at 94 oC for one min, annealing at 55 oC for one
min, and elongation at 72 oC for one min, and final
elongation at 72 oC for five min. The sequences
were identified by using BLAST with similarity less
than 100% to be published sequences in GenBank.
Identifying rhizobacteria with inhibitory
capability
The inhibitory capability of rhizobacteria
against mycelial growth of the isolates (Pythium
sp.) was tested using the dual culture technique.
The percentage of inhibition of the mycelial growth
was calculated from the distance of inhibition zone
after it was incubated for 30 h at 28 oC.
Regarding the preparation, each isolate was
grown on PDA for 30 h at 28 oC, while rhizobacteria
was grown on NA for 24 h at 28 oC. Each isolate
of rhizobacteria was streaked on PDA media with a
distance about four cm to the Pythium isolate and
the PDA plate was subsequently incubated at 28
oC in dark conditions. The distance between each
inoculated strain of rhizobacteria and each isolate
of Pythium was recorded. The efficacy of inhibition
was calculated using the following formula (1):