eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2024-08-30 12 2 658 669 20609 article Niguse chewaka 1 Ermias Estifanos 2 Negash Galeta 3 Ethiopian Institute of Agricultural Research, Werer Agricultural Research Center P.O.Box.2003, Addis Ababa, Ethiopia Ambo University School of Agriculture, Department of Plant Science, Ambo, Ethiopia Ethiopian Institute of Agricultural Research, Kulumsa Agricultural Research Center, Kulumsa, Ethiopia Bread wheat (Triticum aestivum L.) is a major grain crop and staple in many regions of the world. The objective of this research is to discover high-yielding genotypes while also analyzing gene variation, heritability, and progress of yield-determining variables related to bread wheat genotypes. As a result, this study assesses the production potential, genetic diversity, and heritability of bread wheat genotypes produced under irrigated settings in Ginchi, Ethiopia.  Sixty-four bread wheat advanced pure lines and standard checks were evaluated using a simple lattice (8X8) design. The results show considerable phenotypic and genotypic variations among the tested genotypes for all considered traits. Traits such as grain yield per hectare, biomass yield, number of kernels per spike, and thousand kernels weight showed moderate phenotypic coefficients of variation. Broad sense heritability ranged from 30% for biomass yield to 91% for days to 50% heading. Expected genetic advance as percent of means values ranged from 3.73% for days to 50% emergence to 16.91% for thousand kernel weight. The identified high-yielding genotypes, G31, G11, G51, G6, G3, G34, G23, G5, G41, and G59, have shown promising potential for advancing the breeding objectives in the field of irrigated wheat. The study concludes that the use of these traits for direct selection would bring advancement. The future scope of this research lies in the confirmation of the identified high-yielding genotypes in multi-location and season trials to further advance the breeding objectives in the field of breeding programs. https://www.agriculturejournal.org/volume12number2/genetic-variability-in-bread-wheat-triticum-aestivum-l-genotypes-under-irrigated-condition/ Bread wheat; Genetic variability; Heritability; Irrigated; Yield-related traits