Evolutionary Simulations of -linked Suppression Gene Drives
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Synthetic gene drives may soon be used to suppress or eliminate populations of disease vectors, pathogens, invasive species, and agricultural pests. Recent proposals have focused on using -linked gene drives to control species with sex determination, which include Lepidopteran pests, parasitic trematodes, and cane toads. These proposals include -linked '-shredders', which would suppress populations by cleaving the chromosome and causing females to produce only sons, as well as -linked female-sterilizing gene drives. Here, I use eco-evolutionary simulations to evaluate the potential of some proposed -linked gene drives, and to produce recommendations regarding their design and use. The simulations show that -shredders are likely to be highly effective at eradicating populations provided that resistance to -shredding cannot evolve. However, -shredder alleles can invade populations from very low frequencies, making it difficult to eliminate specific populations while leaving nearby populations untouched; this issue may restrict their possible uses.
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