AI Article Synopsis
- Viral pathogens threaten stable crop production, prompting research on BPH-resistant rice varieties through a backcross strategy.
- Integrating a dominant resistance gene into a high-yield but BPH-susceptible rice leads to enhanced resistance, but results in sterile plants with symptoms like panicle enclosure and poor seed production.
- Deep sequencing reveals eight new virus species and highlights rice plant immune responses, indicating that multiple viral infections may contribute to sterility in these plants.
Article Abstract
Viral pathogens are a major threat to stable crop production. Using a backcross strategy, we find that integrating a dominant brown planthopper (BPH) resistance gene into a high-yield and BPH-susceptible rice variety significantly enhances BPH resistance. However, when -carrying backcross lines are infested with BPH, these BPH-resistant lines exhibit sterile characteristics, displaying panicle enclosure and failure of seed production at their mature stage. As we suspected, BPH-mediated viral infections could cause the observed sterile symptoms, and we characterized rice-infecting viruses using deep metatranscriptomic sequencing. Our analyses revealed eight novel virus species and five known viruses, including a highly divergent virus clustered within a currently unclassified family. Additionally, we characterized rice plant antiviral responses using small RNA sequencing. The results revealed abundant virus-derived small interfering RNAs in sterile rice plants, providing evidence for Dicer-like and Argonaute-mediated immune responses in rice plants. Together, our results provide insights into the diversity of viruses in rice plants, and our findings suggest that multiple virus infections occur in rice plants.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8708968 | PMC |
| http://dx.doi.org/10.3390/v13122464 | DOI Listing |
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