Selection for grain yield in bread wheat under normal irrigation and drought stress conditions [electronic resource].

Includes references.

To improve grain yield/plant, two cycles of pedigree selection were achieved in a segregating population of wheat (Triticum aestivum L.) in the F4, F5 and F6 generations under normal and drought stressed environments. Significant differences (p<0.01) among the selected families for the selection criterion; grain yield/plant were observed in all the studied traits under the two environments in F4 and F6-generations. After two cycles of pedigree selection for grain yield/plant the values of gcv and pcv were decreased from F 4 to F6-generation in all traits under both environments and were very close to each other, resulted in very high estimates of heritability in broad sense which calculated from the .expected mean squares. The average direct gain in grain yield/plant was 90.20, 70.14 and 37.64, 52.46% from the bulk sample and the better parent under normal irrigation and drought stress; respectively. Under irrigation, the best five families, No.127, No.146, No.273, No.377 and No.452 outyielded the better parent Giza 168 by 38.87, 46.57, 42.63, 56.75 and 64.96%; respectively.

Summary in Arabic.

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