Creation of winter wheat source material with increased adaptive potential to adverse environmental conditions
Abstract
The goal until the last day was to create a new sort with high indicators of productivity, adaptability and quality of grain on the basis of the directed selection process and comprehensive study of hybrid material on field and laboratory estimations.
Creation of initial material with high productivity, adaptability and grain quality by directed selection and hybrid material comprehensive study is described. General scientific, special genetic, field, laboratory methods, morphological analysis and statistical methods were used in the research. Given that the weight of grain from 1 ear is a marker in breeding for high yield (r=0.53), the largest (50 %) positive transgressions were in F1 hybrids using new genetic plasma varieties. Among hybrid populations F2, F3 and F4, selection value is represented by hybrid populations 4971 and 4976, which have the lowest stress resistance (–16.1, –18.6) and variation (16.9, 19.9) and the highest genetic stability (50.0, 50.2) and homeostaticity (19.1, 14.3), respectively. Among Control, Preliminary and Competitive tests, lines UK2621/18 and UK9855/18 have high stress resistance (–4.7, –5.8), homeostaticity (1416.0, 1008.0) and low variability (2.6 %, 3.5 %), respectively. They are the most adaptive and malleable to average and adverse environmental conditions. Line UK1182/17, which in 2020 was submitted for consideration to the State variety testing as "Blahovishchenska" (Kiev, Ukraine), was created using the purposeful method of pedigree in each link of selection. It has high adaptability, resistance to lodging, major diseases, high average yield (90.8 c/ha), and grain quality – it is strong wheat (protein amount 13.5–14.0 %, gluten – 30–35 %). Pedigree is the most effective method of continuous individual selection, which allows creating source material with high productivity, resistance to disease and adverse environmental factors
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