Bean Common Mosaic Virus Strains Associated with Bean Mosaic Epidemics in the Northwestern United States

Plant Disease ◽  
1983 ◽  
Vol 67 (6) ◽  
pp. 658 ◽  
Author(s):  
R. O. Hampton
Author(s):  
M.S. Iqbal ◽  
S.A. Hussain ◽  
N. Arshad ◽  
S. Munir ◽  
M.A. Ali ◽  
...  

Background: Cowpea is a major food legume rich in protein but its production has been dwindling by several factors including viral infection due to various virus strains in all agro-ecological zones.Methods: Sixty eight cowpea genotypes were screened against qualitative traits (leaf shape, seed surface, twinning tendency, anthocynin pigment, plant type, fodder type and cream color) and four seed borne viruses viz. cucumber mosaic virus (CMV), cowpea aphid borne mosaic virus (CABMV), black eye cowpea mosaic virus (BlCMV) and bean common mosaic virus (BCMV) under both in situ and laboratory conditions using DAC-ELISA.Result: Based on in situ screening, 16 genotypes were found resistant to all the four viruses, whereas for ELISA, 13 genotypes (27005, 27041, 27075, 27141, 27145, 27146, 27147, 27158, 27160, 27167, 27172, IT85F-1380 and IT86D-719) were found resistant to all. Twelve clusters were obtained from UPGMA based on disease severity. Genotype 27008 (Pakistan) was present in cluster VI and was susceptible to all antisera CMV, CABMV, BICMV and BCMV. Whereas 13 genotypes were present in cluster VIII which were found resistant to all the four antisera applied. Therefore, 13 genotypes suggested for safe use in any breeding program at developing resistant cultivars. First two factors obtained through PCA with eigen-values greater than 1 contributed greater than 80 per cent variability. Twelve distinct groups were observed and these were in coordination with cluster analysis.


1980 ◽  
Vol 95 (3) ◽  
pp. 619-630 ◽  
Author(s):  
N. L. Innes ◽  
D. G. A. Walkey

SUMMARYA high level of resistance to the bean common mosaic virus strains NL3 and NL4 when inoculated separately or together was confirmed in the cultivars Turkish Brown, Valja and 1750–73. Following crosses between the susceptible cv. The Prince and all three resistant cultivars, inoculation of F2 and F3 populations revealed that the cvs Turkish Brown and Valja each differed from The Prince in being homozygous for a major recessive gene conferring resistance to both NL3 and NL4. Homology tests indicated that the same gene was present in both Turkish Brown and Valja. Polygenes in Turkish Brown and Valja also appeared to confer some resistance to NL3, or environmental variation led to continuous distribution patterns in the F2's of resistant parents crossed with The Prince. Although a major recessive gene controlled resistance to NL3 in cv. 1750–73, it differed from that in the two other resistant cultivars. In addition, cv. 1750–73 carried a dominant gene determining reaction to the virus; probably the I gene originally found in Corbett Refugee. An attempt is made to relate these results to Drijfhout's (1978) gene-for-gene model. Using Drijfhout's gene nomenclature all the cultivars tested appear to carry the strain nonspecific gene bc-u. Further genetical tests will be necessary to determine with certainty which, if any, of Drijfhout's strain-specific resistant bc-genes are present in the three resistant cultivars studied here.


Plant Disease ◽  
2010 ◽  
Vol 94 (4) ◽  
pp. 478-478 ◽  
Author(s):  
T. A. Damayanti ◽  
O. J. Alabi ◽  
A. Rauf ◽  
R. A. Naidu

Yardlong bean (Vigna unguiculata subsp. sesquipedalis) is extensively cultivated in Indonesia for consumption as a green vegetable. During the 2008 season, a severe outbreak of a virus-like disease occurred in yardlong beans grown in farmers' fields in Bogor, Bekasi, Subang, Indramayu, and Cirebon of West Java, Tanggerang of Banten, and Pekalongan and Muntilan of Central Java. Leaves of infected plants showed severe mosaic to bright yellow mosaic and vein-clearing symptoms, and pods were deformed and also showed mosaic symptoms on the surface. In cv. 777, vein-clearing was observed, resulting in a netting pattern on symptomatic leaves followed by death of the plants as the season advanced. Disease incidence in the Bogor region was approximately 80%, resulting in 100% yield loss. Symptomatic leaf samples from five representative plants tested positive in antigen-coated plate-ELISA with potyvirus group-specific antibodies (AS-573/1; DSMZ, German Resource Center for Biological Material, Braunschweig, Germany) and antibodies to Cucumber mosaic virus (CMV; AS-0929). To confirm these results, viral nucleic acids eluted from FTA classic cards (FTA Classic Card, Whatman International Ltd., Maidstone, UK) were subjected to reverse transcription (RT)-PCR using potyvirus degenerate primers (CIFor: 5′-GGIVVIGTIGGIWSIGGIAARTCIAC-3′ and CIRev: 5′-ACICCRTTYTCDATDATRTTIGTIGC-3′) (3) and degenerate primers (CMV-1F: 5′-ACCGCGGGTCTTATTATGGT-3′ and CMV-1R: 5′ ACGGATTCAAACTGGGAGCA-3′) specific for CMV subgroup I (1). A single DNA product of approximately 683 base pairs (bp) with the potyvirus-specific primers and a 382-bp fragment with the CMV-specific primers were amplified from ELISA-positive samples. These results indicated the presence of a potyvirus and CMV as mixed infections in all five samples. The amplified fragments specific to potyvirus (four samples) and CMV (three samples) were cloned separately into pCR2.1 (Invitrogen Corp., Carlsbad, CA). Two independent clones per amplicon were sequenced from both orientations. Pairwise comparison of these sequences showed 93 to 100% identity among the cloned amplicons produced using the potyvirus-specific primers (GenBank Accessions Nos. FJ653916, FJ653917, FJ653918, FJ653919, FJ653920, FJ653921, FJ653922, FJ653923, FJ653924, FJ653925, and FJ653926) and 92 to 97% with a corresponding nucleotide sequence of Bean common mosaic virus (BCMV) from Taiwan (No. AY575773) and 88 to 90% with BCMV sequences from China (No. AJ312438) and the United States (No. AY863025). The sequence analysis indicated that BCMV isolates from yardlong bean are more closely related to an isolate from Taiwan than with isolates from China and the United States. The CMV isolates (GenBank No. FJ687054) each were 100% identical and 96% identical with corresponding sequences of CMV subgroup I isolates from Thailand (No. AJ810264) and Malaysia (No. DQ195082). Both BCMV and CMV have been documented in soybean, mungbean, and peanut in East Java of Indonesia (2). Previously, BCMV, but not CMV, was documented on yardlong beans in Guam (4). To our knowledge, this study represents the first confirmed report of CMV in yardlong bean in Indonesia and is further evidence that BCMV is becoming established in Indonesia. References: (1) J. Aramburu et al. J. Phytopathol. 155:513, 2007. (2) S. K. Green et al. Plant Dis. 72:994, 1988. (3) C. Ha et al. Arch. Virol. 153:25, 2008. (4) G. C. Wall et al. Micronesica 29:101, 1996.


2011 ◽  
Vol 22 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Prachi Sharma ◽  
P. N. Sharma ◽  
Renu Kapil ◽  
S. K. Sharma ◽  
O. P. Sharma

2008 ◽  
Vol 9 (1) ◽  
pp. 42 ◽  
Author(s):  
Rayapati A. Naidu ◽  
Gandhi Karthikeyan

The ornamental Chinese wisteria (Wisteria sinensis) is a woody perennial grown for its flowering habit in home gardens and landscape settings. In this brief, the occurrence of Wisteria vein mosaic virus (WVMV) was reported for the first time in Chinese wisteria in the United States of America. Accepted for publication 18 June 2008. Published 18 August 2008.


1991 ◽  
Vol 133 (1) ◽  
pp. 49-56 ◽  
Author(s):  
R. A. Naidu ◽  
P. Sreenivasulu ◽  
S. K. Manohar ◽  
K. N. Ramakrishna ◽  
D. V. R. Reddy ◽  
...  
Keyword(s):  

Plant Disease ◽  
2004 ◽  
Vol 88 (2) ◽  
pp. 119-124 ◽  
Author(s):  
M. Grisoni ◽  
F. Davidson ◽  
C. Hyrondelle ◽  
K. Farreyrol ◽  
M. L. Caruana ◽  
...  

A survey was carried out to identify the viruses infecting vanilla in French Polynesia and to assess their incidence. Virus identification was based on enzyme-linked immunosorbent assay (ELISA) and, for potyviruses, on the sequence of part of the coat protein and inoculation assays. Between 1998 and 1999, 3,610 vanilla plants from 49 plots in the Society Islands were indexed. Cymbidium mosaic virus (CymMV) was detected in 500 vines from 10 plots in the Leeward Islands. The data suggest that this virus has spread widely since its first detection in French Polynesia in 1986, most likely through the dissemination of symptomless infected cuttings. Viruses belonging to the Potyvirus genus were found in 674 plants from 27 plots in the four islands surveyed. Three distinct potyviruses have been identified: (i) Vanilla mosaic virus, (ii) Watermelon mosaic virus, and (iii) and a virus related to Bean common mosaic virus. The symptoms induced on Vanilla tahitensis by the three potyviruses can be differentiated from each other and from those due to CymMV. A significant proportion of the plants surveyed (97/476) were symptomatic but tested negative by ELISA for CymMV and the Potyvirus group. Odontoglossum ringspot virus was not detected in any sample tested.


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