Skip to main content
ARS Home » Plains Area » Fort Collins, Colorado » Center for Agricultural Resources Research » Soil Management and Sugarbeet Research » Research » Publications at this Location » Publication #311832
Title: Beet curly top resistance in germplasm from the USDA-ARS Ft. Collins program, 2014

Author
item Panella, Leonard
item Strausbaugh, Carl

Submitted to: Plant Disease Management Reports
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/10/2015
Publication Date: 3/20/2015
Publication URL: http://handle.nal.usda.gov/10113/61802
Citation: Panella, L.W., Strausbaugh, C.A. 2015. Beet curly top resistance in germplasm from the USDA-ARS Ft. Collins program, 2014. Plant Disease Management Reports. 9:FC097.

Interpretive Summary: Ninety-seven sugar beet lines from the USDA-ARS Ft. Collins sugar beet program and four control lines were screened for response to Beet curly top virus. The curly top evaluation was conducted at the USDA-ARS North Farm in Kimberly, ID. The plots were two rows 10 ft long with 22-in row spacing. Plants were inoculated at the four- to six-leaf growth stage with approximately six beet leafhoppers per plant that carried the curly top virus. The beet leafhoppers were redistributed three times a day during the first two days and then twice a day for five more days by dragging a tarp through the field. Plots were rated for leaf symptom development using a scale of 0 to 9 (0 = healthy and 9 = dead). Data were analyzed and mean ratings compared. Curly top symptom development was uniform and no other disease problems were evident in the plot area. In total, four lines were not different from the resistant control performance (HM PM90 with DI = 4.09), while six other lines, did not differ from HM PM90 with a DI of 4.47. The lines will be investigated further to see if they represent new sources of curly top resistance, and brought forward for release as curly top resistant germplasms. Identifying new sources of resistance should allow seed companies to improve resistance to curly top in commercial sugar beet cultivars. These results and germplasm will be accessible to interested parties through the USDA-ARS, NPGS GRIN database (http://www.ars-grin.gov/npgs/index.html).

Technical Abstract: Ninety-seven sugar beet (Beta vulgaris L.) germplasm lines from the USDA-ARS Ft. Collins sugar beet program, a resistant control germplasm (1996A008), and three commercial control cultivars [SV2012RR (susceptible), Monohikari (susceptible) and HM PM90 (resistant)] were screened for response to Beet curly top virus (BCTV). The curly top evaluation was conducted at the USDA-ARS North Farm in Kimberly, ID. The plots were two rows 10 ft long with 22-in row spacing and arranged in a randomized complete block design with four replicates. Plants were inoculated at the four- to six-leaf growth stage with approximately six viruliferous beet leafhoppers per plant. The beet leafhoppers were redistributed three times a day during the first two days and then twice a day for five more days by dragging a tarp through the field. Plots were rated for foliar symptom development on 16 Jul using a scale of 0 to 9 (0 = healthy and 9 = dead). Data were analyzed in SAS using the general linear models procedure (Proc GLM), and Fisher’s protected least significant difference (LSD; a = 0.05) was used for mean comparisons. Curly top symptom development was uniform and no other disease problems were evident in the plot area. In total, four lines were not significantly different from the resistant control performance (HM PM90 with DI = 4.09), while six other lines, did not differ significantly from HM PM90 with a DI of 4.47. The lines will be investigated further to see if they represent novel sources of curly top resistance, and brought forward for release as curly top resistant germplasms. Identifying novel sources of resistance should allow seed companies to improve resistance to BCTV in commercial sugar beet cultivars. These results and germplasm will be accessible to interested parties through the USDA-ARS, NPGS GRIN database (http://www.ars-grin.gov/npgs/index.html).