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首页> 美国卫生研究院文献>Indian Journal of Virology >Survey symptomatology transmission host range and characterization of begomovirus associated with yellow mosaic disease of ridge gourd in southern India
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Survey symptomatology transmission host range and characterization of begomovirus associated with yellow mosaic disease of ridge gourd in southern India

机译：与印度南部丝黄色花叶病相关的Begomovirus的调查症状传播寄主范围和特征

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Ridge gourd is an important vegetable crop and is affected by several biotic and abiotic factors. Among the different biotic factors, ridge gourd yellow mosaic disease (RgYMD) is new emerging threat for the production of ridge gourd. The incidence of the RgYMD varied from 30 to 100% in southern India with highest disease incidence of 100% observed in Belagavi district of Karnataka state. The infected plants showed chlorosis, mosaic, cupping of leaves, blistering, reduction in leaf size and stunted growth. The varieties/hybrids grown in the farmer’s fields were found to be susceptible to the disease. Begomovirus was detected in 61 out 64 samples collected from different areas of southern India. Further, all the samples failed to give amplification for beta and alpha satellites. The transmission studies revealed that single whitefly (Bemisia tabaci) is enough to transmit the virus, however, 100% transmission was observed with 10 whiteflies. The minimum acquisition access period and inoculation access period for transmission of virus by whitefly was 15 min. Among the 56 host plants belonging to diversified families tested for host range, sponge gourd, ash gourd, bottle gourd, pumpkin, cucumber, summer squash, cluster bean, tobacco and datura were shown to be susceptible. Seventy six varieties/hybrids evaluated for identifying the resistance source for RgYMD, all were found highly susceptible. Sequence analysis of DNA-A revealed that the causal virus shared highest nucleotide sequence identity (92.3%) with Tomato leaf curl New Delhi virus (ToLCNDV) infecting sponge gourd from northern India. Sequence and phylogenetic analysis of both DNA-A and DNA-B components showed that the begomovirus associated with RgYMD is found to be strain of ToLCNDV. This is first report of ToLCNDV association with RgYMD from southern India. Electronic supplementary materialThe online version of this article (doi:10.1007/s13337-017-0376-6) contains supplementary material, which is available to authorized users.
机译：葫芦是一种重要的蔬菜作物，受几种生物和非生物因素的影响。在不同的生物因素中，葫芦黄花叶病（RgYMD）是生产葫芦的新威胁。在印度南部，RgYMD的发病率从30％到100％不等，在卡纳塔克邦的Belagavi区观察到的最高疾病发病率是100％。受感染的植物表现出萎黄病，花叶病，叶片拔罐，起泡，叶片尺寸减小和生长受阻。人们发现，农民田间种植的品种/杂种易患该病。在印度南部不同地区收集的64个样本中，有61个检测到了乙状病毒。此外，所有样本都未能对β和α卫星进行放大。传播研究表明，单个粉虱（Bemisia tabaci）足以传播该病毒，但是，在10个粉虱中观察到100％的传播。粉虱传播病毒的最小获取访问时间和接种访问时间为15分钟。在属于不同寄主范围的56个寄主植物的寄主范围中，海绵葫芦，烟灰葫芦，葫芦，南瓜，黄瓜，西葫芦，cluster豆，烟草和曼陀罗很容易受到感染。评价发现有76个变种/杂种对RgYMD的抗性来源进行了鉴定，所有这些变种/杂种均极易感。 DNA-A的序列分析表明，该致病病毒与感染印度北部海绵葫芦的番茄卷叶新德里病毒（ToLCNDV）具有最高的核苷酸序列同一性（92.3％）。对DNA-A和DNA-B成分的序列和系统发育分析表明，与RgYMD相关的传基因病毒被发现是ToLCNDV的毒株。这是ToLCNDV与印度南部RgYMD协会的首次报告。电子补充材料本文的在线版本（doi：10.1007 / s13337-017-0376-6）包含补充材料，授权用户可以使用。

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