Expansion of the genetic toolbox for manipulation of the global crop pest Drosophila suzukii: Isolation and assessment of eye colour mutant strains.

Autor: Yadav AK; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina, USA., Asokan R; ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka, India., Yamamoto A; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina, USA., Patil AA; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina, USA., Scott MJ; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina, USA.
Jazyk: angličtina
Zdroj: Insect molecular biology [Insect Mol Biol] 2024 Apr; Vol. 33 (2), pp. 91-100. Date of Electronic Publication: 2023 Oct 11.
DOI: 10.1111/imb.12879
Abstrakt: Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), commonly called spotted wing Drosophila, is an important agricultural pest recognised worldwide. D. suzukii is a pest of soft-skinned fruits as females can lay eggs in ripening fruit before harvest. While strains for genetic biocontrol of D. suzukii have been made, the development of transgenic D. suzukii strains and their further screening remain a challenge partly due to the lack of phenotypically trackable genetic-markers, such as those widely used with the model genetic organism D. melanogaster. Here, we have used CRISPR/Cas9 to introduce heritable mutations in the eye colour genes white, cinnabar and sepia, which are located on the X, second and third chromosomes, respectively. Strains were obtained, which were homozygous for a single mutation. Genotyping of the established strains showed insertion and/or deletions (indels) at the targeted sites. A strain homozygous for mutations in cinnabar and sepia showed a pale-yellow eye colour at eclosion but darkened to a sepia colour after a week. The fecundity and fertility of some of the cinnabar and sepia strains were comparable with the wild type. Although white mutant males were previously reported to be sterile, we found that sterility is not fully penetrant and we have been able to maintain white-eyed strains for over a year. The cinnabar, sepia and white mutant strains developed in this study should facilitate future genetic studies in D. suzukii and the development of strains for genetic control of this pest.
(© 2023 The Authors. Insect Molecular Biology published by John Wiley & Sons Ltd on behalf of Royal Entomological Society.)
Databáze: MEDLINE
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