Silk is the main sexual organs of maize, and the normal development and morphogenesis of silk is crucial for the reproduction and yield of seed. We found a natural mutant sk-A7110 that showed an exhaustive deletion of silk, which makes itself suffer the abortion of seed on account of no pollination. Genetic analysis indicates that the mutation is controlled by a single recessive nucleus gene SKA7110. The SKA7110 is localized in a 255kp physical distance between the markers SAG21 and IDP1453 on chromosome 2 according to the gene mapping result by using bulked segregation analysis. The work of this study provides a basis for cloning and functional analysis of SKA7110.