Стійкість перспективних гібридів картоплі до фітофторозу / Resistance of promising potato hybrids to late blight
Journal Title: Вісник Львівського національного аграрного університету. Агрономія - Year 2018, Vol 22, Issue
Abstract
The article presents results of the research concerning late blight resistance of promising hybrids of potato, obtained from crossing of Zakhidna variety and hybrids, selected with its participation. Estimation of standard varieties and the studied hybrids concerning their resistance to late blight proved that descendants of different crossings had different combining ability concerning formation of the feature of field resistance to late blight. Results of the research prove that the promising hybrids of potato combine a high productivity with improved and high resistance of their tops to late blight. They include hybrids 94/89-6 × Zakhidna, Zakhidna × 02/12-18, 00/20-4 × 02/105-2, which can be further applied in selection work. According to the data of visual phytopathological estimation, affection of the top of the mentioned hybrids, being diseased with late blight in the field conditions, constituted only 10–30 %. Thus, indicators of the top affection determine that resistance of the hybrids constitutes 7-8 points according to the international 9-point scale. However, as of August 6, affection of the early ripe Bellarosa standard variety constituted 90 %, medium ripe Volia variety – 70 % and medium late Zakhidna variety – 50 %. The combinations, being the most valuable for the further selection concerning yield capacity included the varieties, which demonstrated a high frequency of reveal of high-yield genetypes, brought to a competitive testing of varieties. They include the following valuable combinations of crossings: Zakhidna х 02/12-18, 94/89-6 × Zakhidna, 00/20-4 × 02/105-2, 00/20-4 × 02/105-2, 99/27-22 × 02/2-7. Basing on efficient choice of parent pairs for crossing, the authors created potato hybrids with productivity of 1049-1160 g/bush, or 42–48 ton/ha. Most of the obtained hybrid forms exceed the standard by the indicator of yield capacity.
Authors and Affiliations
Petro Zaviriukha, Ivan Dudar, Olha Dudar
Keywords
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