Yield data for 12 years was analyzed from a 25 year old polyclonal Hevea brasiliensis population consisting of 284 seedling trees in experiment 1. Based on yield profile, trees were categorized into 10 groups and latex [ATP] was analyzed over two years and its correlation with yield was estimated. High yielding groups showed high yield in all seasons and all the years compared to low yielders. It was observed that mean yield over 12 years was positively correlated with girth (r=0.55**) and crop efficiency (yield per cm of tapping cut) (r=0.85**). Latex ATP concentration had significant positive correlation with mean seasonal yield and annual yield in the two years in which ATP estimation was done, as well as with the mean yield over twelve years. In the second experiment which was a replicated trial consisting of eleven ortets (selected from experiment 1), latex ATP concentration was positively correlated with the yield of the genotypes, though not significant, possibly due to low coefficient of variation in the selected population. Latex ATP concentration had significant positive correlation with crop efficiency of polyclonal population (r=0.76**) and selected genotypes (r=0.61*). ATP concentration in latex is an indicator of high yield potential of rubber trees and can be utilized as a marker for selection of high yielders in the north-eastern region of India.