A field experiment was conducted during rabi 1990-91 at Dharwad to study the genetic variability in 52 advanced generation true breeding lines and two check varieties for photosynthesis traits and yield. Chlorophyll content at 60 and 75 DAS and leaf area parameters showed large amount of variation. Gcnotypic and phenotypic coefficients of variation as well as hcritability were also high for them. Total dry matter at 60 and 75 DAS showed low to moderate hcritability. Genetic advance over mean was high for chlorophyll content and leaf area parameter