Riyadh A. Basahi, Fahad Alzuaibr, Mohammed A. Basahi, Molecular Phylogeny Using ISSR Analysis in Naturally Growing Suaeda Populations in Saudi Arabia, Research Journal of Applied Sciences, Volume 13,Issue 11, 2018, Pages 686-691, ISSN 1815-932x, rjasci.2018.686.691, (https://makhillpublications.co/view-article.php?doi=rjasci.2018.686.691) Abstract: The aim of the present study was to assess the genetic diversity of different Suaeda populations collected from Saudi Arabia using Inter Simple Sequence Repeat (ISSR). Seventeen ISSR primers yielded a reproducible banding pattern, the number of polymorphic bands per primer varied between 5 and 14 with a mean of 8 major bands per primer. UPGMA cluster analysis revealed three distinct clusters; The first cluster comprised Suaeda maritime populations, the second cluster comprised Suaeda vermiculata populations and the third cluster comprised Suaeda aegyptiaca populations. The present findings showed clear differences between plant species but no significant differences were observed among geographical distribution. Keywords: Saudi Arabia;ISSR;UPGMA;cluster;species;Suaeda maritime