Abstract
The bioinformatics tool NovoMIR was used to predict miRNAs in Musa acuminata genome. NovoMIR predicted 85 pre-miRNAs from the 11 chromosomes of Musa acuminata DH Pahang and BLAST analysis of the predicted pre-miRNAs against annotated miRNAs of miRBase identified 52 mature miRNAs belonging to 38 different families. psRNATarget server identified 124 protein-coding sequences as potential targets for 40 mature miRNAs. Based on the role of the target genes in biological processes related to biotic stress, five miRNAs were selected for analyzing their response to Banana bract mosaic virus (BBrMV) infection. Three-month-old in vitro raised banana plants of var. Nendran (Musa AAB) infected with BBrMV showed the presence of all the five selected miRNAs in both healthy and BBrMV infected plants. Expression analysis using RT-qPCR showed changes in the expression of miR-3900-5p, miR-2172-5p, miR-6928-5p and miR-971-5p and their targets during BBrMV infection.
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