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.