Kang KS, Shin SP, Ha IS, Kim SE, Kim KH, Ryu HJ, Park TS. Production of chickens with GFP-knockin in the Z chromosome and detection of GFP-positive chicks in the embryonic stage.
Anim Biosci 2023;
36:973-979. [PMID:
36915940 PMCID:
PMC10164537 DOI:
10.5713/ab.22.0405]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/26/2023] [Indexed: 02/27/2023] Open
Abstract
Objective
The clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) system, which is the most efficient and reliable tool for precisely targeted modification of the genome of living cells, has generated considerable excitement for industrial applications as well as scientific research. In this study, we developed a gene-editing and detection system for chick embryo sexing during the embryonic stage.
Methods
By combining the CRISPR/Cas9 technical platform and germ cell-mediated germline transmission, we not only generated Z chromosome-targeted knockin chickens but also developed a detection system for fluorescence-positive male chicks in the embryonic stage.
Results
We targeted a green fluorescent protein (GFP) transgene into a specific locus on the Z chromosome of chicken PGCs, resulting in the production of ZGFP-knockin chickens. By mating ZGFP-knockin females (ZGFP/W) with wild males (Z/Z) and using a GFP detection system, we could identify chick sex, as the GFP transgene was expressed on the Z chromosome only in male offspring (ZGFP/Z) even before hatching.
Conclusion
Our results demonstrate that the CRISPR/Cas9 technical platform with chicken PGCs facilitates the production of specific genome-edited chickens for basic research as well as practical applications.
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