations from Brazil, the Caribbean, and their common ancestor represented by dotted, dashed, and solid lines, respectively. (B) Time (in annual generations) since divergence between Brazilian and Caribbean populations estimated using the average mutation rate of grass ADH sequences μ = 6.5 × 10⁻⁹. All curves were estimated using the program MIMAR (Becquet and Przeworski 2007), which implements coalescent simulations in a Bayesian framework. The mode for each distribution is labeled above each curve.