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Stability Parameters in Yield of White Mustard (Brassica Alba L.) in Different Environments

By T. H. S. Abou El-nasr, M. M. Ibrahim and K. A. Aboud


Abstract: Stability parameters of 20 genotypes of white mustard were evaluated under four environments in two locations and assessed using three different stability methods. The investigation included five characters (plant height, number of primary branches, number of secondary branches, number of pods on main branch and seed yield). Results revealed significant genotype × environment interactions for all studied traits and the response to environmental changes of each genotype differed as indicated by M.S. pooled deviation and heterogeneity items. Wider ranges of regression coefficient values were observed from the studied stability methods suggesting possibility of selection for specific genotypes patterns. Four genotypes (No. 6, 10, 12 and 13) were most stable for studied characters in four environments. Genetic characterization of white mustard genotypes by SDS-PAGE analysis of protein fractions revealed differences in the banding profile pattern in the altered environment (clay vs. sandy soils). Moreover, some other protein bands were also found in the sandy soil more than in the clay soil. Key words: Selection white mustard genotype-environment interaction stability measurement

Year: 2014
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