Reciprocal Crosses Between Cucumis africanus L.f. and C. metuliferus Naud. III. Effects of Pollination Aids, Physiological Condition and Genetic Constitution of the Maternal Parent on Crossability

Cucurbit Genetics Cooperative Report 4:50-53 (article 27) 1981 J. B. M. Custers, A. P. M. den Nijs and A. W. Riepma Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands The positive effect of mentor pollen and amino-ethoxy-vinyl-glycine (AVG) on the success of reciprocal crosses between Cucumis africanus L.f. and C. metuliferus […]

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“Divided Leaf”, a Recessive Seedling Marker in Cucumber

Cucurbit Genetics Cooperative Report 3:24 (article 13) 1980 A.P.M. den Nijs and H.O. Mackiewicz Institute for Horticultural Plant Breeding, Wageningen, The Netherlands (first author); Department of Genetics, Research Institute of Vegetable Crops, Reguly, Poland (second author) A leaf mutant was obtained by Mackiewicz following ethylenimine treatment of several Polish pickling cucumber cultivars. The character seemed […]

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Effectiveness of AVG for Inducing Staminate Flowers on Gynoecious Cucumbers

Cucurbit Genetics Cooperative Report 3:22-23 (article 12) 1980 A.P.M. den Nijs Institute for Horticultural Plant Breeding, Wageningen, The Netherlands The amino-ethoxy of rhizobitoxine, amino-ethoxy-vinyl-glycine (AVG), inhibited ethylene production in muskmelon seedlings and improved fruit set following hand-pollination of emasculated muskmelon flowers (1). Staminate flowering in gynoecious cucumbers can be induced by gibberellins, silver nitrate (AgNO3) […]

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Reciprocal Crosses Between Cucumis africanus L.f. and C. metuliferus Naud. I. Overcoming Barriers to Fertilization by Mentor Pollen AVG

Cucurbit Genetics Cooperative Report 3:60-62 (article 33) 1980 A. P. M. den Nijs, J. B. M. Custers and A. J. Kooistra Institute for Horticultural Plant Breeding, Wageningen, The Netherlands Cucumis africanus L.f. carries resistance to cucumber green mottle mosaic virus, and C. metuliferus Naud. to root knot nematodes. We wish to introduce these resistances into the cultivated cucumber, C. […]

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Problems with the Identification of Cucumis L. taxa

Cucurbit Genetics Cooperative Report 3:55-59 (article 32) 1980 L. van Leeuwen and A.P.M. den Nijs Institute for Horticultural Plant Breeding, Wageningen, The Netherlands The Cucumis-working group at our Institute attempts to introduce resistances of several African species of Cucumis L. into the cultivated cucumber C. sativus L. We have, therefore, collected a large number of species from all over the […]

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In Vivo Pollen Tube Growth as a Measure of Interspecific Incongruity in Cucumis L.

Cucurbit Genetics Cooperative Report 3:52-54 (article 31) 1980 Y.O. Kho, A.P.M. den Nijs and J. Franken Institute for Horticultural Plant Breeding, Wageningen, the Netherlands Pollen tube growth in the style was studied in a diallel involving ten African species of Cucumis as well as C. sativus L. Several workers have studied interspecific relationships within the genus by assessing fruit […]

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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 […]

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Low Temperature Adapted Slicing Cucumbers Release

Cucurbit Genetics Cooperative Report 2:13 (article 8) 1979 A. P. M. den Nijs Institute for Horticultural Plant Breeding, Wageningen, The Netherlands The Institute for Horticultural Plant Breeding (IVT) has since 1974 attempted to adapt slicing cucumbers for winter/spring glasshouse cultivation to lower temperatures. Fuel costs take a major share of total production expenses so that […]

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1979 Stocks and Germplasm Desired or for Exchange

Cucurbit Genetics Cooperative Report 2:54-56 (article 30) 1979 Stocks Desired J.M. Crall Watermelon lines with gummy stem blight resistance for crossing with the most advanced lines in our progeny selection program. J.D. McCreight Chlorophyll deficient stocks and stocks having any one or more of the following genes of Cucumis melo: g, gynomonoecious; gp, green petals; h, […]

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