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ARS Home » Midwest Area » Madison, Wisconsin » Vegetable Crops Research » Research » Publications at this Location » Publication #352425
Research Project: Management of Genetic Resources and Associated Information in the U. S. Potato Genebank

Location: Vegetable Crops Research

Title: Resistance to Meloidogyne chitwoodi identified in wild potato species

Author
item GRAEBNER, RYAN - OREGON STATE UNIVERSITY
item BROWN, CHUCK - RETIRED ARS EMPLOYEE
item INGRAM, RUSSEL - OREGON STATE UNIVERSITY
item HAFERTY, CHRISTINA - OREGON STATE UNIVERSITY
item MOJTAHEDI, HASSAN - WASHINGTON STATE UNIVERSITY
item QUICK, RICHARD - WASHINGTON STATE UNIVERSITY
item HAMLIN, LAUNA - WASHINGTON STATE UNIVERSITY
item WADE, NADINE - OREGON STATE UNIVERSITY
item Bamberg, John
item SATHUVALLI,, VIDYASAGAR - OREGON STATE UNIVERSITY

Submitted to: American Journal of Potato Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/12/2018
Publication Date: 7/10/2018
Citation: Graebner, R., Brown, C., Ingram, R., Haferty, C., Mojtahedi, H., Quick, R., Hamlin, L., Wade, N., Bamberg, J.B., Sathuvalli,, V. 2018. Resistance to Meloidogyne chitwoodi identified in wild potato species. American Journal of Potato Research. (2018) 95:679–686. https://doi.org/10.1007/s12230-018-9674-9.
DOI: https://doi.org/10.1007/s12230-018-9674-9

Interpretive Summary: Potato is the nation's top vegetable, but growing the crop is expensive due to many disease, pest, and stress vulnerabilities. A particularly vexing problem is tiny parasitic worms (nematodes) that ruin yield and quality, since their presence in the soil makes usual pesticide countermeasures especially difficult, costly, and toxic. Fortunately, potato also has more wild relatives than any other major crop that are useful for breeding. We broadly screened among numerous species in the US Potato Genebank at Sturgeon Bay, Wisconsin, finding potent new sources of resistance to nematodes. This sets the stage for breeding to incorporate natural plant resistance into new US potato varieties.

Technical Abstract: Meloidogyne chitwoodi (the Columbia root-knot nematode, CRKN) can cause serious damage in potato production systems. Damage caused by M. chitwoodi decreases tuber value in both the fresh market and processing industries. Genetic resistance to CRKN was first identified from the wild diploid potato species Solanum bulbocastanum accession SB22 and was successfully introgressed into tetraploid potato breeding material. In order to expand the base of genetic resistance, 40 plant accessions from nine wild potato species were screened for their resistance to M. chitwoodi. Greenhouse screening identified fifteen clones from S. hougasii, one clone from S. bulbocastanum, and one clone from S. stenophyllidium with moderate to high levels of resistance against three isolates of M. chitwoodi. Geographical mapping showed that these new resistance sources originated in the states of Jalisco and Michoacán in west-central Mexico. These new sources will be introgressed into elite potato populations to allow the development of potato cultivars with durable resistance to CRKN.