Registration of soybean germplasm R11-7999 with high seed protein content and high yield

The conventional (non-genetically modified) soybean [Glycine max (L.) Merr.] germplasm line R11-7999 (Reg. no. GP-436, PI691646) was released by the Arkansas Agricultural Experiment Station in 2018 because of its high seed protein content and high yield potential. R11-7999 is an F-4 selection from the cross between the Tennessee cultivar '5002T' and the Arkansas advanced breeding line R00-2097. Trial testing results of over 30 environments in Arkansas and other southern states shows that R11-7999 is well adapted and exhibits high yield performance. R11-7999 has a relative maturity of 5.7, determinate growth habit, purple flowers, tawny pubescence, and a tan pod wall at maturity. Seed of R11-7999 has yellow cotyledons with dull yellow seed coat and brown and black hilum. It is resistant to stem canker and moderately resistant to frogeye leaf spot. R11-7999 has a seed protein content of 439 g kg(-1) (dry weight), which combined with the seed oil (202 g kg(-1)) content produces 50.7% protein in the meal fraction. The high yield and high protein content of R11-7999 will make it a valuable cultivar for animal feed and protein isolate.