Cucurbit Genetics Cooperative Report 9:33-36 (article 9) 1986 D.L. Visser Institute for Horticultural Plant Breeding (IVT), P.O. Box 16, 6700 AA Wageningen, The Netherlands Leaf area measurements are an essential part of growth analyses. For most measurements, plants need to be defoliated so that leaf area can be measured with a photo-electrical area meter. Growth […]
D.L. Visser
Monogenic Inheritance of Andromonoecy in Tetraploid Cucumis ficifolius A. Rich
Cucurbit Genetics Cooperative Report 7:100-101 (article 45) 1984 Visser, D.L. and A.P.M. den Nijs Institute for Horticultural Plant Breeding (IVT), P.O.B. 16, 6700 AA Wageningen, The Netherlands Spontaneous fruit and seed set was observed in one out of ten plants of Cucumis ficifolius A. Rich (Genebanknumber 2061, IVT collection from Kenya), grown under isolation in […]
Improving the Fertility of Tetraploid Cucumbers
Cucurbit Genetics Cooperative Report 7:12-13 (article 6) 1984 A.P.M. den Nijs and D.L. Visser Institute for Horticultural Plant Breeding (IVT), P.O.B. 16, 6700 AA Wageningen, The Netherlands In our breeding program to introduce resistance genes from wild Cucumis species into C. sativus, we have attempted to overcome crossing barriers by using tetraploid cucumbers as the […]
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. […]
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 […]
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 […]
The Cucumis Species Collection at the IVT
Cucurbit Genetics Cooperative Report 3:66-67 (article 37) 1980 D. L. Visser and A. P. M. den Nijs Institute for Horticultural Plant Breeding (IVT), Wageningen, The Netherlands A Cucumis species collection has been built up at our institute in the past three years to provide a basis for the species crossing program. At this time our collection consists […]
Silver Compounds Inducing Male Flowers in Gynoecious Cucumbers
Cucurbit Genetics Cooperative Report 2:14-15 (article 9) 1979 A. P. M. den Nijs and D. L. Visser Institute for Horticultural Plant Breeding, Wageningen, The Netherlands Silver nitrate is now used widely in the greenhouse in The Netherlands. Occasionally, however, the treatment with AgNO3 results in severe burning and even loss of plants, especially when conditions […]
Use of In vitro Culture for Inducing Germination of Cucumis Seed
Cucurbit Genetics Cooperative Report 2:46-47 (article 28) 1979 D. L. Visser and J. Franken Institute for Horticultural Plant Breeding, Wageningen, The Netherlands Several 10-year old seed samples of accessions of wild Cucumis species in the breeding collection of the Institute for Horticultural Plant Breeding did not germinate under standard conditions, which included heat treatments as used for […]