Department of Horticulture, Punjab Agricultural University, Ludhiana
Studies on the inheritance of blossom-end rot were conducted in the year 1970–72 at the Vegetable Research Station, Punjab Agricultural University, Ludhiana. Six generations, P1 P2, F1, F2, B1 and B2 of the three crosses formed the experimental material for this study. In all the crosses, resistance to blossom-end rot behaved as a monogenic recessive character. The gene for susceptibility has been designated ‘S’ and that for resistance ‘s’. The disease was found to develop best at 32.4°C to 28.2°C and 85.5 to 60.5 per cent relative humidity under field conditions. There was no effect of sun-rays or chemicals on the incidence of this disease.
