The invention belongs to the technical field of
plant genetic engineering, and particularly relates to application of corn
casein kinase ZmCK2 beta or a coding
gene thereof in regulation and control of corn resistance to corn yellow
mosaic virus. The
host protein ZmCK2 beta interacting with the CP is obtained through screening, it is found that ZmCK2 beta and ZmCK2 alpha can interact inside and outside a
plant body, and CP and ZmCK2 alpha only interact in the
plant body; the ZmCK2 beta and the ZmCK2 alpha-ZmCK2 beta complex in the plants are respectively silenced, and after the MaYMV is inoculated, the
virus accumulation amount on the silenced plants is reduced, which indicates that the silenced ZmCK2 beta and the silenced ZmCK2 alpha-ZmCK2 beta complex can inhibit infection; a ZmCK2 beta-knockout transgenic corn strain is constructed, and it is found that the
virus accumulation amount on the plant is also reduced after ZmCK2 beta is knocked out. The invention provides a scientific basis for deeply analyzing the MaYMV pathogenic mechanism, and lays a theoretical foundation for formulating a
virus prevention and control strategy.