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Fine-mapping and evolutionary history of R-BPMV, a dominant resistance gene to Bean pod mottle virus in Phaseolus vulgaris L.

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Abstract

Key message

R-BPMV is located within a recently expanded TNL cluster in the Phaseolus genus with suppressed recombination and known for resistance to multiple pathogens including potyviruses controlled by the I gene.

Abstract

Bean pod mottle virus (BPMV) is a comovirus that infects common bean and legumes in general. BPMV is distributed throughout the world and is a major threat on soybean, a closely related species of common bean. In common bean, BAT93 was reported to carry the R-BPMV resistance gene conferring resistance to BPMV and linked with the I resistance gene. To fine map R-BPMV, 182 recombinant inbred lines (RILs) derived from the cross BAT93 × JaloEEP558 were genotyped with polymerase chain reaction (PCR)-based markers developed using genome assemblies from G19833 and BAT93, as well as BAT93 BAC clone sequences. Analysis of RILs carrying key recombination events positioned R-BPMV to a target region containing at least 16 TIR-NB-LRR (TNL) sequences in BAT93. Because the I cluster presents a suppression of recombination and a large number of repeated sequences, none of the 16 TNLs could be excluded as R-BPMV candidate gene. The evolutionary history of the TNLs for the I cluster were reconstructed using microsynteny and phylogenetic analyses within the legume family. A single I TNL was present in Medicago truncatula and lost in soybean, mirroring the absence of complete BPMV resistance in soybean. Amplification of TNLs in the I cluster predates the divergence of the Phaseolus species, in agreement with the emergence of R-BPMV before the separation of the common bean wild centers of diversity. This analysis provides PCR-based markers useful in marker-assisted selection (MAS) and laid the foundation for cloning of R-BPMV resistance gene in order to transfer the resistance into soybean.

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Data availability

Phenotype data generated or analyzed during this study are included in this published article (and its supplementary files). Genotypic data are available from the corresponding author on reasonable request.

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Acknowledgements

We are grateful to Mireille Sévignac and Manon Richard for DNA isolation and RILs genotyping and Sophie Blanchet for her contribution to virus disease scoring. We thank Hélène Bergès and Arnaud Bellec at CNRGV (Toulouse, France) for their help with the BAC library construction. CM was supported by fellowships from the French Research Ministry. JCAD was supported by a fellowship from the Colombian Institute of Education support ICETEX.

Funding

This work was supported by INRAe and IDEEV fundings and ANR-22-CE20-0022. IPS2 benefits from the support of Saclay Plant Sciences-SPS (ANR-17-EUR-0007).

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Authors

Contributions

CM, YCAD and VT developed molecular markers and performed bioinformatic analysis. CM and SP conducted virus resistance evaluation and genetic analysis and were actively involved in the writing of the manuscript. WM constructed and screened the BAC library. AGW, YCAD, SP, ASG and PNM participated in the data analysis, discussion and revised the manuscript. VG designed and supervised the research, discussed the results, coordinated the group work with the help of SP and wrote the manuscript. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Valérie Geffroy.

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

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On behalf of all authors, the corresponding author states that the experiments comply with the current laws of the country in which they were performed.

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Communicated by Matthew N. Nelson.

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Meziadi, C., Alvarez-Diaz, JC., Thareau, V. et al. Fine-mapping and evolutionary history of R-BPMV, a dominant resistance gene to Bean pod mottle virus in Phaseolus vulgaris L.. Theor Appl Genet 137, 8 (2024). https://doi.org/10.1007/s00122-023-04513-9

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  • DOI: https://doi.org/10.1007/s00122-023-04513-9

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