METHOD FOR PREDICTING SYMPTOM APPEARANCE RATE AND SEVERITY OF SWEET POTATO VIRAL DISEASE IN NURSERY STAGE

摘要

Provided is a method for predicting the symptom appearance rate and severity of a sweet potato viral disease in the nursery stage. The method comprises the following steps: randomly selecting sweet potato seed samples before breeding sweet potatoes; extracting the total DNA and total RNA of the sweet potato seed samples, and detecting the situation of viruses carried by the sweet potato seeds by respectively using PCR and RT-PCR methods; and predicting the symptom appearance rate and severity of a sweet potato viral disease in the nursery stage according to the type of viruses carried by the sweet potato seeds and the virus carrying rate of the sweet potato seeds.