Evaluation of cucumber (<Emphasis Type="Italic">Cucumis sativus</Emphasis>) cultivars grown in Eastern Europe and progress in breeding for resistance to angular leaf spot (<Emphasis Type="Italic">Pseudomonas syringae</Emphasis> pv. <Emphasis Type="Italic">lachrymans</Emphasis>) |
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Authors: | Helena Olczak-Woltman Małgorzata Schollenberger Wiesław Mądry Katarzyna Niemirowicz-Szczytt |
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Institution: | (1) Department of Plant Genetics, Breeding and Biotechnology, Warsaw University of Life Sciences, ul. Nowoursynowska 159, 02-776 Warsaw, Poland;(2) Department of Plant Pathology, Warsaw University of Life Sciences, ul. Nowoursynowska 159, 02-776 Warsaw, Poland;(3) Department of Biometry, Warsaw University of Life Sciences, ul. Nowoursynowska 159, 02-776 Warsaw, Poland |
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Abstract: | Increased occurrence of cucumber angular leaf spot, Pseudomonas syringae pv. lachrymans, has caused significant losses in cucumber, Cucumis sativus, yield in Poland in recent years. These losses necessitated evaluation of the level of resistance in cucumber cultivars of
mainly Polish breeding, cultivated in Eastern Europe, and initiation of a breeding programme for resistance to this disease.
Screening for resistance was performed on 84 cucumber accessions under growth chamber conditions using a highly aggressive
strain of P. syringae pv. lachrymans. Most of the screened accessions were either susceptible or displayed intermediate resistance. The screening resulted in
the identification of five F1 hybrid cultivars moderately resistant to angular leaf spot. The identified F1 hybrids were self-pollinated up to the F4 generation. Individuals resistant to angular leaf spot were identified. These individuals can be used as a source of resistance
to angular leaf spot in future breeding efforts. |
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Keywords: | Angular leaf spot Cucumber hybrids Resistance |
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