Registration of R18-14147: A high-protein conventional soybean germplasm line

Abstract

R18-14147 (Reg. no. GP-528, PI 705143) is a high-protein conventional soybean [Glycine max (L.) Merr.] germplasm of maturity group Mid-IV developed and released by the University of Arkansas System – Division of Agriculture Research & Extension in 2023. The germplasm is an F_3:4 selection from the cross LG10-3671-1 × R09-430. Plants of R18-14147 have an indeterminate growth habit with purple flowers, gray pubescence, brown pod wall, and imperfect black hilum. Across 28 environments in Arkansas (2019–2022), R18-14147 yield averaged 4482 kg ha⁻¹, with broad adaptability and yield stability. Seed of R18-14147 contains on average 429 g kg⁻¹ and 191 g kg⁻¹ of protein and oil on a dry weight basis, respectively, and seed weight is 15.2 g 100 seeds⁻¹. The average seed protein content of this line is 8%–27% higher than the average protein content of the check cultivars used in various trials to evaluate R18-14147. Additionally, R18-14147 has been identified as resistant to stem canker. R18-14147 presents soybean growers in the mid-southern United States with a promising germplasm alternative combining high yield potential and elevated seed protein content for alternative crop rotation in herbicide-tolerant cultivar systems, offering potentially seed-saving cost benefits and serving as a valuable germplasm for new cultivar development.