Cucurbit Genetics Cooperative Report 5:8-9 (article 4) 1982 M. D. Edwards and R. L. Lower University of Wisconsin, Madison, WI 53706 Seed quality is a major limitation to utilization of the compact plant-type in cucumbers (1). Alterations in seed weight and shape are associated with poor emergence and are apparently pleiotropic effects of the gene […]
Month: July 1982
Comparative Yields of Compact and Vining Plant Type Isolates in Cucumber at Four Densities
Cucurbit Genetics Cooperative Report 5:6-7 (article 3) 1982 M. D. Edwards and R. L. Lower University of Wisconsin, Madison, WI 53706 The compact plant type of cucumbers has been suggested as an alternative to the standard vining phenotype for use in high density plantings (3). Although the plant architecture appears adapted for efficient utilization of […]
Inheritance of Short-day response to Flowering in Crosses Between a Cucumis sativus var. hardwickii (R.) Alef. Line and Cucumis sativus L. Lines
Cucurbit Genetics Cooperative Report 5:4-5 (article 2) 1982 P. T. Della Vecchia, C. E. Peterson and J. E. Staub University of Wisconsin, Madison, WI 53706 Cucumis sativus var. hardwickii (R.) Alef. has been suggested as a possible source of germplasm for increasing yield in pickling cucumbers (1). Potentially the most useful characteristic of ‘hardwickii’ types is their ability to […]
Effect of the Duration of Short-day Treatment on the Flowering Response of a Cucumis sativus var. hardwickii (R.) Alef. Line
Cucurbit Genetics Cooperative Report 5:2-3 (article 1) 1982 P. T. Della Vecchia, C. E. Peterson, and J. E. Staub University of Wisconsin, Madison, WI 53706 Since Horst and Lower (1) first reported on the potential of Cucumis sativus var. hardwickii (R.) Alef. as a possible source of germplasm for increasing yield in pickling cucumbers, there has been considerable interest by […]
Linkage of Sex Type, Growth Habit and Fruit Length in Two Cucumber Inbred Backcross Populations
Cucurbit Genetics Cooperative Report 5:12-13 (article 6) 1982 K. W. Owens and C. E. Peterson University of Wisconsin, Madison, WI 53706 Two inbred backcross populations (2) were developed by crossing W1540, a small-fruited, gynoecious, determinate USDA breeding line with W1925 (Population I) and W1928 (Population II), both of which were large-fruited, monoecious and indeterminate. Two […]
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 […]
Comparison of the Effectiveness of BA and AVG in Promoting Fruit Set in Muskmelon
Cucurbit Genetics Cooperative Report 5:23 (article 11) 1982 J. B. Loy University of New Hampshire, Durham, NH 03824 The cytokinin N6 – benzyladenine (BA) promotes fruit set in hand-pollinated muskmelon (1). In making our muskmelon pollinations during the summer, we routinely apply 2 µg BA in a lanolin-water paste (7:3 w/v) to the base of ovaries […]