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ARS Home » Southeast Area » Raleigh, North Carolina » Soybean and Nitrogen Fixation Research » Research » Publications at this Location » Publication #319840
Title: Registration of ‘Wyandot-14’ soybean with resistance to soybean aphid and powdery mildew

Author
item Mian, Rouf
item MCHALE, LEAH - The Ohio State University
item MICHEL, ANDREW - The Ohio State University
item DORRANCE, ANNE - The Ohio State University

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/19/2016
Publication Date: 5/31/2016
Citation: Mian, R.M., Mchale, L.K., Michel, A.P., Dorrance, A.E. 2016. Registration of ‘Wyandot-14’ soybean with resistance to soybean aphid and powdery mildew. Journal of Plant Registrations. 10:246-250.

Interpretive Summary: The soybean aphid is the number one insect pest of soybean in North Central USA and several nearby Canadian provinces. Development of soybean cultivars with resistance to the aphid is needed to control this insect in an environmentally friendly way. USDA-ARS scientists in collaboration with Ohio State University researchers have identified soybean plant introductions (PIs) with resistance to the soybean aphid and molecularly mapped several genetic loci responsible for resistance to the aphid using those PIs. The Rag2 (Resistance to Aphis glycines) allele from PI243540 identified in this effort was transferred into the popular food grade soybean cultivar ‘Wyandot’ by backcross breeding to develop ‘Wyandot-14’ with resistance to biotype 1 and 2 of the soybean aphid. Wyandot-14 was released as a maturity group II (2.9) conventional soybean cultivar in 2014. This cultivar has same agronomic performances as Wyandot in the absence of soybean aphid pressure, however, it yielded significantly better than Wyandot in soybean aphid infested fields. Additionally, it has resistance to powdery mildew that is occasionally a problem in soybean production in North Central USA. Wyandot-14 should be a good cultivar for the growers of conventional soybeans in areas where soybean aphid and/or powdery mildew are present.

Technical Abstract: ‘Wyandot-14’ soybean [Glycine max (L.) Merr.] with resistance to soybean aphid biotypes 1 and 2 and resistance to powdery mildew was jointly released by the USDA-Agricultural Research Service and The Ohio Agricultural Research and Development Center (OARDC) as a late maturity group (MG) II (2.9) food-grade conventional cultivar. Soybean aphid (Aphis glycines) is the number one insect pest of soybean in USA. The objective of this research was to incorporate soybean aphid and powdery mildew (Microsphaera diffusa) resistance into the popular food-grade soybean cultivar ‘Wyandot’. Wyandot-14 was developed by backcrossing the Rag2 and Rmd_PI243540 alleles for resistance to soybean aphid and powdery mildew, respectively, from PI243540 into cultivar Wyandot. Compared to Wyandot, Wyandot-14 showed no yield drag in the absence of soybean aphid and/or powdery mildew pressures. In soybean aphid infested fields, Wyandot-14 had significantly higher yield than Wyandot. Like Wyandot, Wyandot-14 has white flower, grey pubescence, brown pod, round seed with shiny yellow seed coat and yellow (clear) hilum color and indeterminate growth habit. Wyandot-14 should be an excellent replacement for cultivar Wyandot.