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Review
. 2020 Oct;33(10):1345-1360.
doi: 10.1111/jeb.13693. Epub 2020 Sep 24.

Resistance to natural and synthetic gene drive systems

Affiliations
Review

Resistance to natural and synthetic gene drive systems

Tom A R Price et al. J Evol Biol. 2020 Oct.

Abstract

Scientists are rapidly developing synthetic gene drive elements intended for release into natural populations. These are intended to control or eradicate disease vectors and pests, or to spread useful traits through wild populations for disease control or conservation purposes. However, a crucial problem for gene drives is the evolution of resistance against them, preventing their spread. Understanding the mechanisms by which populations might evolve resistance is essential for engineering effective gene drive systems. This review summarizes our current knowledge of drive resistance in both natural and synthetic gene drives. We explore how insights from naturally occurring and synthetic drive systems can be integrated to improve the design of gene drives, better predict the outcome of releases and understand genomic conflict in general.

Keywords: Wolbachia; CRISPR-Cas9; fitness costs; meiotic drive; population suppression; selfish genetic elements; sex ratio distorter; transposable element.

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Conflict of interest statement

Conflicts of Interest Statement

The authors state they have no conflicts of interest to declare.

Figures

Figure 1.
Figure 1.
The evolutionary impact of a gene drive, as measured by the magnitude and location of costs imposed (yellow/red gradients). Boxes represent individuals, white rectangles are chromosomes within the organism. Drive creates selection pressure for the three drive resistance mechanisms discussed in this review (blue). The selection pressure for drive resistance is highest at the target locus itself (1a), where rivalling homologous genes suffer both from reduced transmission due to drive (yellow) and (potential) fitness costs to the organism (red). Selection pressure on unlinked loci throughout the genome to disrupt drive will be a function of organismal drive costs (1b). Finally, gene drive may create selection for mechanisms that suppress the drive at the population level (2).

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