ST 2454R is a new Roundup Ready® variety that will be marketed under the Stoneville Texas brand. The variety was developed through a backcross program using ‘ST 132’ (two backcrosses) and ‘ST 239’ (one backcross) as recurrent parents. In 1999-2000 trials, lint yield of ST 2454R was similar to ST 239 and the Paymaster check varieties, PM2326RR and PM2200RR in the Texas High Plains. Lint yield in other parts of Texas was similar to Deltapine check varieties DP420RR and DP436RR. Fiber quality of ST 2454R was similar to the Paymaster checks except that micronaire was lower than PM 2326RR and length was slightly shorter than PM2200RR. ST 2454R was significantly early earlier maturing than the Paymaster checks.