The invention provides a targeting sgRNA for pig CD163
gene editing, a modification vector, and a preparation method and application thereof, which relate to the technical field of
gene engineering. The sgRNA and the
gene modification vector provided by the invention have high specificity, and can be used for efficiently editing a pig CD163 gene on a
cell level through a
CRISPR / Cas9n
system. According to the preparation method of a blue-eared
disease resistant pig provided by the invention, a blue-eared
disease virus receptor is damaged, the
target gene CD163 is edited, no other exogenous gene is intruded, no non-specific editing is carried out on a non-CD163 gene area on a
genome, a genetic background is clean and clear, and the work of later
transgene safety evaluation is greatly reduced. The blue-eared
disease resistant pig obtained by utilizing the invention can be ensured to survive normally, and resists the infection of a blue-eared disease
virus, so that the economic loss caused by the blue-eared disease in pig husbandry is greatly reduced.