Abstract
AbstractOver the past decades, two new strains of potato virus Y (PVYN-Wi (Wilga) and PVYNTN) have been the most widely distributed worldwide in potato crops (Solanum tuberosum L.). Effective resistance genes comprehensive against all the known strains of the virus are available in some commercial cultivars. However, not all resistance genes in cultivars have been challenged by the new PVY strains to confirm effectiveness of the resistances available. This study was set to identify PVY resistant genotypes and estimate yield losses in potato cultivars in Kenya. PVYN-Wi was used for PVY resistance screening because it was the most prevalent strain in Kenya and also was found to produce more severe infection in Kenyan potato genotypes compared with PVYO (the second most prevalent strain). Three cultivars, Kenya Karibu, Sherekea and Unica, were identified as resistant because they did not get PVY infections over three seasons of both greenhouse and field screening experiments. In addition, two early generation breeding clones were identified as resistant at 28 days post-inoculation. In susceptible cultivars Dutch Robyjn, Nyayo and Kenya Mpya, PVYN-Wi infection caused yield losses of 21.6, 39.0 and 53.1%, respectively, after three seasons. This study demonstrated the necessity to screen for PVY resistance based on the most prevalent PVY strains and to make an informed decision on the usefulness of current levels of resistance in potato cultivars.
Publisher
Springer Science and Business Media LLC
Subject
Agronomy and Crop Science,Food Science
Reference43 articles.
1. Adams MJ, Zerbini FM, French R, Rabenstein F, Stenger DC, Valkonen JPT (2012) Family Potyviridae. In: King A, Adams M, Carstens E, Lefkowitz E (eds) In virus taxonomy. Ninth report of the international committee on taxonomy of viruses. Elsevier, Oxford, pp 1069–1089
2. Beemster ABR (1976) Translocation of the potato viruses YN and YO in some potato varieties. Potato Res 19:169–172. https://doi.org/10.1007/BF02360420
3. Birch PR, Bryan GJ, Fenton B, Gilroy EM, Hein I, Jones JT, Prashar A, Taylor MA, Torrance L, Toth IK (2012) Crops that feed the world 8: potato: are the trends of increased global production sustainable? Food Sec 4:477–508. https://doi.org/10.1007/s12571-012-0220-1
4. Bock RK, Robertson DG (1976) Notes on east African plant viruses 9: potato virus Y. E Afr Agric For J 41(4):340–343. https://doi.org/10.1080/00128325.1976.11662819
5. Chandla VK, Shiv K, Sighn MN, Verma KD, Paul Khurana SM (2001) Role of aphids in degeneration of seed stocks in the higher hills. Ind Pot Ass 28(1):117–118
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献