Abstract
Molecular mechanisms underlying wing evolution and development have been a point of scientific inquiry for decades. Phloem-feeding aphids are one of the most devastating global insect pests, where dispersal of winged morphs lead to annual movements, migrations, and range expansions. Aphids show a polyphenic wing dimorphism trait, and offer a model to study the role of environment in determining morphological plasticity of a single genotype. Despite recent progresses in the genetic understanding of wing polyphenism, the influence of environmental cues remains unclear. To investigate the involvement of miRNAs in wing development, we sequenced small RNA libraries of the English grain aphid, Sitobion avenae (F.) across six different developmental stages. As a result, we identified 113 conserved and 193 S. avenae-specific miRNAs. Gene Ontology and KEGG pathway analyses of putative target mRNAs for the six differentially expressed miRNAs are enriched for wing development processes. Dietary uptake of miR-263a, miR-316, and miR-184a agomirs and antagomirs led to significantly higher mortality (>70%) and a lower proportion of winged morphs (<5%). On the other hand, wing malformation was observed in miR-2 and miR-306 agomirs and miR-2 and miR-14 antagomirs, respectively, suggesting their involvement in S. avenae wing morphogenesis. These combined results not only shed light on the regulatory role of miRNAs in wing dimorphism, but also provide potential novel targets for the long-term sustainable management of S. avenae, a devastating global grain pest.
Original language | English |
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Article number | 103579 |
Journal | Insect Biochemistry and Molecular Biology |
Volume | 142 |
DOIs | |
State | Published - Mar 2022 |
Bibliographical note
Funding Information:This research was supported by the National Natural Science Foundation of China (Award number: 31772163), National Key Research and DevelopmentFoundation, Ministry of Science and Technology of China (Award number: 2016YFD0300705), China Agriculture Research System of MOF and MARA (Award number: CARS-3). The information reported in this paper is part of a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Contributions by BSC was supported by the United States Department of Agriculture (USDA) Agricultural Research Service (ARS) (CRIS Project 5030-22000-019-00D) and the Iowa Agriculture and Home Economics Experiment Station, Ames, IA (Project 3543). Any mention of products or services is for research purposes only, and does not constitute an endorsement for use by USDA. USDA is an equal opportunity employer and provider. Authors would like to thank anonymous reviewers for their constructive criticisms and comments to improve this manuscript.
Funding Information:
This research was supported by the National Natural Science Foundation of China (Award number: 31772163), National Key Research and Development Foundation, Ministry of Science and Technology of China (Award number: 2016YFD0300705), China Agriculture Research System of MOF and MARA (Award number: CARS-3). The information reported in this paper is part of a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Contributions by BSC was supported by the United States Department of Agriculture ( USDA ) Agricultural Research Service ( ARS ) (CRIS Project 5030-22000-019-00D) and the Iowa Agriculture and Home Economics Experiment Station, Ames, IA (Project 3543). Any mention of products or services is for research purposes only, and does not constitute an endorsement for use by USDA. USDA is an equal opportunity employer and provider. Authors would like to thank anonymous reviewers for their constructive criticisms and comments to improve this manuscript.
Publisher Copyright:
© 2021
Keywords
- Developmental stages
- Functional analysis
- Sitobion avenae
- Wing
- miRNA
ASJC Scopus subject areas
- Biochemistry
- Molecular Biology
- Insect Science