Location: Soybean and Nitrogen Fixation ResearchTitle: Registration of USDA-N6005 germplasm combining high yield, elevated protein and 25% pedigree from Japanese cultivar Tamahikari
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/19/2021
Publication Date: 5/5/2021
Citation: Mian, R.M., Mcneece, B.T., Gillen, A.M., Carter Jr, T.E., Bagherzadi, L. 2021. Registration of USDA-N6005 germplasm combining high yield, elevated protein and 25% pedigree from Japanese cultivar Tamahikari. Journal of Plant Registrations. https://doi.org/10.1002/plr2.20139.
Interpretive Summary: USDA-N6005 is new soybean germplasm release that successfully combines genetic diversity with high yield and improved meal protein. Utilization of this novel release in future U.S. soybean breeding will be helpful in reversing the long-term decline in genetic diversity and seed protein of soybean without any negative impact on seed yield.
Technical Abstract: USDA-N6005 soybean [Glycine max (L.) Merr.] (Reg. No…, PI.XX), is an F5 - derived early maturity group (MG) VI germplasm jointly released by U.S. Department of Agriculture-Agricultural Research Service, U.S.A. (USDA-ARS) and North Carolina Agricultural Research Service in xx 2020. USDA-N6005 is a genetically diverse germplasm with 25% of its pedigree from Japanese cultivar ‘Tamahikari’ and has high yield potential coupled with elevated seed and meal protein content. USDA-N6005 is the first MG VI release derived from ‘Tahmahikari’. Meal protein contents of many current U.S. commercial soybean cultivars are lower than the market standard. In the USDA Uniform Tests-Southern States (USDA Uniform Tests) during 2017-2018, USDA-N6005 yielded 102, 103, and 102% of the check cultivars NC-Dunphy, NC-Dilday and NC-Roy, respectively. It had significantly better lodging resistance (1.5) than NC-Roy and NC-Dilday (2.6 and 2.5, respectively). The seed protein content on dry basis of USDA-N6005 (424 g kg-1) was significantly higher than that of NC-Dunphy and NC-Dilday (392 and 383 g kg-1, respectively), and similar to that of NC-Roy (423 g kg-1). The estimated meal protein content (49.0%) of USDA-N6005 was significantly higher than that of NC-Dunphy and NC-Dilday (46.2% and 45.5%, respectively), and similar to that of NC-Roy (49.2%). Across 5 environments of the 2016 USDA Preliminary Tests-Southern States (USDA Preliminary Tests), USDA-N6005 yielded 100 and 102% of check cultivars AG6534 and NC-Roy, respectively. This release should help to reverse the declining trend in genetic diversity and seed protein of U.S. soybean cultivars without negative impact on seed yield.