Academic Journal
Characterization of endogenous pararetroviruses in yam (Dioscorea spp.) genomes revealed four pararetrovirus groups, including a dioscovirus-like lineage: implications for diagnostics and yam germplasm exchange.
| Τίτλος: | Characterization of endogenous pararetroviruses in yam (Dioscorea spp.) genomes revealed four pararetrovirus groups, including a dioscovirus-like lineage: implications for diagnostics and yam germplasm exchange. |
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| Συγγραφείς: | Osundahunsi BO; International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria. bolajiosundahunsi@gmail.com., Moshood L; International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria., Kolade OA; International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria., Odu BO; Department of Crop Production and Protection, Faculty of Agriculture, Obafemi Awolowo University, Ile-Ife, Nigeria., Lava Kumar P; International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria. L.Kumar@cgiar.org. |
| Πηγή: | Archives of virology [Arch Virol] 2026 Aug 07; Vol. 171 (9). Date of Electronic Publication: 2026 Aug 07. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Springer-Verlag Country of Publication: Austria NLM ID: 7506870 Publication Model: Electronic Cited Medium: Internet ISSN: 1432-8798 (Electronic) Linking ISSN: 03048608 NLM ISO Abbreviation: Arch Virol Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Wien, New York, Springer-Verlag. |
| Ιατρικοί όροι (MeSH): | Dioscorea*/virology , Dioscorea*/genetics , Plant Diseases*/virology , Caulimoviridae*/genetics , Caulimoviridae*/classification , Caulimoviridae*/isolation & purification , Genome, Viral*, Badnavirus/genetics ; Phylogeny ; Genome, Plant ; Genetic Variation |
| Περίληψη: | Yams (Dioscorea spp.) are an important vegetatively propagated food security crop grown for their starchy tubers. Yams are susceptible to several viruses, and their genomes harbor a diverse array of endogenous pararetroviral sequences (EPRVs), which complicate diagnostics and germplasm exchange because of their similarity to episomal viruses. To better characterize EPRV diversity, we analyzed 86 publicly available whole-genome sequences from five Dioscorea species (D. rotundata, D. alata, D. praehensilis, D. abyssinica, and D. dumetorum). Assembled genomes were screened for endogenous pararetrovirus sequences (EPRVs) using the CAULIFINDER pipeline, targeting conserved RT/RNase H domains of the Caulimoviridae family. Our analyses revealed four major EPRV groups in D. rotundata: Yendovirus, Badnavirus, Yam Endovirus 1, and a Dioscovirus-like lineage. While most insertions were fragmented, we found full-length putative viral genomes corresponding to the Yam Badnavirus and Dioscovirus-like clades. These findings expand knowledge of yam EPRV diversity, contribute to the development of improved diagnostic tools to differentiate endogenous and episomal forms, and promote a science-based, risk-proportionate approach to yam phytosanitation that facilitates global germplasm exchange while maintaining biosecurity. (© 2026. The Author(s).) |
| Competing Interests: | Declarations. Competing interests: The authors declare that there are no conflicts of interest. |
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| Grant Information: | CGIARs Trust Fund donors Genebanks, Plant Health Initiative, and Sustainable Farming Program |
| Entry Date(s): | Date Created: 20260807 Date Completed: 20260807 Latest Revision: 20260923 |
| Update Code: | 20260923 |
| PubMed Central ID: | PMC13451355 |
| DOI: | 10.1007/s00705-026-06703-4 |
| PMID: | 42566103 |
| Βάση Δεδομένων: | MEDLINE |
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