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ARS Home » Plains Area » Fargo, North Dakota » Edward T. Schafer Agricultural Research Center » Sugarbeet and Potato Research » Research » Publications at this Location » Publication #404774
Research Project: Increasing Sugar Beet Productivity and Sustainability through Genetic and Physiological Approaches

Location: Sugarbeet and Potato Research

Title: Evaluation of sugar beet breeding lines for resistance to Rhizoctonia crown and root rot, 2022

Author
item LEIN, AUSTIN - University Of Minnesota
item Chu, Chenggen
item CHANDA, ASHOK - University Of Minnesota

Submitted to: Plant Disease Management Reports
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/20/2023
Publication Date: 3/15/2023
Citation: Lein, A.K., Chu, C.N., Chanda, A.K. 2023. Evaluation of sugar beet breeding lines for resistance to Rhizoctonia crown and root rot, 2022. Plant Disease Management Reports. 17. Article 055.

Interpretive Summary: Rhizoctonia crown and root rot (RCRR) is a serious fungal root disease for sugar beets caused by Rhizoctonia solani. Application of varieties resistant to RCRR is the most efficient way for disease management. To identify resistance source, breeding lines from USDA-ARS sugar beet genetics program at Fargo, ND were evaluated for resistance to RCRR in a field nursery at University of Minnesota, Crookston, MN. One breeding line showed significantly lower RCRR severity compared to the susceptible check and can be potentially used as resistance source in breeding.

Technical Abstract: Rhizoctonia crown and root rot (RCRR) is a serious fungal root disease for sugar beets caused by Rhizoctonia solani. To identify resistance to RCRR, 42 sugar beet breeding lines were evaluated in field nurseries at University of Minnesota, Crookston, MN with three replications included. Ground barley infested with Rhizoctonia solani isolate AG 2-2 was spread directly over sugar beet crowns at a rate of 20 g per row for inoculation. Ten roots were arbitrarily selected from each replication and rated for the severity of RCRR using a 0 to 10 scale with a 10% incremental increase per each unit of rating. Significant differences among lines were observed. Line 10N0034 showed significantly lower RCRR severity compared to the susceptible check, and could be used as resistance source.