Abstract:
Melia volkensii is a popular multipurpose tree species in Kenya’s arid and semi arid lands (ASALs). The
species has been overexploited in the recent past leading to erosion of genetic diversity. The aim of this
study therefore was to assess the levels and distribution of genetic diversity of selected Kenyan
populations. Nine populations were analyzed using random amplified polymorphic DNA (RAPD) markers.
The levels of genetic diversity were low (H = 0.0663 to 0.1372). The populations were differentiated into
two groups, eastern and coastal regions, which are also distinguished by eco-climatic conditions. The
groups were also subdivided into farmland and natural populations. Higher genetic diversity was found
within farmland (H = 0.1075) than in natural populations (H = 0.0690). The analysis also revealed that
more variation (75.4%) existed within populations. The genetic differences observed between the regions
and at sub-regional level (farmland versus natural populations) constitute important units, which should be
considered for conservation, improvement and sustainable utilization of the species.
