Stability statistics of some faba bean genotypes [electronic resource].

Includes reference.

To develop high yielding varieties with improved level ofresistanee to biotic and a biotic stresses under different agroclimalic conditions (North Della, Middle and Upper Egypt) and to develop cultivars which can be adapted to a wide range of diverse environment, this study aimed to evaluate andexplore the reliability of some stability statistics methods namely: phenotypic stability of Eberhart and Russell (1966), genotypic stability of Tai (1971), stability variance of Shukla (1972) and Wricke (1%2) and yield stability statistic ofKang andMagari (199S). Three gronps offaba bean genetic resources were used in the study: Group I (North Delta): Six genotypes were planted at three locations (Nubaria, Etaai El-Barood and Tag Elez Research Stations); group II (South Delta and Middle Egypt): Five genotypes were sown at three sites (Seds, Sers El-Liaan and El-Gemmiza Research Stations) and group III (Upper Egypt): Six genetic resources were grown at two locations (El-Matana and Kom Ombo Research Stations). At each location, the experiment was condncted during the three successive seasons of 2003104, 2004IOS and 200SI06 in randomized complete block design with four replications. Group I (North Delta), genotypes: 1556/914/2001, 943/1151/93 and 1426/711/2000 exhibited phenotypic stability (Eberhart and. Rnssell method). Genotypic stability (Tal's method) results showed that genotypeslSS6191412001 and 1426f71112000 exhibited an above and below average degrees of stability, respectively. Concerning stability-variance of Shukla, the genotypes 119S/901199, 1233/848/99 and 1426/711/2000 were stable. Using coefficient of Ecovalence (contribntion of each genotype in genotype x environment internction), it was clear that genotype 1233/848/99 scored the lowest value followed by 1195/901/99, 943/1151/93 and 1426/711/2000 indicating stability differences among faba bean genotypes over environments. The Kang andMagari method showed clearly that 4 genotypes on! of6 exhibited yield stability ofhigh performance.

Summary in Arabic.

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