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Heterosis for interactions between insect herbivores and 3-line hybrid rice under low and high soil nitrogen conditions

dc.contributor.authorHorgan, Finbarr G.
dc.contributor.authorBernal, Carmencita C.
dc.contributor.authorFame Ramal, Angelee
dc.contributor.authorAlmazan, Maria Liberty P.
dc.contributor.authorMundaca-Ortega, Enrique
dc.contributor.authorCrisol-Martínez, Eduardo
dc.date.accessioned2024-08-07T15:16:06Z
dc.date.available2024-08-07T15:16:06Z
dc.date.issued2024
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/5598
dc.description.abstractHybrid rice results from crossing a male-sterile line (the A line) with a pollen doner (the restorer or R line). In 3-line hybrid breeding systems, a fertile B line is also required to maintain A line populations. Heterosis is defined as a condition of traits whereby the hybrid exceeds the average of the parental lines. Heterobeltiosis is where the hybrid exceeds both parents. Hybrid rice may display heterosis/heterobeltiosis for growth, yield and resistance to herbivores, among other traits. In a greenhouse experiment, we assessed the frequency of heterosis for resistance to the brown planthopper (Nilaparvata lugans (BPH)), whitebacked planthopper (Sogatella furcifera (WBPH)) and yellow stemborer (Scirpophaga incertulas (YSB)) in eight hybrids under varying soil nitrogen conditions. We also assessed plant biomass losses due to herbivore feeding as an approximation of tolerance (the plant’s capacity to compensate for damage). Nitrogen reduced resistance to all three herbivores but was also associated with tolerance to WBPH and YSB based on improved plant survival, growth and/or yields. Plant biomass losses per unit weight of WBPH also declined under high nitrogen conditions for a number of hybrids, and there were several cases of overcompensation in rice for attacks by this herbivore. There was one case of nitrogen-related tolerance to BPH (increased grain yield) for a hybrid line with relatively high resistance, likely due to quantitative traits. Heterosis and heterobeltiosis were not essential to produce relatively high herbivore resistance or tolerance across hybrids.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceInsects, 15(6), 416es_CL
dc.subjectBrown planthopperes_CL
dc.subjectFertilizeres_CL
dc.subjectHerbivory tolerancees_CL
dc.subjectHeterobeltiosises_CL
dc.subjectHeterosises_CL
dc.subjectHost plant resistancees_CL
dc.subjectPlant physiologyes_CL
dc.subjectRice herbivoreses_CL
dc.subjectWhitebacked planthopperes_CL
dc.subjectVellow stemboreres_CL
dc.titleHeterosis for interactions between insect herbivores and 3-line hybrid rice under low and high soil nitrogen conditionses_CL
dc.typeArticlees_CL
dc.ucm.facultadFacultad de Ciencias Agrarias y Forestaleses_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.urimdpi.com/2075-4450/15/6/416es_CL
dc.ucm.doidoi.org/10.3390/insects15060416es_CL


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