Cucurbit Genetics Cooperative Report 6:29-31 (article 15) 1983 J. T. Sloane, T. C. Wehner, and S. F. Jenkins, Jr. North Carolina State University, Raleigh, NC 27650 Belly rot of cucumber (Cucumis sativus L.) caused by Rhizoctonia solani Kuhn is an important disease in the southern U.S.A. The average annual loss of cucumbers to belly rot in the U.S. […]
Month: July 1983
Different Resistance of Non-bitter Cucumbers to Tetranychus urticae in the Netherlands and the USA
Cucurbit Genetics Cooperative Report 6:27-28 (article 14) 1983 O. M. B. de Ponti, G. G. Kennedy, and F. Gould Institute for Horticultural Plant Breeding, P.O. Box 16, 6700 AA Wageningen, The Netherlands (first author); North Carolina State University, Raleigh, NC 27650 (second and third authors) Opinions on the relation between the bitter principle cucurbitacin-C and […]
Variation of Galactinol Synthase Activity in Cucumber Leaves
Cucurbit Genetics Cooperative Report 6:25-26 (article 13) 1983 D. M. Pharr, T. C. Wehner, L. W. Handley, and H. N. Sox North Carolina State University, Raleigh, NC 27650 Galactinol synthase (GS) catalizes the following reaction in cucumber leaves: UDP-galactose + myoinositol galactinol + UDP Galactinol is the immediate substrate from which galactose is transferred to […]
Umbrella Leaf: A Gene for Sensitivity to Low Humidity in Cucumber
Cucurbit Genetics Cooperative Report 6:24 (article 12) 1983 A.P.M. den Nijs and I. W. Boukema Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands In a previous program to introduce parthenocarpy into the pickling cucumber, de Ponti (unpublished data) noticed distinct differences between breeding lines in their sensitivity to low relative humidity […]
Results of Linkage Studies and the Need for a Cooperative Effort to Map the Cucumber Genome
Cucurbit Genetics Cooperative Report 6:22-23 (article 11) 1983 A.P.M. den Nijs and I. W. Boukema Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Since the first comprehensive compilation of the genes of the Cucurbitaceae (1), several additions have been published by the Cucurbit Gene List Committee of the Cucurbit Genetics Cooperative […]
Genetic Evidence for Substantial Lateral Growth of Pollen Tubes in the Cucumber Ovary
Cucurbit Genetics Cooperative Report 6:20-22 (article 10) 1983 A.P.M. den Nijs Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Competition of two types of pollen for the available ovules impedes the success of mentor pollen aiding interspecific crosses in cucumber (2). Mixed pollinations such as those involving mentor pollen are only […]
Pickling Cucumber Population Improvement for Increased Fruit Yield
Cucurbit Genetics Cooperative Report 6:18-19 (article 9) 1983 K. Lertrat and R. L. Lower University of Wisconsin, Madison, WI 53706 Low fruit number per plant (i.e. fruit yield) is the major yield-limiting factor of all existing pickling cucumber cultivars for a once-over mechanical harvesting system. Fruit yield average over three years under commercial field conditions […]
Pickling Cucumber Inbred Line Development by Full-sib Family Selection
Cucurbit Genetics Cooperative Report 6:16-17 (article 8) 1983 K. Lertrat and R. L. Lower University of Wisconsin, Madison, WI 53706 In an inbred-hybrid breeding system, inbred line development or extraction is preceded by a population improvement phase. Full-sib family selection as proposed by corn breeders (1, 2, 4) is a suitable method for extracting inbred […]
Ulocladium cucurbitae Leafspot on Cucumber (Cucumis sativus)
Cucurbit Genetics Cooperative Report 6:14-15 (article 7) 1983 David P. Lane and Henry M. Munger Cornell University, Ithaca, NY 14853 In cucumber breeding plots at Ithaca, cucumber mosaic virus (CMV) resistant progenies with ‘Ashley’ and ‘Poinsett’ in their parentage have repeatedly shown more severe leafspot symptoms and earlier defoliation than other cucumbers with comparable CMV […]
A Second Long Hypocotyl Mutant at the lh Locus
Cucurbit Genetics Cooperative Report 6:13 (article 6) 1983 M. Koornneef and B. J. van der Knaap Department of Genetics, Agricultural University, Wageningen, The Netherlands (first author); Deruiterzonen B.V., Bleiswijk, The Netherlands (second author) Monogenic mutants having an elongated hypocotyl when grown in white light have been described for several loci in plants like Arabidopsis thaliana (2) and […]