Department of Plant Breeding and Genetics, C. S. Azad University of Agriculture and Technology, Kanpur
**Present address: Haryana Agricultural University, Hissar and Narandera Dev University of Agriculture and Technology, Faizabad.
*Part of the thesis submitted by Senior Author for Ph.D. Degree of Kanpur University.
Thirty nine varieties of rice were studied for their phenotypic stabilty in 8 environments consisting of 4 locations each with 2 fertility conditions using Freeman ad Perkins (1971) model. The results indicated presence of significant genotype-environment interactions for all the characters studied. Most of the genotype-environment interactions were attributed to linear component except in case of height and test weight in which both linear and non-linear components were significant. ‘Sona’, ‘Ratna’, ‘Jaya’ and ‘IR 24’ were found to be the most adaptable varieties as they showed high mean, unit regression-coefficient and low deviation from regression. ‘Sona’ was found to be the most ideal variety. The stability in ‘Sona’ was mainly due to its stability for test weight, whereas in ‘Jaya’, ‘IR 8’ and ‘IR 24’ it was primarily a function of ear bearing tillers.
