Abstract
Yellow mosaic disease in grain legumes in Indian subcontinent is caused by two important virus species viz. Mungbean yellow mosaic virus (MYMV) and Mungbean yellow mosaic India virus (MYMIV), belonging to the genus Begomovirus of the family Geminiviridae. The genomic components of a begomovirus causing yellow mosaic disease in blackgram in southern India were cloned and sequenced. Nucleotide sequence comparison of DNA A component shows the virus isolate to be a variant of Mungbean yellow mosaic virus:–(MYMV-[IN:Vam:05]). However, DNA B component of the present virus isolate has greater similarity (92%) to Mungbean yellow mosaic India virus. Agroinoculations of the viral clones produced typical yellow mosaic symptoms in blackgram and mungbean, severe leaf curl and stunting in French bean, similar to blackgram isolate of MYMIV. Blackgram isolates of both the virus species were only mildly infectious on cowpea, produced atypical leaf curl symptoms and not yellow or golden mosaic. In agroinoculations done by exchanging genomic components, symptom expression was seen only in French bean. In cowpea, blackgram and mungbean there was no visible symptoms though viral DNA could be detected by PCR.
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Acknowledgments
The financial support given by Indian Council of Agricultural Research (ICAR network project on transgenic in crops, cotton and soybean). Government of India is gratefully acknowledged. We are thankful to Dr. H.S.Gupta, Director, Indian Agricultural Research Institute, New Delhi and Dr.R.K.Jain, Head, division of Plant Pathology, Indian Agricultural Research Institute, New Delhi-110012, India, for providing necessary facilities. We are also grateful to the scientists and staff at National Phytotron Facility, Indian Agricultural Research Institute, India for their guidance and support to grow plants under controlled conditions.
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Haq, Q.M.I., Rouhibakhsh, A., Ali, A. et al. Infectivity analysis of a blackgram isolate of Mungbean yellow mosaic virus and genetic assortment with MYMIV in selective hosts. Virus Genes 42, 429–439 (2011). https://doi.org/10.1007/s11262-011-0591-y
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DOI: https://doi.org/10.1007/s11262-011-0591-y