Figure 3

Genetic structure of 13 Rhizophora mucronata populations in the Western Indian Ocean region. Each vertical line represents an individual to which genetic clusters are assigned. Structure bar plot considering three (K3) and four (K4) genetic clusters according to the Delta K estimation and considering eleven groups (K11) according to LnPK. These analyses indicate a separate genetic cluster for the remote islands of Aldabra (ALD1, ALD2) and Madagascar (MAD1, MAD2) although the most remote Seychelles population (SEY) appear less differentiated from those on the African coastline. Undoubtedly, a larger allelic diversity of East African populations (KEN and TAN) caused their separated gene pool. R. mucronata populations of the Mozambique Channel belong to a well-mixed gene pool. K11 subdivided gene pools of K4, except for East Africa. Population codes are denoted in Table 1.