Potato variety screening and genetic resistance characterization against Colorado potato beetle
A research program at Oregon State University screening commercial russet potato clones for natural resistance to Colorado potato beetle (CPB). The work identifies biochemical and morphological traits—such as glycoalkaloid content and glandular trichome density—that reduce CPB feeding, and develops genetic mapping populations to support breeding of CPB-resistant varieties.
Overview
Colorado potato beetle (CPB), Leptinotarsa decemlineata Say, is the most destructive insect pest of potato and has evolved resistance to more than 50 commercial insecticides. This research program at Oregon State University evaluates commercial russet potato clones under CPB pressure to identify varieties with natural biochemical and morphological defenses that reduce insect performance. Field trials across ten commercial varieties have already shown strong CPB preference for certain clones, indicating exploitable differences in plant defense. The program aims to characterize these resistance sources and translate them into breeding tools for the potato industry.
Technical specifications
Research approach and methods:
- Field testing of ten commercial russet varieties (Alturas, Castle Russet, Clearwater Russet, Dakota Diamond, Echo Russet, F14085, Payette Russet, Russet Burbank, Russet Norkotah, and Shepody) under natural CPB pressure
- Measurement of CPB egg masses, larvae, adults, and defoliation as preference and performance indicators
- Assessment of the relationship between insect damage, foliar glycoalkaloid content, and glandular trichome density
- Development of mapping populations that segregate for CPB resistance to support marker-assisted breeding
- Evaluation of RNAi-based approaches for CPB control as a complementary management tool
- Investigation of morphological and chemical plant defense mechanisms activated by CPB attack
Technology readiness level
The program is at an early-to-mid stage of development. Preliminary field data from 2020 trials have confirmed that CPB exhibits strong preference among commercial clones, validating the underlying hypothesis. Future validation will focus on confirming resistance sources across russet varieties grown in the Pacific Northwest, characterizing glycoalkaloid and trichome-based defenses, building segregating mapping populations, and testing RNAi materials. Outputs are intended to support breeding programs and integrated pest management strategies for potato growers.
About Oregon State University
Oregon State University is a comprehensive public research university and Oregon’s land‑grant institution, with a main campus in Corvallis and a statewide footprint. Industry partners tap a statewide Extension network and county offices to pilot and scale solutions with communities and companies across Oregon. A coastal marine science campus in Newport anchors ocean research and provides access to open‑ocean wave‑energy test ranges and grid‑connected infrastructure under development nearby, enabling sea‑to‑shore prototyping. Field stations and university‑managed research forests support long‑term trials and product validation in real‑world environments. A dedicated technology transfer office and the OSU Advantage programs—including the Advantage Accelerator—streamline IP, licensing, startup formation, and industry agreements.
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