A timely, user-friendly, and flexible marker-assisted speed congenics method.

Area of Science:

• Genetics
• Animal Models
• Genomic Research

Background:

• Mice are crucial mammalian models in research, with genome manipulation offering significant advantages.
• Transgenic mouse development often requires time-consuming gene introgression into specific mouse lines.
• Speed congenics offers a faster alternative but is limited by the need for informative genetic markers.

Purpose of the Study:

• To develop and present a comprehensive set of genetic markers for efficient speed congenics in mice.
• To facilitate the rapid introgression of genes of interest across commonly used mouse strains.
• To address the limitations of speed congenics by providing a practical marker panel solution.

Main Methods:

• Development and selection of 255 microsatellite markers and 10 RFLPs (Restriction Fragment Length Polymorphisms).
• Creation of 18 distinct marker panels tailored for specific mouse strain crosses.
• Analysis of genetic markers to assess donor and receiver genome proportions across generations.

Main Results:

• A robust panel of 265 genetic markers (255 microsatellites, 10 RFLPs) was established for speed congenics.
• The marker panels enable efficient and accelerated gene introgression between key mouse strains.
• Marker analysis revealed a lack of isogeny in some commercially available inbred mouse lines.

Conclusions:

• The presented marker panels significantly enhance the speed and efficiency of creating transgenic mouse models.
• This resource streamlines the process of gene introgression, benefiting biomedical research.
• The findings highlight the importance of genetic marker validation for maintaining mouse line integrity.