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 525521
Title Over de differentiatie van Phytophthora infestans (Mont.) de Bary en de vererving van de resistentie van Solanum demissum Lindl.
Author(s) Mastenbroek, C.
Source University. Promotor(en): J.C. Dorst; A.J.P. Oort. - Amsterdam : Kinsbergen - 121
Publication type Dissertation, internally prepared
Publication year 1952
Keyword(s) plantenziekteverwekkende schimmels - solanum tuberosum - aardappelen - phytophthora - plant pathogenic fungi - potatoes
Categories Oomycota / Plant Defence, Plant Resistance
Abstract In 1943 the breeding work on immunity to blight (Phytophthora infestans) on the Plant Breeding Station of the Central Bureau at Hoofddorp started by using the two races then known in the Netherlands; later 7 new races of Phytophthora were found. The spectra of all known races were investigated and test series composed. The relationships and differences between the races were outlined in schemes.
Segregations in the crosses investigated by repeated inoculations with distinct races could be explained by the hypothesis of three genes for immunity. Segregation ratios indicated that these genes were dominant allelomorphs of three independent genes.

Other authors postulated genetical factors in explaining their observations. To coordinate the hypotheses test series were exchanged.

Although differentiation had been known already for about 25 years the 'new' races were not found on varieties of Solanum tuberosum in practice. This supported the supposition that the 'common' race was superior to the other races on varieties of S. tuberosum.

Some specimens of S.demissum and other Solanum spp. were tested for susceptibility to 8 races. There were great differences between the varieties of S. demissum. Some of the progenies of single plants were homozygous for immunity.
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