Cucurbit Genetics Cooperative Report 5:10-11 (article 5) 1982 Robert D. Locy and Todd C. Wehner North Carolina State University, Raleigh, NC 27650 Previous research (2) indicated that cotyledon explants formed adventitious shoots in culture whereas hypocotyl explants did not. A possible explanation for that is that hypocotyl explants must rely primarily on nitrogen supplied from […]
Todd C. Wehner
Correlation of Single-plant Yield with Multiple-harvest yield in Pickling Cucumber
Cucurbit Genetics Cooperative Report 5:14-15 (article 7) 1982 Todd C. Wehner North Carolina State University, Raleigh, NC 27650 There are 2 basic methods for evaluating breeding material for yield: selection based on single plants, and selection based on rows (usually progeny of single plants). Single-plant selection permits the evaluation of more genotypes with a given […]
Genetic Variation for Low-Temperature Germination Ability in Cucumber
Cucurbit Genetics Cooperative Report 5:16-17 (article 8) 1982 Todd C. Wehner North Carolina State University, Raleigh, NC 27650 Low-temperature germination ability in cucumber varieties may be useful in establishing earlier and more uniform stands for spring plantings. Previous research showed that there were differences in germination speed at temperature below 17°C (1). Also % germination […]
Weighted Selection Indices for Trials and Segregating Populations
Cucurbit Genetics Cooperative Report 5:18-20 (article 9) 1982 Todd C. Wehner North Carolina State University, Raleigh, NC 27650 A selection index (SI) can be of great help in guiding the decisions of plant breeders by summarizing several variables into just one number. With the wide availability of computers for data analysis, it is now fairly […]
Correlation of Multiple-harvest Yield with Once-over Yield in Small Plots for Fresh-market Cucumbers
Cucurbit Genetics Cooperative Report 5:20-21 (article 10) 1982 Todd C. Wehner and Conrad H. Miller North Carolina State University, Raleigh, NC 27650 Probably the most accurate method of measuring yield of fresh-market cucumber lines is through a multiple-harvest trial with large replicated plots. However, in a breeding program, it is usually necessary to evaluate more […]
Tissue Culture Propagation of Field-Grown Cucumber Selections
Cucurbit Genetics Cooperative Report 4:20-22 (article 10) 1981 T. C. Wehner and R. D. Locy North Carolina State University, Raleigh, NC 27650 One potential application of tissue culture techniques to cucumber breeding is in the propagation of selections made in the field. This would replace vegetative propagation by rooted cuttings (4). Callus has been induced […]
1980 Stocks and Germplasm desired or for Exchange
Cucurbit Genetics Cooperative Report 3:80-81 (article 39) 1980 Stocks Desired T. C. Wehner Chlorophyll deficient stocks of Cucumis sativus, including lines with any of the following genes: cd, g, gc, ls, pl, v, vvi, yc-1, yc-2, and yp. Stocks for Exchange G. W. Bohn, A. N. Kishaba, and J. D. McCreight Cantaloupe breeding line WMR 29 is a high quality watermelon mosaic virus (WMV) 1-resistant cantaloupe […]