Studies on Insect Genetics and Genomics

A special issue of Biology (ISSN 2079-7737). This special issue belongs to the section "Genetics and Genomics".

Deadline for manuscript submissions: 31 May 2027 | Viewed by 1633

Special Issue Editor


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Guest Editor
Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
Interests: novel sequencing technologies; genomics-editing methods; sex chromosome origins; horizontal gene transfer; resource insects; eco-friendly insect control technologies; genomics; ecology; molecular biology; insect

Special Issue Information

Dear Colleagues,

Insects, as the most species-rich group on Earth, serve as both major biological agents of crop damage and valuable bio-resources with significant economic potential. Balancing the utilization of insect resources with ecological pest control has become a key research focus. A thorough understanding of insect genomic features and their genetic mechanisms is the fundamental scientific basis for achieving this goal.

With the rapid advancement of modern genome-editing technologies, we now possess the following research potential:

  1. Precise genetic analysis—deciphering the hereditary traits and biological functions of insect genes to provide a theoretical foundation for the genetic improvement of resource insects.
  2. Cross-species gene transfer—directed modification of economically valuable insect genomes to enable the expression of high-value bioactive compounds.
  3. Eco-friendly pest control—developing targeted, environmentally sustainable biopesticides based on genome-editing principles.

Accordingly, this journal prioritizes the following research directions:

  • Technological innovation: development and application of novel sequencing technologies and genome-editing methods.
  • Theoretical breakthroughs: revealing evolutionary mechanisms such as sex chromosome origins and horizontal gene transfer.
  • Applied research: practical exploration of eco-friendly insect control technologies and genetic enhancement of resource insects.
  • Interdisciplinary integration: multidimensional studies combining genomics, ecology, and molecular biology.

Dr. Ying Lin
Guest Editor

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Keywords

  • novel sequencing technologies
  • genome-editing methods
  • sex chromosome origins
  • horizontal gene transfer
  • resource insects
  • eco-friendly insect control technologies
  • genomics
  • ecology
  • molecular biology
  • insect

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Published Papers (2 papers)

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Research

14 pages, 1541 KB  
Article
Curing Parthenogenesis-Inducing (PI) Wolbachia-Induced Reproductive Disorders in the Egg Parasitoid Telenomus remus
by I-Cheng Tu, Ching-Ting Lai and Li-Hsin Wu
Biology 2026, 15(3), 210; https://doi.org/10.3390/biology15030210 - 23 Jan 2026
Viewed by 672
Abstract
Wolbachia is an endosymbiotic bacterium widespread in invertebrates that causes various reproductive effects, including cytoplasmic incompatibility, feminization, male killing, and the induction of parthenogenesis (PI). PI-Wolbachia wRem converts Telenomus remus, an egg parasitoid of Spodoptera frugiperda, from arrhenotokous reproduction (male-producing) [...] Read more.
Wolbachia is an endosymbiotic bacterium widespread in invertebrates that causes various reproductive effects, including cytoplasmic incompatibility, feminization, male killing, and the induction of parthenogenesis (PI). PI-Wolbachia wRem converts Telenomus remus, an egg parasitoid of Spodoptera frugiperda, from arrhenotokous reproduction (male-producing) to thelytokous reproduction (female-producing). Long-term symbiosis between egg parasitoids and Wolbachia has been shown to lead to reproductive barriers and “female functional virginity,” causing progressive and potentially irreversible sex ratio imbalances. However, whether such reproductive barriers occur in T. remus remains unknown, which has important implications for biological control programs utilizing this parasitoid. To address this question, we cured wRem using tetracycline and conducted crossing experiments with naturally uninfected strains (W-). The results indicated that the cured strain (Wcure) retained normal sexual reproductive capability, with self-crossing fertilization rates comparable to those of W- strains. However, first-generation hybridization between Wcure and W- strains produced strongly male-biased offspring (male proportion: 94.3% and 85.8% for W-♂ × Wcure♀ and Wcure♂ × W-♀, respectively), indicating substantial reproductive incompatibility. Notably, an asymmetric pattern was observed between reciprocal crosses. In second-generation hybridization experiments, hybrid females (W-/Wcure) mated with W- or Wcure males showed markedly recovered sex ratios (male proportion: 14.3% and 15.6%, respectively), although total offspring numbers remained lower than in self-crossing groups. These results suggest that the reproductive incompatibility in T. remus differs from female functional virginity and is more consistent with mitonuclear incompatibility arising from population divergence. The partial recovery in second-generation hybrids indicates that surviving F1 hybrid females likely represent individuals selected for compatibility, rather than exhibiting progressive deterioration of sexual function. These findings offer insights into Wolbachia’s impact on parasitoid reproduction and highlight key considerations for biological control applications, underscoring the importance of evaluating reproductive barriers before deploying cured strains and preventing symbiont loss within populations. Full article
(This article belongs to the Special Issue Studies on Insect Genetics and Genomics)
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14 pages, 5613 KB  
Article
Comprehensive Identification and Male-Biased Expression Analysis of Odorant-Binding Protein Genes in the Hawaiian Flower Thrips, Thrips hawaiiensis (Thysanoptera: Thripidae)
by Qingqing Fan, Yanjun Li and Xiaodi Hu
Biology 2026, 15(2), 170; https://doi.org/10.3390/biology15020170 - 17 Jan 2026
Cited by 1 | Viewed by 521
Abstract
Olfaction is essential for key insect behaviors, such as host-seeking and mating, and is initiated by odorant-binding proteins (OBPs), which bind and transport hydrophobic odors. Thrips hawaiiensis is a major pest that infests the flowers of numerous horticultural crops, yet its chemosensory mechanisms [...] Read more.
Olfaction is essential for key insect behaviors, such as host-seeking and mating, and is initiated by odorant-binding proteins (OBPs), which bind and transport hydrophobic odors. Thrips hawaiiensis is a major pest that infests the flowers of numerous horticultural crops, yet its chemosensory mechanisms remain poorly understood. Now, the availability of its genome assembly allows us to address this gap. To this end, we performed a comprehensive exploration and comparative analysis of its OBP genes. Our genome-wide analysis identified a total of 12 OBP genes in T. hawaiiensis, whereas the repertoire across other published thrips genomes ranges from 10 to 17, a count significantly lower than that in most other insects. Notably, transcriptomic and RT-qPCR analyses revealed consistent male-biased expression of OBPs in T. hawaiiensis, supporting their role in mate-finding and foraging behaviors. Furthermore, we identified 11 chemosensory proteins (CSPs). Transcriptomic and RT-qPCR analyses revealed that these CSPs exhibit an expression pattern similar to that of the OBPs, with over half of the genes showing significantly higher expression in males. This work provides a foundational framework for future functional studies of olfactory proteins, both in T. hawaiiensis and the wider insect community. Full article
(This article belongs to the Special Issue Studies on Insect Genetics and Genomics)
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