Resumo

ANAYA-LOPEZ, José Luis et al. Challenges and opportunities in assisted selection of beans resistant toBCMV and BCMNV in Mexico: I. Scale of the Problem. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.3, pp.453-465. ISSN 2007-0934.

The bean diseases known as common mosaic and black root, caused by bean common mosaic virus (BCMV) and bean common mosaic necrosis virus (BCMNV) have increased incidence in Mexico. The BCMV is widely distributed in almost all production regions, and BCMNV preferably in tropical regions. Both viruses cause similar symptoms and can be transmitted by aphids or seed from infected plants, so that its incidence is related to the cultivation of susceptible varieties and climatic conditions that favor the presence of vectors. Control of BCMV and BCMNV can be achieved through certification programs of disease-free seed and use of resistant varieties. The cheapest way to prevent damage is to plant varieties with durable resistance obtained by gene pyramiding, in which a broad-spectrum of resistance is combined against BCMV and BCMNV. This breeding process can be facilitated using molecular marker assisted selection in combination with direct confrontation of the virus. The objective is to elucidate the issues surrounding the impact of BCMV and BCMNV in major producing areas of bean to identify challenges and opportunities in assisted selection of beans resistant to BCMV and BCMNV.

Palavras-chave : BCMV; BCMNV; MAS; molecular markers; resistant varieties.

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