Cucurbit Genetics Cooperative Report 6:89-90 (article 45) 1983 O. Shifriss1 Rutgers University, New Brunswick, NJ 08903 The silvery-leaf trait is conditioned by gene M. This gene can bring about a breakdown of intercellular cohesion in the upper tissue of the leaf, leading to air spaces between the palisade cells as well as between the palisade […]
Squash & Pumpkin Reports
Influence of Temperature and Humidity on Longevity of Squash Pollen
Cucurbit Genetics Cooperative Report 6:91 (article 46) 1983 Yong-Jian Wang and R. W. Robinson Seed and Vegetable Sciences Department, New York State Agricultural Experiment Station, Geneva, NY 14456 It would be convenient in squash breeding to store pollen for extended periods, particularly with late maturing or photoperiodic germplasm that does not flower sufficiently early to […]
Hybridization of Cucurbita pepo with Disease Resistant Cucurbita Species
Cucurbit Genetics Cooperative Report 6:92 (article 47) 1983 Richard L. Washek and Henry M. Munger Cornell University, Ithaca, NY 14853 Several Cucurbita species, mostly non-cultivated, are sources of resistance to cucumber mosaic, watermelon mosaic-1, watermelon mosaic-2, squash mosaic and powdery mildew (3). Through embryo culture, C. pepo was hybridized successfully with C. martinezii (now considered […]
1983 Squash Report
Report No. 6 Squash and Pumpkin (Cucurbita spp.) Overcoming the silvering disorder of Cucurbita Y. Burger, H.S. Paris, H. Nerson, Z. Karchi and M. Edelstein (Israel) CGC 6:70-71 (1983) Effect of fruit thinning on dry matter accumulation and variability in Cucurbita maxima winter squash Deborah Evans and Brent Loy (USA) CGC 6:72 (1983) A report of cucurbitacin poisonings in […]
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 […]
Sources of Resistance or Tolerance to Viruses in Accessions of Cucurbita maxima
Cucurbit Genetics Cooperative Report 5:46-47 (article 23) 1982 R. Provvidenti New York State Agricultural Experiment Station, Cornell University, Geneva, New York 14456 Sources of resistance to cucumber mosaic virus (CMV) and watermelon mosaic virus 2 (WMV-2) , and tolerance to watermelon mosaic virus 1 (WMV-1) were recently found in three foreign accessions of Cucurbita maxima. Resistance […]
On the Silvery-Leaf Trait in Cucurbita pepo L.
Cucurbit Genetics Cooperative Report Volume 5:48-50 (article 24) 1982 O. Shifriss Department of Horticulture and Forestry, Cook College, Rutgers University, New Brunswick, NJ 08903 Recent observations and breeding data suggest that there exists a silvery-leaf (SL) trait whose expression is subject of marked genetic and non-genetic variations, that the genetic variants include M / M for mottled leaves (2) […]
Comparison of Seed Coat Development and Composition in Normal and Hull-less Strains of Pumpkin (Cucurbita pepo L.)
Cucurbit Genetics Cooperative Report 5: 51-52 (article 25) 1982 S.G. Stuart and J.B. Loy University of New Hampshire, Durham, NH 03824 Pumpkin seeds normally develop a well-defined, five-zoned seed coat or testa (1) by ten to fifteen days post-anthesis (2). In 1934, Tschermak-Seysenegg reported a ‘naked-seeded’ or hull-less mutant in pumpkin which did not develop […]
On White Cotyledons in Cucurbita pepo L.
Cucurbit Genetics Cooperative Report 5:39 (article 19) 1982 Helen Atthowe and O. Shifriss Department of Horticulture and Forestry, Cook College, Rutgers – the State University, New Brunswick, NJ 08903 In the fall of 1981, during a routine work of transplanting squash seedlings, one of us (H.A.) discovered that the lower side of the cotyledons of […]
Cucurbitacins of Cotyledons of Cucurbitaceae Cultivars as Related to Diabroticite Beetle Attack
Cucurbit Genetics Cooperative Report 5:42-43 (article 21) 1982 J. E. Ferguson, Esther R. Metcalf, Robert L. Metcalf and A. M. Rhodes Departments of Entomology and Horticulture, University of Illinois, Urbana, Champaign The worldwide culture of many species and varieties of Cucurbitaceae is complicated by the feeding of many species of rootworms, cucumber beetles, pumpkin beetles, […]