Cucurbit Genetics Cooperative Report 7:14-16 (article 7) 1984 D.R. Ramirez and T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 The onset of fruit development usually determines the extent of vegetative growth in crops. The length of both vegetative and reproductive phases in the growth of plants have been claimed to […]
Month: July 1984
Growth Analysis of Three Cucumber Lines Differing in Plant Habit and Yield
Cucurbit Genetics Cooperative Report 7:17-18 (article 8) 1984 D.R. Ramirez and T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 It is known that the activity of a developing fruit in a cucumber plant inhibits the development of fruit that set later (1), as well as the development of other plant […]
Early Generation Testing in Cucumber
Cucurbit Genetics Cooperative Report 7:19-20 (article 9) 1984 D.B. Rubino and T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Early generation testing would benefit cucumber breeders by allowing poor lines to be discarded early in the inbreeding process. Often, lines are self pollinated six generations before testing. That method wastes […]
Effect of Inbreeding on Horticultural Performance of Cucumber Families Developed from a Variable Population
Cucurbit Genetics Cooperative Report 7:21-22 (article 10) 1984 D.B. Rubino and T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Species of the Cucurbitaceae have been reported to exhibit little inbreeding depression (1). However, Ghaderi and Lower (3) reported that in 5 of 6 crosses of cucumber, heterozygosis had significant positive […]
Evaluation of Screening Methods and Sources of Resistance for Rhizoctonia Fruit Rot in Cucumber
Cucurbit Genetics Cooperative Report 7:23-24 (article 11) 1984 Sloane, J.T., T.C. Wehner and S.F. Jenkins, Jr. Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 B. Graves Southern Mississippi Experiment Station, Beaumont, MS 39423 Cucumber yield losses in the southern U.S. averaged 7 to 9% and reached as high as 40% in some […]
Heritability of Resistance to Rhizoctonia Fruit Rot in a Wide Base Cucumber Population
Cucurbit Genetics Cooperative Report 7:25-26 (article 12) 1984 J.T. Sloane and T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Rhizoctonia fruit rot is a major disease problem in the southern U.S., reducing yields by an average of 7 to 9% annually (3). No single-gene resistance to the disease has been […]
Electrophoretic Comparison of Six Species of Cucumis
Cucurbit Genetics Cooperative Report 7:27-30 (article 13) 1984 J.E. Staub and R.S. Kupper Department of Horticulture, University of Wisconsin, Madison, WI 53706 T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Evolutionary studies in the genus Cucumis have been conducted by Dane (2) and Esquinas-Alcazar (3) using isozymes as biochemical markers. […]
Effect of End Borders on Plot Yield of Once-over Harvested Pickling and Fresh-market Cucumbers
Cucurbit Genetics Cooperative Report 7:31-32 (article 14) 1984 T.C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Yield of pickling and fresh-market cucumbers from plots harvested once-over is an efficient measure of yield in multiple-harvest trials (Wehner and Miller, unpublished data). Smith et al. (1) found the correlation between once-over and […]
Variation for Yield within Locations in Homogeneous and Heterogeneous Cucumber Populations
Cucurbit Genetics Cooperative Report 7:33-34 (article 15) 1984 Todd C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Environmental variation is an important source of error in evaluating yield of lines in small-plot trials. Smith et al. (2) found a large effect of environment for yield (fruit number per plot) in […]
Optimum Plot Size for Once-over Harvest of Pickling and Fresh- market Cucumbers
Cucurbit Genetics Cooperative Report 7:35-36 (article 16) 1984 T.C. Wehner and W.H. Swallow North Carolina State University, Raleigh, NC 27695 An efficient method for measuring yield in cucumbers is to count the fruit number in small plots harvested once-over. This can be done with both pickling and freshmarket cucumbers, and is a useful predictor of […]