STABILITY FOR SEED SIZE IN BUNCH GROUNDNUT (ARACHIS HYPOGAEA LINN.)

Abstract

Twenty nine bunch groundnut genotypes were evaluated under four environments to estimate the stability parameters for 100 seed weight. Both predictable and non predictable components of genotypes x environment (G x E) interaction were important for expression of this trait. However, .linear portion was significantly higher than nonlinear portion. Seventeen genotypes showed linear and 11 genotypes nonlinear sensitivity. Both the components of G x E interaction were present in gem>type JB-224. The bold seeded genotype EC-100827 and small seeded genotype JB-215 showed wider adaptation. The bold seeded genotype JB-210 and small seeded genotype J-18 were highly responsive and suitable for favourable environments. Bold seeded genotype J-17, GG-2, J(E)-l, JB-223 and CGC-3 as well as small seeded genotypes ICGS-11, J-11, NRGS-4, J(E)-l, JB-187, J(E)-336 and GAUG-1 were suitable for adverse environments.