Registration of ‘TN14‐5021’, a conventional soybean cultivar with elevated seed protein and resistance to soybean cyst nematode races 2, 3, and 5

Abstract

TN14-5021' (Reg. no. CV-543, PI 699124) is a late maturity group IV (relative maturity 4.9) determinate conventional soybean [Glycine max (L.) Merr.] cultivar developed and released by the University of Tennessee soybean breeding program. Soybean cultivars with resistance to soybean cyst nematode (SCN) race 2 are rare, but race 2 is becoming a predominant SCN population infecting farmers' fields in regions of the U.S. Southeast and Mid-South. TN14-5021 also conveys resistance to stem canker [caused by Diaporthe phaseolorum (Cooke & Ellis) Sacc. var. caulivora K.L. Athow & R.M. Caldwell] and strong resistance to SCN races 3 and 5. In replicated trials across 70 environments from the Mid-South to the Southeast, TN-5021 showed high yield potential and adaptation to a broad range of growing conditions. TN14-5021 has white flowers and gray pubescence. The pods have a tan pod coat, and the seeds are yellow with smooth seed coats. Across 48 environments over a 4-yr period,with testing locations from Kansas to Alabama, TN14-5021 averaged 406 and 226 g kg -1 protein and oil content, respectively. In comparison, the average protein and oil content of commercial cultivars grown in the same tests averaged 397 and 224 g kg -1 , respectively. Its high yield coupled with elevated seed protein concentration and nematode resistance package make TN14-5021 a valuable cultivar for Tennessee and the Mid-South region.