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Title: PRESENCE OF BEAN COMMON MOSAIC NECROTIC VIRUS IN THE DOMINICAN REPUBLIC: A NEW CHALLENGE FOR DRY BEAN BREEDERS AND GROWERS IN THE CARIBBEAN REGION

Author
item GODOY-LUTZ, G - IDIAF, DOMINICAN REPUBLIC
item SEGURA, Y - IDIAF, DOMINICAN REPUBLIC
item STEADMAN, J - UNIV NEBRASKA, LINCOLN
item Miklas, Phillip - Phil

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Abstract Only
Publication Acceptance Date: 2/1/2004
Publication Date: 4/1/2004
Citation: Godoy-Lutz, G., Segura, Y., Steadman, J.R., Miklas, P.N. 2004. Presence of bean common mosaic necrotic virus in the dominican republic: a new challenge for dry bean breeders and growers in the caribbean region. Proceedings of the Bean Improvement Cooperative, Oct 27-29, Sacramento, CA, 2003. In Annual Report Bean Improvement Cooperative 47:119-120.

Interpretive Summary:

Technical Abstract: Bean Common Mosaic (BCM) is a serious and widespread disease of common bean (Phaseolus vulgaris L.). The BCM virus infects mainly Phaseolus spp. and P. vulgaris is the primary host. The virus speads via seed, pollen and numerous aphid species. Bean common mosaic necrosis virus (BCMNV) is a new species with three strains (NL-3, -5, and -8) and is separate from bean common mosaic virus. BCMNV causes "black root" symptoms on bean with the I gene and mosaic symptoms on non-I gene varieties. Black root symptoms were observed on black seeded varieties such as Arroyo Loro Negro in 1999 in the San Juan Valley of the Dominican Republic. The objectives of this study were to determine the source of BCM/BCMNV infection and to determine strain of the virus. Foundation seed from farmer fields was mixed with off types that developed mosaic symptoms along with commercial varieties with the I gene that developed "black root". The contamination of foundation seed is the likely source of the increased incidence of the virus. All the red mottled varieties grown in the San Juan Valley are susceptible. Thus, the introduction of the protected I gene (I gene with bc-3 or bc-12) into new red mottled and black seeded varieties is a priority for the Dominican Republic as well as Haiti, where BCMNV is also found.