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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #378081
Research Project: Productive Cropping Systems Based on Ecological Principles of Pest Management

Location: Integrated Cropping Systems Research

Title: Soybean aphids per plant among soybean lines containing various rag genes

Author
item Hesler, Louis
item Beckendorf, Eric

Submitted to: Ag Data Commons
Publication Type: Other
Publication Acceptance Date: 8/4/2020
Publication Date: 8/5/2020
Citation: Hesler, L.S., Beckendorf, E.A. 2020. Soybean aphids per plant among soybean lines containing various rag genes. Ag Data Commons. Ag Data Commons.

Interpretive Summary: The soybean aphid is an insect pest of cultivated soybeans. Several genes with resistance to soybean aphid, known as "Rag" genes, have been identified in soybean. Virulent strains of soybean aphid may overcome the resistance and colonize soybeans having one or more Rag genes. So, it is important to classify virulent strains of soybean aphids in evaluating soybean lines in order to develop cultivars with durable resistance. The files presented here report the number of soybean aphids on soybean lines that differed in the Rag genes they contained. Tests were conducted separately against the two soybean aphid colonies, 'Accrue' and 'Volga16,' for 20 days under no-choice conditions in a laboratory growth chamber. Each test consisted of seven soybean lines. Six had one or more Rag genes: 19APH18 (Rag1), 19APH25 (Rag2), 19INC (Rag3), 19APH29 (Rag4), 19APH30 (Rag6), 19APH09Rag12 (a Rag1+Rag2 combination); and ‘Titan,’ an aphid-susceptible soybean cultivar. Counts varied by line but were different for each colony. The Accrue colony was virulent against Rag1, Rag 3 and Rag4. The Volga16 was virulent against Rag1, Rag2, Rag3, Rag4 and Rag1+2. The data are contained in separate files, one for each of two soybean aphid colonies. Because of their distinct virulence profiles, it would be good for future research to test resistant soybean against both of these colonies to ensure broad-specturm control of soybean aphid in the development of future soybean culitvars.

Technical Abstract: The soybean aphid (Aphis glycines) is an insect pest of cultivated soybeans (Glycine max). Several genes with resistance to A. glycines (i.e. "Rag" genes) have been identified in soybean. Virulent strains of soybean aphid overcome the resistance and colonize soybeans having one or more Rag genes. It is important to classify virulent strains of soybean aphids in evaluating soybean lines in order to develop cultivars with durable resistance. The files presented here report the number of soybean aphids on soybean lines that differed in the Rag genes they contained. Tests were conducted separately against the two soybean aphid colonies, 'Accrue' and 'Volga16,' for 20 days under no-choice conditions in a laboratory growth chamber. Each test consisted of seven soybean lines. Six had one or more Rag genes: 19APH18 (Rag1), 19APH25 (Rag2), 19INC (Rag3), 19APH29 (Rag4), 19APH30 (Rag6), 19APH09Rag12 (a Rag1+Rag2 pyramid); and ‘Titan,’ an aphid-susceptible soybean cultivar. Counts varied by line but were different for each colony. The data are contained in separate files, one for each of two soybean aphid colonies.