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Maize head smut (MHS) caused by the fungi  Sporisorium reilianum  (Kühn) Landon and Fullerton ( S. reilianum ) is the most serious disease occurred in China recently. There are only a few reports concerning the genetics of this disease and the resistant gene of maize. In this paper a new dominant resistant gene to MHS caused by the pathogen Shenyang-1 of  S. reilianum  was discovered from a newly developed resistant inbred line ‘R24’ and was named  RsrR. RsrR  gene was molecular tagged and mapped on the long arm of maize chromosome 1 via simple sequence repeat-bulked segregant analysis (SSR-BSA) and sequence related amplified polymorphism (SRAP)-BSA analysis, the nearest linkage marker is 2.5 cM apart from the  RsrR  gene. The gene  RsrR  has been transferred into two elite maize inbred lines, ‘Huangzao4’ and ‘Qi319’, through traditional hybridization and marker assisted selection. The converted lines can be used in maize MHS-resistance breeding.

Characterization and molecular mapping of RsrR, a resistant gene to maize head smut