Site-Specific Insertion Polymorphism of the MITE Alex-1 in the Genus Coffea Suggests Interspecific Gene Flow

Figure 4

Insertion polymorphism of the MITE Alex-1 superimposed to a phylogenetic tree established by Maurin et al. [13]. Except for the species from the Indian Ocean islands, which are homozygous −/−, all possible allelic associations are found on the African continent despite the geographical region, West or East. *: C. arabica is the sole tetraploid Coffea species. WA: West and Central Africa, Mad: Madagascar, Com: Comoros, Mau: Mauritius, EA: East Africa. All the species analyzed in the present study are not represented on the tree and reciprocally.