- T.M. Boerma (1)
- F.A. Eeuwijk van (1)
- A.M. Lans van der (1)
- C.J.P. Lindeloof van de (1)
- C.P.J. Lindeloof van de (1)
- H.J.M. Löffler (2)
- E.J. Meulenbroek(older publications) (1)
- E.J. Meulenbroek (2)
- P. Riepma (1)
- P.C.L. Rijbroek van (6)
- P. Rijbroek van (1)
- E.J.A. Roebroeck (1)
- Th.P. Straathof (2)
- W.E. Weg van de (1)
Fusarium resistance in Gladiolus: effects of plant material and testing conditions on the infection of cultivars
Rijbroek, P.C.L. van; Löffler, H.J.M. ; Eeuwijk, F.A. van; Straathof, Th.P. ; Lans, A.M. van der - \ 1997
Acta Horticulturae 430 (1997). - ISSN 0567-7572 - p. 711 - 718.
Fusarium oxysporum f.sp. gladioli is the most important pathogen of Gladiolus. Cultivation of both corms and flowers is hampered by this fungus. Resistant cultivars are therefore much desired and partial resistance was found within the commercial gladiolus assortment. To assess the Fusarium resistance of cultivars for breeding purposes a standard assay is in use at CPRO-DLO. Genotypes are planted in infested soil. The resistance level is determined six to eight weeks after planting, by calculating the relative length (RL) of the shoots, i.e., length of shoots in infested soil divided by length of shoots in control soil. No information about effects of corm origin, corm size, corm cleaning, temperature or inoculum concentration is known. For Values for Cultivation and Use purposes (VCU) more information is needed about these conditions. Therefore this was investigated in the present study. The disease incidence of a number of cultivars with differing Fusarium resistance was assessed with various corm treatments. In all our experiments, a significant cultivar effect was found. No cultivar by treatment interactions were detected. A significant corm origin effect was also found. For VCU purposes, corms from different growers (mostly breeders), must be cultivated during one year under equal conditions. The corm size had no significant effect on the level of Fusarium infection. Significant corm cleaning effects were found. Dehusking and disinfection of the corm gave a significantly higher infection level. For further tests corm cleaning is not advised, since by damaging the corm secondary infections may occur. Significant temperature and inoculum concentration effects were found. A higher temperature and a higher inoculum concentration gave a higher disease incidence. Both parameters can be manipulated to influence the time course of an assay.
Development of a screening method for resistance to Phytophthora cactorum
Rijbroek, P.C.L. van; Meulenbroek, E.J. ; Lindeloof, C.P.J. van de - \ 1997
Acta Horticulturae 439 (1997). - ISSN 0567-7572 - p. 181 - 183.
In The Netherlands the fungus Phytophthora cactorum, which causes crown rot in strawberry plants, has become a problem. Because of high losses of plants and the difficulty of chemical control, resistant cultivars are wanted. Therefore we wish to develop an efficient, reliable and fast screening method, which can be used for breeding and for determining the Value for Cultivation and Use (VCU) with regard to Plant Variety Rights. In previous research cultivars were screened by a "crown-test", which is destructive, inaccurate and very laborious. So a new method was developed using a hydroponic system (NFT). Runners of different cultivars were planted out in rockwool plugs, followed by artificial inoculation of the NFT system with a spore suspension of P. cactorum. The resistance level was determined by the period between infection and plant death. Large differences in resistance between cultivars were found. Susceptible cultivars started dying ten days after infection. Highly resistant cultivars were still apparently healthy after 90 days. Results corresponded well with earlier experiences. The test proved to be sufficiently accurate for testing cultivars.
Fusarium resistance in Gladiolus: the development of a screening assay
Löffler, H.J.M. ; Straathof, Th.P. ; Rijbroek, P.C.L. van; Roebroeck, E.J.A. - \ 1997
Journal of Phytopathology 145 (1997). - ISSN 0931-1785 - p. 465 - 468.
Perspectieven voor veredeling op resistentie tegen meeldauw in aardbei : een literatuurstudie
Rijbroek, P.C.L. van; Meulenbroek, E.J. - \ 1996
Wageningen : CPRO-DLO - 18
ziekteresistentie - erysiphales - fragaria - meeldauw - plaagresistentie - plantenveredeling - plantenziekteverwekkende schimmels - aardbeien - sphaerotheca - disease resistance - mildews - pest resistance - plant breeding - plant pathogenic fungi - strawberries
|Perspectives for breeding for resistance against powdery mildew in strawberry
Rijbroek, P.C.L. van; Lindeloof, C.J.P. van de; Meulenbroek, E.J. ; Weg, W.E. van de - \ 1996
Eucarpia Fruit Breeding Section Newsletter 2 (1996). - p. 5 - 5.
|4e Beschrijvende Rassenlijst voor Siergewassen: Bloemisterijgewassen 1994-95
Boerma, T.M. ; Rijbroek, P.C.L. van - \ 1995
Hilversum : De Boer Mailing Service - 236 p.
Rijbroek, P. van; Riepma, P. - \ 1981
Wageningen etc. : R.I.V.R.O. [etc.] (Rassenbericht / Rijksinstituut voor het Rassenonderzoek van Cultuurgewassen no. 614) - 6
brassica oleracea var. gemmifera - spruitjes - nederland - brussels sprouts - netherlands