Prevalence of R Genes for Resistance to Potato Viruses in Uganda Germplasm

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dc.contributor.authorByarugaba, Arinaitwe Abel
dc.contributor.authorMukasa, Settumba B.
dc.contributor.authorBarekye, Alex
dc.contributor.authorRubaihayo, Patrick R.
dc.date.accessioned2022-08-02T12:28:05Z
dc.date.available2022-08-02T12:28:05Z
dc.date.issued2021
dc.description.abstractThe most important potato viruses in Uganda are Potato virus Y (PVY), Potato leaf roll virus (PLRV), Potato virus X (PVX), Potato virus S (PVS), Potato virus A (PVA) and Potato virus M (PVM). Utilization of R genes in breeding for resistance to viruses has not been explored in Uganda due to limited information on the prevalence of R genes in the available genotypes. This study aimed at identifying potato genotypes with R genes for resistance to potato viruses important in Uganda. The study screened 71 potato accessions from the National Potato Breeding Programme at Kachwekano Zonal Agricultural Research and Development Institute for the presence of resistance genes to viruses using diagnostic molecular markers. The results indicated that 21 out of 71 genotypes had resistance markers, of which nine genotypes, NKRN59.58, Derby, Markies, Sifra, 395017.229, Nakpot 5, 20108.5, Royal and 393220.54, had Ryadg gene for PVY resistance and two genotypes, Kimuri and 319919.3, had Rysto gene for resistance to PVY and PVA. Nine genotypes, 395011.2, Markies, Nakpot 5, 20108.5, Sifra, 20157.6, Royal, 2015.8 and Ambition, had the Nbtbr gene for resistance to PVX. In addition, 14 genotypes, 395011.2, Markies, Nakpot 5, Sarpouna, 393220.54, 391046.14, Sarpomira, 395077.12, Sifra, 20157.6, Royal, Ambition, Kimuri and Caruso, had the Nsadg gene conferring resistance to PVS. Four genotypes, Markies, Sifra, Nakpot 5 and Royal, had the Ryadg, Nbtbr and Nsadg genes for combined resistance to PVY, PVX and PVS. The resistant genotypes could be used as parents to introgress resistance genes into susceptible cultivars.en_US
dc.identifier.citationByarugaba, AA, Mukasa, SB, Barekye, A., & Rubaihayo, PR (2021). Prevalence of R Genes for Resistance to Potato Viruses in Uganda Germplasm. Potato Research , 64 (2), 267-276. https://doi.org/10.1007/s11540-020-09477-7en_US
dc.identifier.urihttps://doi.org/10.1007/s11540-020-09477-7
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/4253
dc.language.isoenen_US
dc.publisherPotato Researchen_US
dc.subjectAllele-specific markersen_US
dc.subjectMolecular markersen_US
dc.subjectPotato virusesen_US
dc.subjectR genesen_US
dc.subjectVirus resistant genotypesen_US
dc.titlePrevalence of R Genes for Resistance to Potato Viruses in Uganda Germplasmen_US
dc.typeArticleen_US
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