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Papaya (Carica papaya L.) is one of favorite fruits for Indonesian people and known as a good vitamin source. Recently, a ring spot disease was reported in some growing areas and it potentially caused yield loss. The disease is caused by Papaya ringspot virus (PRSV) and considered as a new disease in Indonesia. Therefore, preliminary research was done to study the response of some varieties of papaya against PRSV infection. Field isolates of PRSV were collected from Medan, Aceh, and Bogor. Identification of the isolates was done based on the nucleotide sequence analysis of coat protein gene. Response of papaya varieties was evaluated based on the results of mechanical inoculation. Identification results showed that the nucleotide sequences of PRSV isolates Medan, Aceh, and Bogor, have a high similarity to that from other countries, i.e. Thailand, Australia, China, Japan, Vietnam, and Taiwan (93.0–98.3%). Disease incidence reached 100% for all isolates of PRSV on all test varieties, although based on the DIBA’s result, it was known that the virus titer in plants are different. No varieties of papaya showed resistant to PRSV.

Deteksi dan Respons Lima Varietas Pepaya terhadap Tiga Isolat Papaya Ringspot Virus (PRSV)