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Transcriptome differential co‐expression reveals distinct molecular response of fall‐armyworm strains to DIMBOA

Taking advantage of the recent publication from our group applying network analyses, I would like to present a last year publication in the Pest Management Science journal. 

We evaluated differential expression in the transcriptome of both midgut and fat body larval tissues of the two strains of the FAW reared on either DIMBOA‐enriched artificial diet or control diet and inferred Bayesian networks. We found differences in performance between corn and rice strain larvae reared on DIMBOA, as well as several differentially regulated contigs annotated as esterases, peptidases, transferases and reductases, all of them known for being related to responses of lepidopterans and other insects to DIMBOA. We also found a UDP‐glucuronosyltransferase very similar to others found in many lepidopterans occupying a central hub within a transferase Bayesian network, suggesting that it is essential to an effective response to DIMBOA in FAW. Our results suggest that there is an intrinsic cost for FAW rice strain larvae to metabolize corn‐originated hydroxamic acids, which could have resulted in the partial host‐associated genetic isolation found at FAW field populations.

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