Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Production of chickens with green fluorescent protein-knockin in the Z chromosome and detection of green fluorescent protein-positive chicks in the embryonic stage

  • Kyung Soo Kang (Depatment of Bio Life Science, ShinGu University) ;
  • Seung Pyo Shin (Institute of Green-Bio Science and Technology, Seoul National University) ;
  • In Su Ha (Institute of Green-Bio Science and Technology, Seoul National University) ;
  • Si Eun Kim (Graduate School of International Agricultural Technology, Seoul National University) ;
  • Ki Hyun Kim (Graduate School of International Agricultural Technology, Seoul National University) ;
  • Hyeong Ju Ryu (Graduate School of International Agricultural Technology, Seoul National University) ;
  • Tae Sub Park (Institute of Green-Bio Science and Technology, Seoul National University)
  • Received : 2022.10.21
  • Accepted : 2023.01.26
  • Published : 2023.06.01
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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 primordial germ cells (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.

Keywords

Acknowledgement

This work was supported by Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ01621901), Rural Development Administration and the National Research Foundation of Korea grant funded by the Korea government (MEST) (NRF-2021R1A2C1012056), Republic of Korea.

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