Conclusion
The genus Citrullus includes seven species that may originate from different parts of the world, according to previous and current data. Our results reveal 38 distinct chloroplast haplotypes amongCitrullus spp. and the distribution of those haplotypes across the world. The close relationship of egusi melon and Kordofan melon to watermelon raised new questions regarding the colonization routes of major crops and the current status of extant genetic diversity of wild relatives in places of origin.