Skip to main content
ARS Home » Midwest Area » East Lansing, Michigan » Sugarbeet and Bean Research » Research » Publications at this Location » Publication #297342
Title: Registration of SR98 sugar beet germplasm with resistances to Rhizoctonia seedling and crown and root rot diseases

Author
item McGrath, Jon
item Hanson, Linda
item Panella, Leonard

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/6/2014
Publication Date: 4/10/2015
Citation: McGrath, J.M., Hanson, L.E., Panella, L.W. 2015. Registration of SR98 sugar beet germplasm with resistances to Rhizoctonia seedling and crown and root rot diseases. Journal of Plant Registrations. 9:227-231.

Interpretive Summary: SR98 and SR98/2 are enhanced sugar beet germplasm lines being released as a source of high levels of resistance to damping-off and crown and root rot caused by the soil-borne fungus Rhizoctonia solani, in a smooth-root (SR), low soil tare, genetic background. Previous smooth–root releases have been highly susceptible to diseases caused by R. solani. SR98 derives from Rhizoctonia resistant germplasm released from the USDA-ARS sugar beet germplasm enhancement programs at Ft. Collins, CO and East Lansing, MI. SR98 showed good yield potential in agronomic trials, and shows good resistance to Aphanomyces blackleg and Cercospora leaf spot. SR98/2 is a re-selection of SR98 after challenge under severe combined natural Aphanomyces and inoculated Rhizoctonia disease pressures. SR98 and SR98/2 are expected to be useful for developing hybrids adapted to the Great Lakes growing region and elsewhere.

Technical Abstract: Sugar beet (Beta vulgaris L.) germplasms SR98 (PI 655951) and SR98/2 (659754) are being released as potential pollinators or populations from which to select pollinators for hybrid seed production, and were developed by the USDA-ARS, at East Lansing, MI, in cooperation with the Beet Sugar Development Foundation, Denver, CO and Michigan State University AgBioResearch, East Lansing, MI. SR98 and SR98/2 have a moderately smooth root that contributes to low soil tare root and high levels of resistance to damping-off and crown and root rot caused by Rhizoctonia solani Kühn (AG2-2). Previous smooth–root releases have been highly susceptible to diseases caused by R. solani. SR98 derives from Rhizoctonia resistant germplasm released from the USDA-ARS sugar beet germplasm enhancement programs at Ft. Collins, CO and East Lansing, MI. SR98 showed good yield potential in agronomic trials, and has shown reasonable resistance to Aphanomyces blackleg and Cercospora leaf spot as is customary of traditional East Lansing ARS germplasm. SR98/2 is a re-selection of SR98 after challenge under severe combined natural Aphanomyces and inoculated Rhizoctonia disease pressures. SR98 and SR98/2 are expected to be useful as pollinators or population from which to select pollinators for developing hybrids adapted to the Great Lakes growing region and elsewhere.