Adaptation by the brown planthopper to resistant rice: A test of female-derived virulence and the role of yeast-like symbionts

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dc.creatorHorgan, Finbarr G.
dc.creatorCruz, Ainara Peñalver
dc.creatorArida, Arriza
dc.creatorFerrater, Jedeliza B.
dc.creatorBernal, Carmencita C.
dc.date2021-10-06
dc.date2024-12-19T12:53:35Z
dc.date2024-12-19T12:53:35Z
dc.date.accessioned2026-06-27T04:13:06Z
dc.descriptionThe adaptation by planthoppers to feed and develop on resistant rice is a challenge for pest management in Asia. We conducted a series of manipulative experiments with the brown planthopper (Nilaparvata lugens (Stål)) on the resistant rice variety IR62 (BPH3/BPH32 genes) to assess behavioral and bionomic changes in planthoppers exhibiting virulence adaptation. We also examined the potential role of yeast-like symbionts (YLS) in virulence adaptation by assessing progeny fitness (survival × reproduction) following controlled matings between virulent males or females and avirulent males or females, and by manipulating YLS densities in progeny through heat treatment. We found virulence-adapted planthoppers developed faster, grew larger, had adults that survived for longer, had female-biased progeny, and produced more eggs than non-selected planthoppers on the resistant variety. However, feeding capacity—as revealed through honeydew composition—remained inefficient on IR62, even after 20+ generations of exposure to the resistant host. Virulence was derived from both the male and female parents; however, females contributed more than males to progeny virulence. We found that YLS are essential for normal planthopper development and densities are highest in virulent nymphs feeding on the resistant host; however, we found only weak evidence that YLS densities contributed more to virulence. Virulence against IR62 in the brown planthopper, therefore, involves a complex of traits that encompass a series of behavioral, physiological, and genetic mechanisms, some of which are determined only by the female parent.
dc.identifierhttps://hdl.handle.net/10568/164185
dc.identifier.urihttp://hdl.handle.net/123456789/25466
dc.languageen
dc.publisherMDPI
dc.rightsOpen Access
dc.sourceHorgan, F.G., Cruz, A.P., Arida, A., Ferrater, J.B. and Bernal, C.C. 2021. Adaptation by the brown planthopper to resistant rice: A test of female-derived virulence and the role of yeast-like symbionts. Insects, Volume 12 no. 10 p. 908
dc.subjectinsect science
dc.titleAdaptation by the brown planthopper to resistant rice: A test of female-derived virulence and the role of yeast-like symbionts
dc.typeJournal Article

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