Registration of the maize synthetic population OhMCMV‐1.

Maize lethal necrosis (MLN) is a devastating virus disease of maize, induced by co‐infection by Maize chlorotic mottle virus (MCMV) and one of several potyviruses. The maize synthetic population OhMCMV‐1 (Cycle‐1 [C1]) (Reg. no. GP‐623, PI 699306) was developed and released by the USDA‐ARS Corn, Soybean, and Wheat Quality Research Unit as a germplasm resource for improved MLN, MCMV, and Sugarcane mosaic virus (SCMV) resistance. The population has undergone one complete cycle of S1 recurrent selection for resistance to MCMV. Cycle‐1 S1 lines were significantly more resistant to MLN, MCMV, and SCMV than Cycle‐0 S1 lines. The elite virus resistance present within OhMCMV‐1 (C1) indicates this population has strong utility for developing new breeding lines, hybrids, and varieties and for helping to mitigate the economic impact of MLN. Core Ideas: Maize lethal necrosis is a devastating virus disease of maize.Genetic enhancement of maize germplasm is desirable for mitigating the impact of virus diseases.Recurrent selection is an effective strategy for improving resistance to maize lethal necrosis.The synthetic population OhMCMV‐1 is a valuable resource for developing maize lines with elite virus resistance. [ABSTRACT FROM AUTHOR]