Phenotypic performance of Rice cultivars under different locations and tow Nitrogen fertilizer conditions in Egypt [electronic resource]

Includes bibliographic reference

Field experiments were conducted at different locations, northern part of the Nile Delta, to study the interaction, adaptability and stability of grain yield and its related traits for three rice cultivars (GizaI79, Hybrid1 and Sakha106) and to develop a technology package for the studied rice planting in different locations; namely, Kafr EL-Sheikh, Sharkia, Dakahlia, Damietta, Gharbia and Bihera governorates, Egypt, under two nitrogen fertilizers [ 69N (urea) and compost (2 t/fed.) + 46N (urea)]. The results of combined analyses of variance indicated significant differences among locations (L), cultivars (C), nitrogen fertilizers (F), L x C, L x F, ex F and L x C x F for all the traits studied, except for 100-grain weight for( L x C interaction; plant height, panicle length, number of tillers/ plant, panicle weight and sterility percentage( for L x F interaction and plant height, panicle length, number of tillers/ plant, number of panicles/plant, panicle weight and grain yield( t/feddan) (for L x C x F interaction). Adaptability and stability were determined, according to Eberhart and Russell's procedures. The environment + (cultivar x environment) were significant for all the characters studied, indicating distinct nature of environments and cultivar x environment interactions in phenotypic expression. The cultivar x environment (linear) interaction component showed significance for all the characters studied.These findings indicated that significant differences among the cultivars, for linear response to environments (bi) behavior of the cultivars, could be predicted over environments more precisely and C x L interaction was outcome of the linear function of environmental components. Among the three rice cultivars evaluated, Hybrid 1 and Sakha l06 gave the regression coefficient 1.26 and 1.32 exhibited high stability of yield where the regression coefficient was more than unity with low deviation from regression, approximately,zero value. Therefore, the cultivars.. Hybrid land Sakha106 were superior and strongly suggested for planting at multiplication trials at regions of Egypt under both treatments of fertilizer.

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