A clonal nursery evaluaiton was conducted with seven superior ortets selected from a population of 340 seedling trees grown under the agro climatic conditions of Assam in order to evaluate their performance when clones in comparison to the performance of the original mother tree and a popular check clone. Girth at 5th year of planting and girth increment of the ortet clones, RRSG 9 and RRSG 4 in nursery trial and the corresponding mother trees were significantly higher than that of the check clone RRIM 600.Mean juvenile yield of RRSG 9 with or without stimulation using 2.5 per cent ethephon and the mean yield over 11 years of tapping (mature yield) of the mother tree were significantly higher than that of the check clone. Mean juvenile yield of RRSG 8 without ethephon in nursery trial was significantly higher than RRIM 600 but it was not so in case of mother tree. Juvenile yield of RRSG 8 with 2.5 per cent ethephon was at par with the check clone in the clonal nursery. The performance of RRSG 1 was also noticeable with good pre-monsoon yield. The ortets in the present study maintained the character of their mother tree under bud-grafted condition also, as evidenced by the positive correlation between yield of mother trees and their ortet clones. Clones RRSG 9 and RRSG 8 along with RRSG 1 proved promising for further evaluation in large scale trial.