Decrease in the dissemination of Bean Common Mosaic Virus (BCMV) in bean genotypes with quantitative resistance

• Published in: Indian phytopathology 2020-12, Vol.73 (4), p.805-811
• Main Authors: Andrade-Hoyos, Petra, López-Valdez, Luis Germán, García-Espinosa, Roberto, Barrales-Cureño, Hebert Jair
• Format: Article
• Language: English
• Subjects: Biomedical and Life Sciences; Life Sciences; Plant Pathology; Short Communication
• ISSN: 0367-973X; 2248-9800
• DOI: 10.1007/s42360-020-00225-y

The reduction in the spread of bean common mosaic virus under field conditions is usually an indicator of the degree of progress in the accumulation of quantitative resistance. In the present work, we present the capacity to reduce field dissemination. Bean genotypes of advanced breeding cycles (C4, C5, C6 and C7) with genotypes of zero cycle (C0) and commercial varieties were compared. Each experimental unit consisted of four furrows, whose plants of two rows were inoculated with the virus, and the plants of the other two furrows were left without inoculation. Despite the high incidence when inoculated, the yields in some advanced cycle genotypes were high, compared to certain C0 genotypes. Assessing the ability to stop the spread of the disease under field conditions and to appreciate its effect on yield is not common in breeding work, however, it is a necessary element to track and evaluate the progress of the breeding process. There were differences in the incidence of advanced cycle genotypes when there was a decrease in the incidence of BCMV due to the natural inoculation and dissemination of the virus (without inoculation) with respect to the original parent populations, which generally showed greater damage, both inoculated and of natural dissemination.