In the course of the research, F3 hybrid combinations of winter bread wheat were evaluated for spike productivity traits and homeostaticity and breeding value for these traits were determined in 2022 and 2023. 30 hybrid combinations of F3 winter bread wheat hybrids created at the Winter Wheat Breeding Laboratory of the V.M. Remeslo Myronivka Institute of Wheat of the National Academy of Agrarian Sciences of Ukraine were the object of research. A significant difference between the hybrids was found both in the level of the spike productivity traits and in their variability during the years of the research. The adaptive properties of the hybrid combinations were evaluated by determining the indicators of homeostaticity (Hom) and breeding value (Sc). It was determined that F3 hybrid combinations of winter bread wheat had different levels of homeostaticity and breeding value. The most valuable are the hybrids that combine high homeostaticity and breeding value with a high level of productivity traits. After analysing the results of study on the traits “length of the main spike”, “grain number per main spike” and “grain weight per main spike” it was found that the reciprocal combination of MIP Fortuna ↔ (Donskoy Prostor / Slavna) was characterised with low variation (V) from 0% to 0.2% and high breeding value. A higher level of homeostaticity was characteristic of the reverse combination (Donskoy Prostor / Slavna) / MIP Fortuna and exceeded the average for the following traits: spike length (Hom = 252, average 170), grain number per spike (Hom = 577, average 488.5). These genotypes can be used as sources of spike productivity with high homeostaticity
hybrid combination, homeostaticity, Fusarium head blight, backgrounds, coefficient of variation, winter bread wheat, breeding value
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