ABSTRACT.
DETERMINATION OF HIPERSENSIBILITY TO BEAN COMMON MOSAIC IN DETACHED LEAVES OF BEANS AND GENETIC FACTORS CONDITIONING ITS INHERITANCE

Mario Alvarez A.1
 

Detached F1, F2 and RC1, primary leaves of bean plants obtained from crosses between the Chilean susceptible varieties Cristal Bayo, Cristal Blanco, Coscorrom and Tortola with foreing resistant varieties as U.S. 5 Refugee, Topcrop, Idaho Refugee and Wisconsin Refugee were mechanically inoculated with bean common mosaic virus (BCMV) and placed in a moist chamber under constant light and a temperature of 29-32ºC. As control, detached leaves of the eight parental varieties were inoculated. Symptoms were recorded three and seven days after the inoculation. Resistant controls reacted with veinal necrosis. Hybrid plants with leaves reacting with veinal necrosis upon inoculations were considered genetically similar to these varieties in relation to their resistance to BCMV. Inoculated leaves of the Chilean varieties remained normal. Thus, those plants that did not react with veinal necrosis were considered susceptible.

Keywords:
1Ing. Agr., Ph. D., Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA), Casilla 5427, Santiago, Chile.