Studies on the biochemical traits of resistant and susceptible genotypes of cauliflower in relation to downy mildew disease

The present investigation was carried out at the Experimental Farm of the Department of Vegetable Science and Floriculture, CSK HPKV Palampur to gather information on the association between downy mildew resistance and biochemical traits. The experimental material comprising of P1, P2, F1, F2, BC1, BC2 generations of six crosses developed by utilizing the four diverse parents viz., DPCaY-3, Palam Uphar, DPCaY-8 and DPCaY-6 were evaluated in Randomized Block Design along with standard check in three replications during rabi 2015–2016. Data were recorded on total soluble solids (oBrix), vitamin C (mg/100g), total sugars (%) and total phenols (mg/g). Correlation matrix revealed that plant disease index exhibited significant and positive correlation with total sugars, whereas this association was significant and negative with vitamin C and total phenols.