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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Distinguishing migration from isolation using genes with intragenic recombination: detecting introgression in the Drosophila simulans species complex

Figure 2

Proportion of significant tests in simulated data. 14,000 coalescent simulations, over the whole range of genetic differentiation, were performed for each model: isolation (I, black), migration (M, red), unidirectional migration (UM, dark blue), isolation with migration (IM, orange), isolation with unidirectional migration (IUM, pale blue) and a single panmictic population (P, yellow; note that this line is limited to low values of D and thus is missing in panel A). Continuous lines indicate the proportion of significant tests for the models with presence of migration (for R statistics) or presence of unidirectional migration from P2 to P1 (for W statistics), i.e. they indicate the power of the test (dark and pale blue orange continuous lines have unidirectional migration from P2 to P1). Dotted lines indicate the proportion of significant tests under the models without migration (for R statistics) or without migration from P2 to P1 (for W statistics), i.e. they indicate the false positive rate (dark and pale blue dotted lines have unidirectional migration from P1 to P2). Proportion of significant tests is estimated as a function of the level of differentiation measured by D[35]. A. R F statistic, B. R S statistic, C. W x1s2 Statistic.

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