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Comparative transcriptome analysis reveals host-associated differentiation in Chilo suppressalis (Lepidoptera: Crambidae).


ABSTRACT: The striped stem borer, Chilo suppressalis Walker (Lepidoptera: Crambidae), is one of the most serious rice pests. Besides attacking rice, it also feeds on an economically important vegetable crop, water-oat Zizania latifolia. The species feeding on water-oat has higher growth and survival rate than those on rice, suggesting their success in adaptation to the new host plant. However, little is known about the molecular mechanisms of host plant adaptation. Here we investigated the midgut transcriptome responses of C. suppressalis larvae reared on rice and water-oat. A total of 1,633 differentially expressed genes were identified, with a greater number up-regulated on the more delicious new host. The up-regulation of most digestive and detoxification-related genes may be the result of adaptation to the changes in nutritional requirements and toxic chemicals during host shift. In contrast, down-regulation of ribosomal genes may be related to their better development performance when feeding on the new host. In conclusion, our results suggest that transcriptional regulation of genes related to digestion, detoxification and ribosome may play an important role in adaptation of C. suppressalis to a new host plant.

PROVIDER: S-EPMC5653757 | BioStudies |

REPOSITORIES: biostudies

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