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  • Title: First Report of Faba bean necrotic yellows virus Affecting Legume Crops in Azerbaijan.
    Author: Kumari SG, Attar N, Mustafayev E, Akparov Z.
    Journal: Plant Dis; 2009 Nov; 93(11):1220. PubMed ID: 30754600.
    Abstract:
    A total of 482 chickpea (Cicer arietinum L.), 182 lentil (Lens culinaris Medik.), 12 vetch (Vicia sativa L.), 5 field pea (Pisum sativum L.), and 3 faba bean (Vicia faba L.) samples were collected from plants with symptoms suggestive of a viral infection (leaf rolling, yellowing, and stunting) from the major legume-production areas of Azerbaijan in the 2007 and 2008 growing seasons. All samples were tested by the tissue-blot immunoassay (3) at the Virology Laboratory of ICARDA, Syria using 11 specific legume virus antisera including a monoclonal antibody (2-5H9) (1) for Faba bean necrotic yellows virus (FBNYV). Laboratory tests showed that FBNYV was detected in 73, 61, 11, 3, and 2 samples of chickpea, lentil, vetch, field pea, and faba bean, respectively. Total DNA was extracted from six FBNYV-positive samples (two chickpea, two lentil, and two vetch) and tested by PCR with the following four primer sets (FBNYV, Milk vetch dwarf virus [MDV], Subterranean clover stunt virus [SCSV], and nanovirus DNA-R primers [F103 and R101]) (2). All six Azeri samples as well as the reference nanovirus isolates (SCSV-Australia, MDV-Japan, and FBNYV-Syria) generated amplicons of the expected size (~770 bp) using the nanovirus DNA-R primers (F103 & R101). In addition, Azeri samples and FBNYV-Syria yielded a PCR amplicon of the expected size (666 bp) with the FBNYV primer pair. The MDV- and SCSV-specific primers did not generate amplicons with these six samples. Sequence analysis of the FBNYV amplicons from two isolates (AzL 282-07 from lentil [GenBank Accession No. GQ351600] and AzV 277-07 from vetch [GenBank Accession No. GQ371215]) showed that they were 99% identical with each other. Comparing the sequence of AzL 282-07 with that of other nanoviruses revealed identities of 97% (FBNYV-Spain; DQ830990), 96% (FBNYV-Iran; AM493900), 92% (FBNYV-Syria; Y11408), 92% (FBNYV-Egypt; AJ132183), 78% (MDV; AB044387) and 69% (SCSV-Australia; U16734). FBNYV has been reported to infect food legumes in many countries in West Asia and North Africa and cause economic losses on faba bean in Egypt, Jordan, and Syria. To our knowledge, this is the first record of FBNYV infecting legume crops in Azerbaijan. References: (1) A. Franz et al. Ann. Appl. Biol. 128:255, 1996. (2) S. G. Kumari et al. Phytopathol. Mediterr. 47:42, 2008. (3) K. M. Makkouk and A. Comeau. Eur. J. Plant Pathol. 100:71, 1994.
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