Prospects for transgenesis in the chick.

Area of Science:

• Animal Biotechnology
• Developmental Biology
• Genetics

Background:

• Genetic modification is a vital tool for studying gene function, established in mice since the 1980s.
• Chick embryo manipulation is possible but inefficient, hindering genetic studies.
• Advances in pluripotent embryo stem cells and germ cell transfer show promise for chicken genetic modification.

Purpose of the Study:

• To review the current state and challenges in developing genetic modification methods for chickens.
• To explore the potential of embryo stem cells and primordial germ cell transfer for creating transgenic birds.
• To assess the feasibility of using viral vectors for efficient germline transmission in chickens.

Main Methods:

• Review of existing research on chick genetic modification techniques.
• Analysis of methods involving embryo stem cells and primordial germ cell manipulation.
• Evaluation of retroviral and lentiviral vector applications in avian transgenesis.

Main Results:

• Chick zygote manipulation is currently inefficient.
• Pluripotent embryo stem cells can contribute to chimeric birds, but germline transmission is not yet established.
• Primordial germ cell transfer is possible, but genetic modification and subsequent germline recovery have not been achieved.

Conclusions:

• Efficient germline transmission remains a significant hurdle for chicken transgenesis.
• Lentiviral vectors offer potential for transgenic production, despite current limitations.
• Future advancements are expected to enable transgenesis as a tool for chick development studies and biotechnology.