Link to home

Resistance to Monopartite Begomoviruses Associated with the Bean Leaf Crumple Disease in Phaseolus vulgaris Controlled by a Single Dominant Gene

July 2005 , Volume 95 , Number  7
Pages  819 - 826

Francisco Monci , Susana García-Andrés , José Antonio Maldonado , and Enrique Moriones

First, second, and fourth authors: Estación Experimental “La Mayora,” Consejo Superior de Investigaciones Científicas, 29750 Algarrobo-Costa, Málaga, Spain; and third author: Seminis Vegetable Seeds Iberica, Almería, Spain

Go to article:
Accepted for publication 23 February 2005.

Tomato yellow leaf curl virus (TYLCV) and Tomato yellow leaf curl Málaga virus are monopartite begomoviruses (genus Begomovirus, family Geminiviridae) that infect common bean (Phaseolus vulgaris), causing bean leaf crumple disease (BLCD). This disease was found to be widespread in southern Spain and causes stunted growth, flower abortion, and leaf and pod deformation in common bean plants. Commercial yield losses of up to 100% occur. In the present study, we have identified and characterized a resistance trait to BLCD-associated viruses in the common bean breeding line GG12. This resistance resulted in a complete absence of BLCD symptoms under field conditions or after experimental inoculation. Our analysis showed that virus replication was not inhibited. However, a severe restriction to systemic virus accumulation occurred in resistant plants, suggesting that cell-to-cell or long-distance movement were impaired. In addition, recovery from virus infection was observed in resistant plants. The reaction of P. vulgaris lines GG12 (resistant) and GG14 (susceptible), and of F1, F2, and backcross populations derived from them, to TYLCV inoculation suggested that a single dominant gene conferred the BLCD resistance described here.

© 2005 The American Phytopathological Society