Making waves: Comparative analysis of gene drive spread characteristics in a continuous space model

Area of Science:

• Genetics
• Population Biology
• Ecology

Background:

• Gene drives offer powerful tools for modifying or suppressing target populations.
• Previous modeling studies on gene drives often focused on outcomes rather than fundamental properties in continuous space.
• Experimental realization of various gene drive types has opened new possibilities for population modification.

Purpose of the Study:

• To conduct a comparative analysis of different gene drive types in continuous space environments.
• To evaluate gene drive wave speed as a function of drive performance and ecological parameters.
• To understand the fundamental properties and performance differences of gene drives in panmictic versus spatial settings.

Main Methods:

• Utilized individual-based simulations in continuous space to model gene drive dynamics.
• Compared the performance of various gene drive types capable of forming a wave of advance.
• Assessed the impact of fitness costs and CRISPR cleavage activity on drive performance.

Main Results:

• Gene drive performance differs significantly between panmictic and spatial environments.
• Suppression drive waves are particularly sensitive to fitness costs and maternal CRISPR cleavage.
• Some gene drive types demonstrate robust performance even with variable efficiency parameters.
• Wild-type allele removal rate correlates with gene drive wave speed in panmictic settings.

Conclusions:

• Gene drive performance in continuous space is complex and influenced by multiple factors.
• Understanding these spatial dynamics is crucial for effective gene drive deployment.
• This research provides a valuable resource for predicting gene drive behavior in realistic ecological scenarios.