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United States Department of Agriculture

Agricultural Research Service

Research Project: Multidisciplinary Approaches to Enhanced Sugar Beet Germplasm

Location: Sugarbeet Research

Title: Inproving key root traits in sugar beet: fusarium resistance

Authors
item Stevanato, P -
item Sella, L -
item DE Lucchi, C -
item Broccanella, C -
item Nipoti, P -
item Hanson, Linda
item Panella, Leonard

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 11, 2014
Publication Date: July 3, 2014
Citation: Stevanato, P., Sella, L., De Lucchi, C., Broccanella, C., Nipoti, P., Hanson, L.E., Panella, L.W. 2014. Inproving key root traits in sugar beet: fusarium resistance. Meeting Abstract. 74th IIRB Congress, Dresden, Germany. July 1-3, 2014.

Interpretive Summary: Root-rot caused by Fusarium oxysporum is an important and widespread soil-borne disease of sugar beet. In this study, we evaluated the resistance to Fusarium of a wide collection of sugar beet lines (CRA-CIN Rovigo’s genetic pool) by artificial inoculation with two fungal isolates from Harbin (China) and Uman (Ukraine). After six weeks, plants were scored for disease symptoms, including leaf stunting, chlorosis and necrosis, on the basis of a phenotypic resistance scale from 1 to 5. We identified two lines, L02 and L18, showing low and high levels of disease symptoms, respectively. These results are in agreement with field observations at two different study sites in the Ukraine where L02 and L18 lines were classified as resistant and susceptible to root-rot respectively under heavy infection pressure. The two fungal isolates (Harbin and Uman) and the two inoculation doses (104 and 105 spores/ml) evaluated did not show significant differences in disease symptoms. The two lines (L02 and L18) here identified will be crossed to develop segregating populations for further genetic improvement studies at the molecular level (e.g. identification of SNP molecular markers associated with Fusarium resistance).

Technical Abstract: Root-rot caused by Fusarium oxysporum is an important and widespread soil-borne disease of sugar beet. In this study, we evaluated the resistance to Fusarium of a wide collection of sugar beet lines (CRA-CIN Rovigo’s genetic pool) by artificial inoculation with two fungal isolates from Harbin (China) and Uman (Ukraine). After six weeks, plants were scored for disease symptoms, including leaf stunting, chlorosis and necrosis, on the basis of a phenotypic resistance scale from 1 to 5. We identified two lines, L02 and L18, showing low and high levels of disease symptoms, respectively. These results are in agreement with field observations at two different study sites in the Ukraine where L02 and L18 lines were classified as resistant and susceptible to root-rot respectively under heavy infection pressure. The two fungal isolates (Harbin and Uman) and the two inoculation doses (104 and 105 spores/ml) evaluated did not show significant differences in disease symptoms. The two lines (L02 and L18) here identified will be crossed to develop segregating populations for further genetic improvement studies at the molecular level (e.g. identification of SNP molecular markers associated with Fusarium resistance).

Last Modified: 10/24/2014
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