Abstract
The Pacific oyster (Crassostrea gigas) is a representative bivalve mollusc that is widely cultured in the world. In recent years, it has become an important model species for ecological, evolutionary, and developmental studies because of its ability to survive in extreme environmental conditions as a sessile filter feeder and its classical mosaic pattern of development. Although the complete genome sequence of C. gigas is available and omics data have been rapidly generated for the past few years, the genetic tools for gene functional studies have thus far been limited to RNA interference technology. In this study, we developed a gene editing system for C. gigas based on CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 ribonucleoprotein complexes. Two candidate genes, myostatin (MSTN) and Twist, were selected as targets. After microinjecting CRISPR/Cas9 ribonucleoprotein complexes into fertilized eggs, CRISPR-induced indel mutations were detected in the target genes. The CRISPR/Cas9-induced mutations were predominantly small indel mutations ranging in size from 1 to 24 bp in these two target genes. These results demonstrate that CRISPR/Cas9 can be successfully used as an effective targeted gene editing sy...Continue Reading
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