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- W3028986536 abstract "Abstract In this manuscript, we report that clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 is highly efficient in the hemipteran Oncopeltus fasciatus. The white gene is well characterized in Drosophila where mutation causes loss of eye pigmentation; white is a reliable marker for transgenesis and other genetic manipulations. Accordingly, white has been targeted in a number of nonmodel insects to establish tools for genetic studies. Here, we generated mutations in the Of-white (Of-w) locus using CRISPR/Cas9. We found that Of-w is required for pigmentation throughout the body of Oncopeltus, not just the ommatidia. High rates of somatic mosaicism were observed in the injected generation, reflecting biallelic mutations, and a high rate of germline mutation was evidenced by the large proportion of heterozygous G1s. However, Of-w mutations are homozygous lethal; G2 homozygotes lacked pigment dispersion throughout the body and did not hatch, precluding the establishment of a stable mutant line. Embryonic and parental RNA interference (RNAi) were subsequently performed to rule out off-target mutations producing the observed phenotype and to evaluate the efficacy of RNAi in ablating gene function compared to a loss-of-function mutation. RNAi knockdowns phenocopied Of-w homozygotes, with an unusual accumulation of orange granules observed in unhatched embryos. This is, to our knowledge, the first CRISPR/Cas9-targeted mutation generated in Oncopeltus. While we were unable to establish white as a useful visible marker for Oncopeltus, these findings are instructive for the selection of visible markers in nonmodel species and reveal an unusual role for an ortholog of a classic Drosophila gene." @default.
- W3028986536 created "2020-06-05" @default.
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- W3028986536 date "2020-08-01" @default.
- W3028986536 modified "2023-10-15" @default.
- W3028986536 title "High-Efficiency CRISPR/Cas9 Mutagenesis of the <i>white</i> Gene in the Milkweed Bug <i>Oncopeltus fasciatu</i>s" @default.
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- W3028986536 doi "https://doi.org/10.1534/genetics.120.303269" @default.
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