Beet curly top resistance in germplasm from the USDA-ARS Ft. Collins program, 2014

Panella, Leonard W. and Strausbaugh, C.A. (2015) Beet curly top resistance in germplasm from the USDA-ARS Ft. Collins program, 2014. Plant Disease Management Reports. 9(FC097). 20 March 2015.

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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).

Item Type:	Article
NWISRL Publication Number:	1549
Subjects:	Irrigated crops > Sugarbeet > Curly top Irrigated crops > Sugarbeet
Depositing User:	Dan Stieneke
Date Deposited:	13 Jan 2016 19:51
Last Modified:	13 Jan 2016 19:51
Item ID:	1609
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1609