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YIELD AND RESISTANCE TO LEAF DISEASES OF MODERN WINTER BREAD WHEAT VARIETIES UNDER THE LIMITING INFLUENCE OF BIOTIC FACTORS

Article language

Українська

Print date

23.12.20

Date posted online

29.04.2021

Institution

Plant Production Institute named after V. Ya. Yuriev NAAS National Center for Plant Genetic Resources of Ukraine, Poltava State Agrarian Academy

Bibliography

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Section

SOURCES AND DONORS

Abstract

Aim. To identify new sources of resistance of winter bread wheat to powdery mildew, Septoria leaf blotch, brown leaf rust and of high yield capacity under the conditions of the northeastern part of the Left-Bank Forest-Steppe of Ukraine.

Results and Discussion. The study of modern varieties of winter bread wheat on epiphytoties identified 88 sources with high (7-9 points) individual resistance to leaf diseases were identified, including 40 sources of resistance to powdery mildew, 20 sources of resistance to Septoria leaf blotch, and 28 sources of resistance to brown leaf rust. We selected 12 accessions of the highest breeding value due to their group resistance to powdery mildew, Septoria leaf blotch and brown leaf rust, among which domestic accessions bred by the Institute of Plant Physiology and Genetics of NAS of Ukraine and the VM Remeslo Myronivka Institute of Wheat of NAAS were predominant. As to foreign institutions, varieties bred at the RUE "Scientific and Practical Center for Agriculture of Belarus of NAS" stood out. Among the mid-tall sources of group resistance to powdery mildew, Septoria leaf blotch and brown leaf rust, three domestic genotypes with high yields (116-155% related to the check variety) were distinguished: Darynka Kyivska, Amina, Vezha Myronivska (UKR). Among the semi-dwarfs, Novosmuhlianka and Koliada (UKR) were the best varieties in terms of yield (152% related to the check variety).

Conclusions. It was determined that there were moderate or strong positive correlations between the resistance of the winter bread wheat accessions under investigation to leaf diseases on epiphytoties and yield capacity (r = 0.47-0.60) with the greatest significance (P <0.01). At the same time, Septoria-induced reduction in the yields was more conspicuous than that caused by brown leaf rust and especially by powdery mildew. The identified winter bread wheat sources of resistance to powdery mildew, Septoria leaf blotch, and brown leaf rust as well as of high yield capacity are valuable starting material for breeding new highly resistant to biotic factors varieties.

Keywords

accessions, winter bread wheat, powdery mildew, Septoria leaf blotch, brown leaf rust, yield, source, reference variety