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United States Department of Agriculture

Agricultural Research Service

Title: Sources of Partial Resistance to Fusarium Root Rot in the Pisum Core Collection

Authors
item Grunwald, Niklaus
item Coffman, Virginia
item Kraft, J - USDA ARS PWA, RETIRED

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 9, 2003
Publication Date: October 1, 2003
Citation: GRUNWALD, N.J., COFFMAN, V.A., KRAFT, J.M. SOURCES OF PARTIAL RESISTANCE TO FUSARIUM ROOT ROT IN THE PISUM CORE COLLECTION. PLANT DISEASE. 2003. 87(10):1197-1200.

Interpretive Summary: Fusarium root rot is one of the most important fungal diseases of peas found in most pea growing areas around the world. Currently, no commercial cultivars are completely resistant to this diseases. Availability of new sources of resistance could provide resistance as yet another tool for managing Fusarium root rot. Three hundred eighty seven accessions from the pea core collection were evaluated for resistance to Fusarium root rot in two independent experiments. Statistical analysis indicated that the two independent experiments yielded the same results. Forty-four accessions with a disease severity rating of 2.5 or less on a 0 to 5 scale were selected as being partially resistant to root rot. Comparison of disease data for Aphanomyces root rot and Fusarium root rot showed a weak, but significant and positive correlation.

Technical Abstract: Fusarium root rot, caused by Fusarium solani f. sp. pisi, is one of the most important fungal diseases of pea and is found in most pea growing areas around the world. Currently, no commercial cultivars are resistant to this pathogen. Availability of new sources of partial resistance could provide another tool for managing Fusarium root rot. Three hundred eighty-seven accessions from the Pisum core collection were evaluated for resistance to Fusarium root rot in two independent experiments. Nonparametric analysis of variance conducted on ranks of disease severity for each accession indicated that the two experiments corresponded well. Forty-four PI lines with a disease severity rating of 2.5 or less on a 0 to 5 scale were selected as being partially resistant to root rot. Resistance was quantitative in nature and immunity to Fusarium root rot was not found. A complete listing of the data for the partial resistance of all accessions tested can be found at the National Plant Germplasm System website, USDA ARS. Comparison of disease resistance data for Aphanomyces root rot and Fusarium root rot showed a weak, but significant and positive correlation.

Last Modified: 10/22/2014
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