Int. J. Biosci.12(6), 275-280, June 2018
Potato is the most important crop packed with nutritional benefits needed for a healthy lifestyle. Among various devastating diseases potato leaf roll virus (PLRV) causes significant decrease in quality and quantity of potato crop. In the current research potato germplasm received from Potato Research Institute (PRI), Sahiwal, Pakistan was sown at Plant Virology Section, Plant Pathology Research Institute, Faisalabad to study the varietal reaction against PLRV. No variety/ advanced line exhibited highly resistant response. Only four varieties/ lines viz.FD 74-38, FD 73-38, FD 78-36 and Rubi showed moderately resistant reaction whereas nine varieties/lines namely FD 76-78, FD 73-110, SL 11-50, FD 76-35, FD 76-67, FD 74-28, FD 76-30, PRI RED and FD 76-72expressed moderately susceptible response. Likewise, twelve potato varieties/ advanced lines such as FD 77-4, FSD WHITE, FSD RED, FD 69-1, FD 76-59, FD 71-1, FD 36-36, SL 10-4, FD 78-51, FD 8-1, FD 74-30 and SL 8-5 proved to be susceptible while four varieties/lines i.e.SL 9-13, FD 74-50, FD 78-15 and FD 76-55exhibitedhighly susceptible response by using disease rating scale. It is concluded that potato varieties/ advanced lines that expressed moderately resistant response might be used for general cultivation by managing all other yield limiting factors such as nutritional deficiency, irrigation, fertilizers, insects and tillage operations etc.
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