Virulence adaptation in a rice leafhopper: Exposure to ineffective genes compromises pyramided resistance

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cg.identifier.doihttps://doi.org/10.1016/j.cropro.2018.07.010
cg.issn0261-2194
cg.journalCrop Protection
cg.volume113
dc.contributor.authorHorgan, Finbarr G.
dc.contributor.authorBernal, Carmencita C.
dc.contributor.authorVu, Quynh
dc.contributor.authorAlmazan, Maria Liberty P.
dc.contributor.authorRamal, Angelee Fame
dc.contributor.authorYasui, Hideshi
dc.contributor.authorFujita, Daisuke
dc.date.accessioned2024-12-19T12:54:18Zen
dc.date.available2024-12-19T12:54:18Zen
dc.identifier.urihttps://hdl.handle.net/10568/164777
dc.titleVirulence adaptation in a rice leafhopper: Exposure to ineffective genes compromises pyramided resistanceen
dcterms.abstractPyramiding resistance genes is predicted to increase the durability of resistant rice varieties against phloem-feeding herbivores. We examined responses by the green leafhopper, Nephotettix virescens (Hemiptera: Cicadellidae), to near-isogenic rice lines with zero, one and two resistance genes. The recurrent parent (T65) and monogenic lines (GRH2-NIL and GRH4-NIL) with genes for resistance to the green rice leafhopper, Nephotettix cincticeps (Hemiptera: Cicadellidae), were susceptible to the green leafhopper, but the pyramided line (GRH2/GRH4-PYL) was highly resistant to the green leafhopper. We selected green leafhoppers, N. virescens, from five sites in the Philippines for over 20 generations on each of the four lines. Populations selected on GRH2/GRH4-PYL gained partial virulence (feeding and development equal to that on T65) to the pyramided line within 10 generations and complete virulence (egg-laying equal to that on T65) within 20 generations. After 20 generations of rearing on the susceptible monogenic lines, green leafhoppers were also capable of developing and laying eggs on GRH2/GRH4-PYL. Furthermore, green leafhoppers reared on the susceptible GRH4-NIL for 20 generations showed equal preferences for T65 and GRH2/GRH4-PYL in choice bioassays. Our results indicate that previous long-term exposure to ineffective genes (including unperceived resistance genes) could dramatically reduce the durability of pyramided resistance. We suggest that informed crop management and deployment strategies should be developed to accompany rice lines with pyramided resistance and avoid the build-up of virulent herbivore populations.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationHorgan, Finbarr G.; Bernal, Carmencita C.; Vu, Quynh; Almazan, Maria Liberty P.; Ramal, Angelee Fame; Yasui, Hideshi and Fujita, Daisuke. 2018. Virulence adaptation in a rice leafhopper: Exposure to ineffective genes compromises pyramided resistance. Crop Protection, Volume 113 p. 40-47en
dcterms.extentpp. 40-47
dcterms.issued2018-11
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherElsevier
dcterms.subjectbioassaysen
dcterms.subjectcrop managementen
dcterms.subjectdisease resistanceen
dcterms.subjectgenetic markersen
dcterms.subjectintegrated pest managementen
dcterms.subjectpathogenicityen
dcterms.subjectpesticide resistanceen
dcterms.subjectplant breedingen
dcterms.subjectplant protectionen
dcterms.typeJournal Article

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