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安徽省太和县瓜类褪绿黄化病毒自然侵染南瓜的检测分析

2021-08-30陈莹韩科雷章东方顾江涛高正良郭志严丹侃王芳

安徽农业科学 2021年16期

陈莹 韩科雷 章东方 顾江涛 高正良 郭志 严丹侃 王芳

摘要 采集安徽省太和县南瓜具有典型症状的病叶样品进行RT-PCR检测鉴定,并结合测序结果确定为CCYV。为了更加明确安徽太和地区CCYV的来源和序列的变异情况,测定了该病毒的外壳蛋白(coat protein,CP)序列进行系统发育分析,结果表明,此次安徽太和县所检测到的分离物与我国其他地区的分离物以及以色列、日本和希腊等国家存在较小的地域差异性,亲缘关系较近,而与伊朗地区的分离物亲缘关系相对较远。该研究是安徽省CCYV侵染南瓜的首次报道,以期为该病害的预警和防控提供理论基础和科学对策。

关键词 南瓜;瓜类褪绿黄化病毒;系统发育分析

中图分类号 S 436.42  文献标识码 A  文章编号 0517-6611(2021)16-0159-03

doi:10.3969/j.issn.0517-6611.2021.16.042   开放科学(资源服务)标识码(OSID):

Detection and Analysis of Cucurbit  Chlorotic Yellow Virus Naturally Infecting Pumpkin in Taihe,Anhui Province

CHEN Ying, HAN Ke-lei, ZHANG Dong-fang et al

(Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031)

Abstract We collected samples of diseased leaves with typical symptoms for RT-PCR detection and identification, and combined the sequencing results to determine that it was CCYV. In order to more clarify the source and sequence variation of CCYV in Taihe, Anhui Province, the coat protein (CP) sequence of the virus was determined for phylogenetic analysis. The results showed that the isolates detected in Taihe, Anhui Province were relatively close to isolates from other areas of China, Israel, Japan, and Greece. The relationship with the isolates in Iran was relatively distant. This study was the first report of CCYV infestation of pumpkins in Anhui Province, in order to provide a theoretical basis and scientific countermeasures for the early warning and prevention of the disease.

Key words Pumpkin;Cucurbit chlorotic yellows virus;Phylogenetic analysis

瓜类褪绿黄化病毒(cucurbit chlorotic yellows virus,CCYV)属于长线形病毒科(Closteroviridae)毛形病毒属( Crinivirus ),由2种类型的烟粉虱(B型和Q型)半持久性传播[1-2],不能够通过摩擦接種传播。CCYV在自然条件下可侵染多种瓜类作物,如西瓜、甜瓜、黄瓜和南瓜等[3-6]。CCYV最早是2004年日本学者在一个甜瓜的温室大棚中发现,但其基因组序列是2010年才被鉴定出来[5]。我国2019年被首次报道(湖南省)CCYV在自然条件下侵染南瓜。虽然该病毒是毛形病毒属近几年新加入的成员,但其危害范围较广,蔓延速度较快,在伊朗[7]、黎巴嫩[8]、希腊[9]和苏丹[10]等国家均有发生危害,此外在我国如上海[11]、台湾[12]、山东[13]、新疆[4]、河南和海南[14]等地也均有报道。CCYV主要危害瓜类作物的叶片,症状表现为花叶、黄化和卷曲等,严重时导致整株坏死,颗粒无收[15]。……

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