LAUSR

| The ticks (Hyalomma dromedarii) are significant disease transmit vectors to camel in Saudi Arabia. They transfer a range of pathogens such as bacteria, protozoa and viruses to people and animals. Their significance as a malady vector requires dependable molecular technique in the present research, the genetic variability of H. dromedarii from six farms located in Taif governorate of Saudi Arabia were investigated by using ISSR marker technique. Eight ISSR markers were chosen to deliver clear and reproducible polymorphic loci. The genetic variability within and among all samples of H. dromedarii were investigated via these markers. A total of 102 DNA loci were produced. Out of these loci, 63 were with ratio of 61.8%. The number of total bands varied from 8 to 16 bands, and the bands size ranging from 120 to 2100 bp. By using Neighbor-joining genetic distance method, the 12 samples were assembled into two main group with 0.56 genetic similarity. The first group contains two samples, number 2 and 11, from different farm. The other ten samples are located in second group which divided into two clusters. The value of genetic similarity varied from 0.877 for two samples, tick-9 and tick-12 to a lowest value of 0.056 for samples tick-3 and tick-11. The present data indicates that there is no remarkable correlation between the geographic distance and genetic similarity.