USDA-ARS plant introduction lines evaluated for rhizomania and storage rot resistance in Idaho, 2023

Strausbaugh, C.A. and Vincill, E.D. and Majumdar, R. (2024) USDA-ARS plant introduction lines evaluated for rhizomania and storage rot resistance in Idaho, 2023. Plant Disease Management Reports. 18(V068):1-2. 27 November 2024.

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Abstract

Thirty sugar beet (Beta vulgaris L.) USDA-ARS Plant Introduction (PI) lines and five check cultivars were screened for resistance to
Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania, and to storage rot. The rhizomania evaluation was
conducted at the USDA-ARS North Farm in Kimberly, ID which has Portneuf silt loam soil and had been in barley in 2022. The field
was fall plowed with a Terrano chisel plow. In the spring the field was fertilized (115 lb N and 140 lb P2O5/A) and roller harrowed on
10 Apr 23. The germplasm was planted (density of 114,048 seeds/A) on 2 May. The plots were one row 10-ft long with 22-in.
between-row spacing and arranged in a randomized complete block design with 6 replicates. The crop was managed according to
standard cultural practices for southern Idaho. The trial relied on endemic field inoculum for rhizomania and storage rot development.
The plots were rated for rhizomania foliar symptom (percentage of plants with yellow, stunted, upright leaves) development on 7 Aug.
The plants were mechanically topped and hand harvested on 16-17 Oct. At harvest, ten roots per plot were rated for rhizomania
symptom development using a scale of 0 to 9 (0 = healthy and 9 = dead; Plant Disease 92:581-587). At harvest, eight roots per plot
were also placed in a mesh-onion bag and kept in an indoor commercial storage facility (temperature set point 34°F) in Paul, ID on 18
Oct. On 11 Mar 24, after 145 days in storage, the roots were evaluated for the percentage of root surface area covered by fungal
growth or rot. Except for root ratings, data were analyzed in SAS (Ver. 9.4) using the general linear model (Proc GLM) procedure,
and Fisher’s protected least significant difference (α = 0.05) was used for mean comparisons. The root ratings were analyzed in a
nonparametric analysis as described by Shah and Madden (Phytopathology 94:33-43).

Item Type:	Article
Subjects:	Irrigated crops > Sugarbeet > Rhizomania Irrigated crops > Sugarbeet > Storage Irrigated crops > Sugarbeet
Depositing User:	Users 11 not found.
Date Deposited:	02 Dec 2024 20:11
Last Modified:	02 Dec 2024 20:11
Item ID:	1843
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1843