Registration of ‘R19C‐1012’: A high‐yielding soybean cultivar with improved flooding tolerance at early vegetative stages

Abstract ‘R19C‐1012’ (Reg. no. CV‐564, PI 707837) is a high‐yielding, conventional maturity group Mid‐IV (Relative maturity 4.6) soybean [ Glycine max (L.) Merr.] cultivar with improved flooding tolerance at V2–V4 vegetative growth stages. It was developed and released by the University of Arkansas System–Division of Agriculture Research & Extension Center in 2024. R19C‐1012 has an indeterminate growth habit, purple flowers, gray pubescence, brown pods, and seed with an imperfect black hilum. From 2019 to 2023, R19C‐1012 was evaluated across 40 irrigated environments, with an average grain yield of 4302 kg ha −1 , representing 93% and 99% relative yield of the Xtend and non‐Xtend checks, respectively. Under flooding conditions at V2–V4 vegetative growth stages, R19C‐1012 outperformed the checks with a relative yield advantage of +158%. In irrigated conditions, seed of R19C‐1012 contains 397 g kg −1 and 219.4 g kg −1 of protein and oil content on a dry weight basis, respectively, and weigh 12.3 g 100 seeds −1 . It has resistance to brown stem rot (caused by Phialophora gregata ) and stem canker (caused by Diaporthe phaseolorum var. aspalathi ) and has tolerance to sulfonylurea herbicides. R19C‐1012 provides Mid‐South US growers with resilience and flexibility in their cropping systems by mitigating yield losses under flooding conditions, while also offering seed cost savings. This is particularly beneficial in flood‐prone areas destined for crop rotation systems with rice ( Oryza sativa ). As a non‐GMO soybean cultivar, it presents opportunities for high‐value markets with premium prices. Furthermore, R19C‐1012 is a valuable genetic resource for soybean breeding programs focused on improving flooding tolerance.