Cucurbit Genetics Cooperative Report 6:96-98 (article 49) 1983 A. P. M. den Nijs and K. Hofman Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Screening for resistance to root knot nematodes is normally carried out in nematode-infested soil. Seeds, seedlings or young plants are placed in the infested soil and, after […]
A.P.M. den Nijs
Variation for Interspecific Crossability of Cucumis anguria L. and C. zeyheri Sond.
Cucurbit Genetics Cooperative Report 6:100-101 (article 51) 1983 D. L. Visser and A. P. M. den Nijs Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Cucumis anguria L. and C. zeyheri Sond. are both resistant to cucumber green mottle mosaic virus, a serious disease of glasshouse cucumbers. The resistance of C. […]
Growth of Parthenocarpic and Seed-bearing Fruit of Zucchini Squash
Cucurbit Genetics Cooperative Report 6:84-85 (article 42) 1983 A. P. M. den Nijs and J. Balder Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Large differences in parthenocarpic fruit set amongst zucchini squash cultivars were reported (1). Selection for parthenocarpy was successful and a breeding line with high tendency to parthenocarpic […]
Parthenocarpic Fruit Set in Glasshouse Grown Zucchini Squash
Cucurbit Genetics Cooperative Report 5:44-45 (article 22) 1982 A.P.M. den Nijs and N.J.D. Veldhuyzen van Zanten Institute for Horticultural Plant Breeding, P.O. Box 16, Wageningen, The Netherlands Zucchini squash is grown in the Netherlands in glasshouses in spring and fall. The crop has limited importance so far (annual sales less than a million guilders), but […]
Inheritance of Resistance to Cucumber Green Mottle Mosaic Virus (Cgm) in Cucumis anguria L.
Cucurbit Genetics Cooperative Report 5:57-58 (article 27) 1982 A.P.M. den Nijs Institute for Horticultural Plant Breeding, P.O. Box 16, Wageningen, The Netherlands Cucumber green mottle mosaic virus (Cgm), first described by Ainsworth (1), causes significant losses in the glasshouse culture of cucumbers in Western Europe and Japan (3, 5). Strict phytosanitary measures are necessary to […]
Rectification of the Names of Certain Accessions of the IVT-Cucumis Collection
Cucurbit Genetics Cooperative Report 5:59-60 (article 28) 1982 H.Q. Varekamp, D.L. Visser and A.P.M. den Nijs Institute for Horticultural Plant Breeding (IVT), P.O. Box 16, Wageningen, The Netherlands During last summer we were fortunate enough to have the assistance of the Royal Botanic Gardens at Kew to check the taxonomic determinations of our Cucumis species collection. We […]
Pathogenicity of Isolates of Didymella bryoniae and Reisolation of the Fungus Out of Symptomless Plants
Cucurbit Genetics Cooperative Report 4:17-19 (article 8) 1981 A. P. M. den Nijs and A. C. van der Giessen Institute for Horticultural Plant Breeding (IVT), P. O. B. 16, Wageningen, The Netherlands Five different isolates of Didymella bryoniae (Auersw.) Rehm, causal fungus of fruit and stem rot, were separately used to inoculate three cucumber genotypes […]
In Vitro and Sporulation of Didymella bryoniae and a Glasshouse Method for Screening for Resistance of Cucumber
Cucurbit Genetics Cooperative Report 4:6-8 (article 3) 1981 A. C. van der Giessen and A. P. M. den Nijs Institute for Horticultural Plant Breeding, P. O. B. 16, The Netherlands At the Institute for Horticultural Plant Breeding (IVT) a breeding project for resistance against Didymella bryoniae (Auersw.) Rehm, syn. Mycosphaerella citrullina (C.O.Sm.) Gross. (common names: […]
Seedling Death in Interspecific Crosses with Cucumis africanus L.f.
Cucurbit Genetics Cooperative Report 4:58-60 (article 30) 1981 A. P. M. den Nijs, D. L. Visser and J. B. M. Custers Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Three interspecific crosses with Cucumis africanus L.f. out of our crossability analysis of African Cucumis species (4) set seed, most of which […]
Species Crosses Under Controlled Temperature Conditions
Cucurbit Genetics Cooperative Report 4:56-57 (article 29) 1981 Y. O. Kho, J. Franken and A. P. M. den Nijs Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Pollen tube behavior and fertilization in selected crosses between species of Cucumis were studied at different temperatures in glasshouses of the I. V. T. […]