POTATO VIRUS Y: AN EVOLVING PATHOGEN OF POTATO WORLDWIDE

khalid Naveed, Amjad Abbas, Luqman Amrao

Abstract


Potato virus Y (PVY) is one of the important diseases of potato throughout the world wherever potatoes are grown. Yield losses in potato due to PVY are upto 70% if infection occurs at initial growth stages of plants. More than eight PVY strains have been reported worldwide which differ from each other based on symptoms they produce in the infected host plants and at their genetic makeup. In recent past years, new necrotic strains of PVY have emerged which are more damaging as they produce necrotic rings and arms on the tubers of infected plants. With increasing aphid population during last decade, incidence of PVY epidemics has increased worldwide. Managing PVY is difficult as some strains do not produce symptoms on infected potato plants and disease diagnosis becomes difficult. In Pakistan, work on strain differentiation of PVY and their aphid vectors are lacking and there is need of molecular research to identify PVY strains which are present in Pakistan.


Keywords


Potato virus Y, necrotic arcs, resistance, strains

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References


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