Location: Corn, Soybean and Wheat Quality ResearchTitle: Registration of the Maize Synthetic Population OhMCMV-1
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/25/2021
Publication Date: 1/3/2022
Citation: Jones, M.W., Ohlson, E.W. 2022. Registration of the Maize Synthetic Population OhMCMV-1. Journal of Plant Registrations. 16(2):394-399. https://doi.org/10.1002/plr2.20195.
Interpretive Summary: Maize lethal necrosis (MLN) is one of the most devastating diseases of maize. MLN is caused by the synergistic interaction between two maize viruses, maize chlorotic mottle virus (MCMV) and a second virus in the Potyviradae family. An ongoing epidemic in East Africa and the presence of MCMV and maize infecting potyviruses in the United States has spurred research seeking to develop solutions for mitigating the impact of MLN. One of the most effective solutions is the development and deployment of MLN resistant maize varieties, considering the cost effectiveness and environmental friendliness of such an approach. The Corn, Soybean, and Wheat Quality Research Unit has developed and released the OhMCMV-1 (C1) synthetic maize population, which contains elite resistance to MLN, MCMV, and the potyvirus sugarcane mosaic virus (SCMV). This population was developed from five MCMV resistant maize lines using recurrent selection. Based on a single cycle of selection, resistance to MLN, MCMV, and SCMV was improved significantly. This population will be valuable for breeders working to develop MLN and virus resistant maize varieties.
Technical Abstract: 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 (C1) 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.