Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 321492
Title Leaf position prevails over plant age and leaf age in reflecting resistance to late blight in potato
Author(s) Visker, M.H.P.W.; Keizer, L.C.P.; Budding, D.J.; Loon, L.C. van; Colon, L.T.; Struik, P.C.
Source Phytopathology 93 (2003). - ISSN 0031-949X - p. 666 - 674.
Department(s) PRI Biodiversity and Breeding
PRI Biometris
Crop and Weed Ecology
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) phytophthora-infestans - foliage - cultivars - susceptibility - glasshouse - genes
Abstract The effects of plant age, leaf age, and leaf position on race-nonspecific resistance against Phytophthora infestans were investigated in a series of field and controlled environment experiments with five different potato (Solanum tuberosum) cultivars. Leaf position proved to be the most significant factor; apical leaves were far more resistant to late blight than basal leaves. Plant age and leaf age had only minor effects; therefore, the resistance of a specific leaf remained about the same during its entire lifetime. The gradual increase in late blight resistance from basal leaves to apical leaves appeared to be a general effect, irrespective of cultivar, growing conditions, or resistance test. Therefore, it is important to consider leaf position in tests for late blight resistance, because contrasts in resistance may be ascribed erroneously to differences between genotypes or treatments. whereas they are actually caused by differences in leaf position.
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