Evaluation of stability in sweetpotato using different methods

Archana  Mukherjee,; Sudip  K. Naskar,

Evaluation of stability in sweetpotato using different methods

Abstract:

Naskar S.K. and Mukherjee A. 2001. Evaluation of stability in sweetpotato using different methods. Ann. Trop. Res. 23[1]:11-20. The stability in sweetpotato (Ipomoea batatas L.) was evaluated using the methods of Eberhart and Russel (1966), Shukla (1972) and Francis and Kannenberg (1978). Eight sweetpotato lines along with a check local cultivar were grown for three years in eight environments across Orissa, India. Variances due to genotypes, environments,and genotype x envorinment interaction were highly significant. Both linear and nonlinear components were also significant. The three stability methods differed in identifying stable cultivars. Eberhart and Russel's S'd and Shukla's S parameters were highly correlated (r = 0.78**). Only one genotype (90/606) was found stable under the three methods evaluated. The Francis and Kannenberg technique was most convenient in grouping the cultivars.

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