Abstract

Molecular markers have been found useful in assessing the genetic diversity in a precise manner, which is based on naturally occurring DNA polymorphism. Random Amplified Polymorphic DNA analysis was performed using four arbitary decamer primers to observe genetic homogeneity/ polymorphism among 10 isolates of fluorescent Pseudomonas spp. isolated from apple and pear rhizosphere from different locations of Mandi and Chamba districts. Out of 52 bands generated with 4 RAPD primers, 13.46% were monomorphic bands, while 86.33% were polymorphic bands. The result showed that the isolates of fluorescent Pseudomonas sp. were divided into 2 clusters by RAPD primers. Among all the combinations maximum similarity (90.48%) was found between PN-7-Cha and PN-2-San isolates of Chamba and Mandi districts. However, minimum similarity (36.7%) was observed in PN-11-San and PN- 7-Cha isolates of Mandi and Chamba districts. This technique is highly beneficial for testing similarity analysis among fluorescent Pseudomonas spp. isolated from different locations.

Keywords: PGPR, Fluorescent Pseudomonas, RAPD