MEAN PERFORMANCE AND STABILITY OF SOME GRAIN SORGHUM (Sorghum bicolor (L) Moench) UNDER DIVERS ENVIRONMEMTS.
Abstract: Twenty grain sorghum genotypes were evaluated under eight different environments (two nitrogen fertilizer levels, i.e 60 and 100 kg N/fad at two locations, i.e. Shandaweel and Assiut Agric Res Stns, ARC, in two successive growing seasons, 2004 and 2005). The combined analysis of variance over all environments indicated significant differences between all studied genotypes respecting grain yield and other agronomic traits. The response of genotypes to environments varied greatly and significantly, all genotypes exhibited better performance under high level of nitrogen fertilization (rich environments). The range of the studied traits ranged from 69.6-74.9 days for flowering date, 113.6-138.7 cm for plant height, 7.1-9.1 for number of green leaves/plant, 19.8-24.0 g for 1000-27.9-59.8 g/plant for grain yield/plant. Highly significant genotype-environment interaction was found for all studied characters. A large portion of this interaction was accounted for by the linear regression on the environmental means. The magnitude of non-linear components was considerably small. Stability parameters across all environments indicated that All hybrids exhibited significant linear response to environmental conditions. Five genotypes, i.e., BTX-629, BTX-630, ICSB-88003, ICSB-20 and ICSB-155 showed stability in grain yield and other traits since they had high means and exhibited high regression coefficient (approximately one).
Publication year 2007
Pages 407:420
Organization Name
serial title Egypt. J. of Appl. Sci
Author(s) from ARC
Publication Type Journal
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