Cucurbit Genetics Cooperative Report 1:40 (article 37) 1978 R. W. Robinson and E. Kowalewski New York Agricultural Experiment Station, Geneva, NY 14456 Diallel reciprocal cross pollinations were made among cucumber, muskmelon, and l9 wild species of Cucumis. The only species that crossed with the cucumber was C. Hardwickii; and C. trigonus and C. callosus were the only species to cross with […]
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Comparative Electrophoresis of Isozymes of Cucumis Species
Cucurbit Genetics Cooperative Report 1:39 (article 36) 1978 J. T. Puchalski, R. W. Robinson, and J. W. Shail New York Agricultural Experiment Station, Geneva, NY 14456 Electrophoretic patterns of esterase, peroxidase, and leucine aminopeptidase of 24 different Cucumis species were compared. Large differences between several species were found for all these enzyme systems, but some other species […]
Interspecific Crosses of Cucumis Species
Cucurbit Genetics Cooperative Report 1:39 (article 35) 1978 J. D. Norton Auburn University Agricultural Experiment Station, Auburn, AL 36830 Interspecific crosses among Cucumis melo, C. metuliferus, and C. anguria have been attempted over a ten year period. In greenhouse experiments one cross of C. melo x C. metuliferus was accomplished. Further attempts to make this cross resulted in an occasional fruit set with normal fruit […]
White Fly Resistance in Cucumis Species
Cucurbit Genetics Cooperative Report 1:38 (article 34) 1978 E. Kowalewski3 and R. W. Robinson New York State Agricultural Experiment Station, Geneva, NY 14456 Cucumis species were evaluated for resistance to natural infestation with white flies in the greenhouse. Scanning electron and stereoscope microscope studies were made to determine if white fly resistance is related to morphology or […]
Dormancy of Cucumis Species
Cucurbit Genetics Cooperative Report 1:36-37 (article 33) 1978 Claude Heit, R. W. Robinson, and W. Mishanec New York Agricultural Experiment Station, Geneva, NY 14456 Dormancy is seldom a serious problem with seed of cucumber and muskmelon. Freshly harvested seed may be dormant, but this can usually be easily overcome by removal of the seed coats […]
Vegetable Improvement Newsletter No. 20
February 1978 Compiled by H.M. Munger, Cornell University, Ithaca, New York 1. Resistance in Sweet Corn to Colletotrichum graminocolum L.V. Gregory, L.J. Seybert, J.E. Ayers, and D.L. Garwood Departments of Plant Pathology and Horticulture, The Pennsylvania State University, University Park, Pennsylvania 16802 The inbreds PaIa453 ae du wx and PaIa5125 ae du wx were observed to differ in field reaction […]
Natural and Induced Mutations in C. pepo
Cucurbit Genetics Cooperative Report 1:35 (article 32) 1978 W. N. Whitwood and J. L. Weigle Robson Seed Farms, Hall, NY 14463 Mutations were induced in a cultivar of C. pepo, ‘Early Prolific Straight Neck’, by ethyl-methanesulfonate (EMS). A 0.035 m concentration of EMS was used to treat 2,000 seeds for 24 hours. The seeds were rinsed […]
Compact Mutations in Cucurbita pepo L. Induced by Ethyl-Methanesulfonate
Cucurbit Genetics Cooperative Report 1:34 (article 31) 1978 W. N. Whitwood and J. L. Weigle Robson Seed Farms, Hall, NY 14463 Seeds of Cucurbita pepo cv. Early prolific Straight Neck, were treated with a .035M solution of ethyl- methanesulfonate (EMS) for twenty-four hours at room temperature. The M1 plants were selfed in the field to form the M2 generation. […]
Genetic differences in Sex Expression and Response to Ethephon in Summer Squash, Cucurbita pepo L.
Cucurbit Genetics Cooperative Report 1:33 (article 30) 1978 S. Shannon and R. W. Robinson New York Agricultural Experiment Station, Geneva, NY 14456 Problems have been encountered in the commercial production of hybrid seed of summer squash when recommended rates of ethephon application were used to inhibit staminate flower production on the maternal inbred parent. The […]
Gynoecious Sex Expression in Cucurbita Resulting from an Interspecific Cross
Cucurbit Genetics Cooperative Report 1:31-32 (article 29) 1978 R. W. Robinson, M. A. Boettger, and J. W. Shail New York Agricultural Experiment Station, Geneva, NY 14456 The ‘Buttercup’ and ‘Golden Delicious’ cultivars of Cucurbita maxima were crossed with the ‘Butternut’ and ‘Waltham Butternut’ cultivars of C. moschata. Each parent was monoecious, producing many more staminate than pistillate flowers. Each […]