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Record number 497862
Title Quantitative resistance against Bemisia tabaci in Solanum pennellii: Genetics and metabolomics
Author(s) Elsen, F.H.W. van den; Lucatti, A.F.; Heusden, A.W. van; Broekgaarden, C.; Mumm, R.; Dicke, M.; Vosman, B.
Source Journal of Integrative Plant Biology 58 (2016)4. - ISSN 1672-9072 - p. 397 - 412.
Department(s) Laboratory of Plant Breeding
WUR PB Breeding for Quality
PRI BIOS Applied Metabolic Systems
Laboratory of Entomology
WUR PB Non host en Insectenresistentie
Publication type Refereed Article in a scientific journal
Publication year 2016
Abstract The whitefly Bemisia tabaci is a serious threat in tomato cultivation worldwide as all varieties grown today are highly susceptible to this devastating herbivorous insect. Many accessions of the tomato wild relative Solanum pennellii show a high resistance towards B. tabaci. A mapping approach was used to elucidate the genetic background of whitefly-resistance related traits and associated biochemical traits in this species. Minor quantitative trait loci (QTLs) for whitefly adult survival (AS) and oviposition rate (OR) were identified and some were confirmed in an F2BC1 population, where they showed increased percentages of explained variance (more than 30%). Bulked segregant analyses on pools of whitefly-resistant and -susceptible F2 plants enabled the identification of metabolites that correlate either with resistance or susceptibility. Genetic mapping of these metabolites showed that a large number of them co-localize with whitefly-resistance QTLs. Some of these whitefly-resistance QTLs are hotspots for metabolite QTLs. Although a large number of metabolite QTLs correlated to whitefly resistance or susceptibility, most of them are yet unknown compounds and further studies are needed to identify the metabolic pathways and genes involved. The results indicate a direct genetic correlation between biochemical-based resistance characteristics and reduced whitefly incidence in S. pennellii.
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