南繁区水稻病毒病发生情况及分子鉴定

Survey and Molecular Identification of Rice Virus Disease in Hainan Winter-Breeding Areas

对海南岛南部三亚、琼海、陵水等南繁水稻产区市县的病毒病发生情况进行调查,同时根据国内外已报道的10种主要水稻病毒设计特异PCR检测引物,对23个疑似水稻病毒样品进行分子检测,结果表明:海南南繁区水稻病毒病主要有2种,即由南方水稻黑条矮缩病毒(southern rice black-streaked dwarf virus,SRBSDV)引起的南方水稻黑条矮缩病和由水稻齿叶矮缩病毒(rice ragged stunt virus,RRSV)引起的水稻齿叶矮缩病;经分子检测鉴定了6例南方水稻黑条矮缩病样品和14例水稻齿叶矮缩病样品,检出2个交叉复合感染的样品,2种病样的检出率分别为26.09%和60.87%,其余8种水稻病毒均未检测到。研究结果表明,南方水稻黑条矮缩病毒和水稻齿叶矮缩病毒是南繁水稻种植区域需重点防治的病害对象。

Circumstance of rice virus disease in southern Hainan island rice-planting areas including Sanya, Qionghai and Lingshui was investigated. Specific primers for 10 known rice virus species were designed for PCR tests. A total of 23 suspected virus-infected samples were tested. Molecular identification results showed that there were two major rice virus species existed in Hainan winter-breeding areas:southern rice black-streaked dwarf virus(SRBSDV) and rice ragged stunt virus(RRSV). 6SRBSDV-infected samples and 14 RRSV-infected samples were identified by PCR and sequencing methods. 2 samples were co-infected by both SRBSDV and RRSV. Infection rates of SRBSDV and RRSV were 26.09% and 60.87%, separately. The other 8 viruses were not detected. This study showed that SRBSDV and RRSV are key diseases in Hainan winter-breeding areas and should be carefully prevented.