Eggplant is prone to attack by several pests including bacteria, fungi, nematodes and insects. In this study, we have analyzed phylotype of bacterial wilt (Ralstonia solanacearum) infection in eggplant plants collected from Bhubaneswar (Orissa) in India. Bacterial wilt symptomatic five plant samples were collected from brinjal field in Bhubaneswar in 2016. The samples were macerated in sterile distilled water and grown on Kelman’s triphenyltetrazolium chloride (TZC) agar media. Total genomic DNA of the bacterium were extracted and subjected to PCR amplification using the R. solanacearum specific universal primer pair 759/760. An expected single 280 bp fragment amplified in all the samples confirmed the identity of these as Ralstonia. To reconfirmed isolate of bacterium, the amplicon was sequenced in sequencer. In NCBI blast, the nucleotide sequence was 100% similar with Ralstonia solanacearum strain RS-lpxC-DOB-1 (AB910593) and the sequence was submitted in NCBI database under Acc. No. KY393266. To determined phylotype of strain used specific multiplex PCR with phylotype specific primers (Nmult: 21F1/2, Nmult: 22InF, Nmult: 23AF, Nmult: 22RR) revealed that all the five infected samples belonged to phylotype I as a 144-bp amplicon were observed in agarose gel. On the basis of above finding concluded that the bacterial wilt infected eggplant collected from Bhubaneswar was Ralostonia solanacearum, Phylotype I.
Eggplant, bacterial wilt, Phylotype
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