Central Tobacco Research Institute, Rajahmundry
Phenotypic, genotypic and environmental correlations for different pairs of quantitative characters contributing to yield, in 50 natu tobacco types were presented. In general, the environmental correlation was low and nonsignificant. Flowering time showed consistently negative environmental correlation with plant height, number of leaves, green leaf yield and cured leaf yield, The correlation between flowering time and number of leaves was positive and significant.
Positive, significant correlations were also observed between plant height and number of leaves, plant height and yield and number of leaves and yield.
The correlation between the green leaf and cured leaf was high, nearing unity. It is concluded that green leaf yield deserves to be an index of selection in programmes of production breeding in natu tobacco.
