SOYBEAN.APHID.SD.2017

Authors: Hesler, Louis; Beckendorf, Eric; TILMON, K - The Ohio State University; BURKARD, N - South Dakota State University; VAN DE STROET, B - South Dakota State University; ROZEBOOM, P - South Dakota State University

Submitted to: Germplasm Resources Information Network (GRIN)
Publication Type: Other
Publication Acceptance Date: 3/28/2017
Publication Date: 3/29/2017
Citation: Hesler, L.S., Beckendorf, E.A., Tilmon, K., Burkard, N., Van De Stroet, B., Rozeboom, P. 2017. SOYBEAN.APHID.SD.2017. Germplasm Resources Information Network (GRIN). Available: npgsweb.ars-grin.gov/gringlobal/method.aspx?id=495901.

Interpretive Summary: Infestations by soybean aphid (SA) can reduce soybean yield. Aphid-resistant soybean may be useful in reducing SA infestations and limiting yield loss. Resistance to SA was characterized among 746 soybean lines in 56 growth chamber tests at the North Central Agricultural Research Laboratory, Brookings, SD, from 2012 through 2015. Infestations were rated at the 2-leaf stage of soybean development on a 1-to-6 scale, with 1 = 0 to 50, 2 = 51 to 100, 3 = 101 to 150, 4 = 151 to 200, 5 = 201 to 250, and 6 with >250 SA per test plant, respectively. Soybean lines were ranked by median infestation rating. A line was classified as resistant if its median rating was less than 3.0; moderately resistant if median rating was from 3.0 to 4.9; and susceptible if a rating exceeded 4.9. Results show that the vast majority of soybean lines were susceptible to SA. However, 10 lines were resistant to SA, and 23 were moderately resistant. The resistant lines should be advanced for in-depth testing to see if they are useful in developing aphid-resistant soybean lines.

Technical Abstract: Infestations by soybean aphid (SA) can reduce soybean yield. Thus, SA-resistant soybean may be useful in reducing infestations and limiting yield loss. Expression of resistance was characterized among 746 soybean accessions in 56 growth chamber tests at the North Central Agricultural Research Laboratory, Brookings, SD, from 2012 through 2015. Infestations were rated at the 2-leaf stage of soybean development on a 1-to-6 scale, with 1 = 0 to 50, 2 = 51 to 100, 3 = 101 to 150, 4 = 151 to 200, 5 = 201 to 250, and 6 with >250 SA per test plant, respectively. Accessions were ranked by median infestation rating. An accession was classified as resistant if its median rating was less than 3.0; moderately resistant if median rating was from 3.0 to 4.9; and susceptible if a rating exceeded 4.9. Results show that the vast majority of accessions were susceptible to SA. However, 10 accessions were resistant to SA, and 23 were moderately resistant. The resistant accessions should be advanced for in-depth testing to see if they may be useful in developing aphid-resistant soybean cultivars.