For SAS users, programs have been developed by Hussein et al. (2000) to assess a large number of stability measures and Kang's index of reliability:
Hussein, M.A., Bjornstad, A. & Aastveit, A.H. 2000. SASG x ESTAB: a SAS program for computing genotype x environment stability statistics. Agron. J., 92: 454-459.
@Gunter Laux. Sir, i have try to make use of this information but its difficult to get the information right. All effort in using the procedure laid down in this paper is not working may be am the one that is making mistake in interpreting the article content