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United States Department of Agriculture

Agricultural Research Service

Research Project: IMPROVEMENT OF PEST RESISTANCE AND QUALITY TRAITS OF SOYBEAN

Location: Corn, Soybean and Wheat Quality Research Unit

Title: Identification of novel sources of host plant resistance to the soybean aphid biotypes

Authors
item Bansal, Raman -
item Mian, Rouf
item Michel, Andrew -

Submitted to: Journal of Economic Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 16, 2013
Publication Date: June 1, 2013
Repository URL: http://handle.nal.usda.gov/10113/58212
Citation: Bansal, R., Mian, R.M., Michel, A.P. 2013. Identification of novel sources of host plant resistance to the soybean aphid biotypes. Journal of Economic Entomology. 106:1479-85.

Interpretive Summary: The soybean aphid (Aphis glycines Matsumura) is a major pest of soybean in North America and host plant resistance (HPR) is the most desirable approach for management of this pest. While soybean cultivars with resistance to the soybean aphid have been commercially released, the presence of virulent biotypes capable of overcoming plant resistance diminishes the durability of host-plant resistance as a stable management tactic. Biotypes are different types within an insect species that have differential responses to known HPR genes. Novel sources of HPR are needed to combat rapid soybean aphid biotype evolution. In this study, we screened 1,021 soybean Plant Introductions (PIs) for resistance to 3 known biotypes of the soybean aphid. Based on a series of growth chamber and field screenings, we identified 11 PIs which showed resistance against biotype 1 of the soybean aphid. Among these 11 PIs, 7 PIs were resistant to biotype 2 and 5 PIs were resistant to biotype 3. Further, 2 PIs showed resistance against all 3 biotypes. We also identified 11 PIs that were potentially tolerant to the soybean aphid as illustrated by no adverse impact on plant growth and development. Since resistant PIs identified in this study belong to MG II-IV they can be readily crossed to early maturing cultivars adapted to North-Central states of the U.S., where the aphid is a major pest. The genetic characterization of resistance in these PIs and incorporation of the novel resistant genes into elite soybean cultivars will broaden the defense against multiple biotypes of the soybean aphid.

Technical Abstract: While soybean cultivars with resistance to the soybean aphid (Aphis glycines Matsumura) have been commercially released, the presence of virulent biotypes capable of overcoming plant resistance threatens the durability of host-plant resistance as a stable management tactic. Novel sources of host plant resistance (HPR) are needed to combat rapid biotype evolution. In this study, we screened 1,021 soybean Plant Introductions (PIs) for resistance to 3 known biotypes of A. glycines. Based on a series of growth chamber and field screenings, we identified 11 PIs which showed resistance against biotype 1 of A. glycines. Among these 11 PIs, 7 PIs were resistant to biotype 2 and 5 PIs were resistant to biotype 3. Further, 2 PIs showed resistance against all 3 biotypes of A. glycines. We also identified 11 PIs that were potentially tolerant to A. glycines, illustrated by no adverse impact on plant quality. Since resistant PIs identified in this study belong to MG II-IV they can be readily crossed to early maturing cultivars adapted to North-Central states of the US, where A. glycines is a major pest. The genetic characterization of resistance in these PIs and incorporation of the novel resistant genes into elite soybean cultivars will broaden the defense against multiple biotypes of A. glycines.

Last Modified: 4/16/2014
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