Cucurbit Genetics Cooperative Report 9:5-9 (article 2) 1986 Ineke Booy and Todd C. Wehner Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609 Samuel F. Jenkins, Jr. Department of Plant Pathology, North Carolina State University, Raleigh, NC 27695-7616 This research was supported by a grant from Vlasic Foods, Inc. The soil-borne pathogen Rhizoctonia […]
Todd C. Wehner
Optimum Heat Unit Summation Technique for Harvest Prediction of Fresh-Market and Pickling Cucumbers in North Carolina
Cucurbit Genetics Cooperative Report 8:9-11 (Article 4) 1985 Perry, Katharine B. and Todd C. Wehner Department of Horticultural Science, North Carolina State University Raleigh, NC 27695-7609 Heat unit summation techniques have found widespread applicability for predicting stages of development for many horticultural and agronomic crops (3). Boswell (2) first documented the concept of heat summations […]
Estimates of genetic variances and covariances of three fresh-market cucumber populations.
Cucurbit Genetics Cooperative Report 8:26-28 (Article 10) 1985 Strefeler, Mark S. and Todd C. Wehner Department of Horticultural Science, North Carolina State University Raleigh, NC 27695-7609 An effective plant breeding program depends on the existence of genetic variability, and the estimation of genetic variance and gene effects are vital in formulating the most effective breeding […]
A Standard System for Making Comments While Collecting Data in a Cucumber Evaluation Program
Cucurbit Genetics Cooperative Report 8:31-32 (Article 12) 1985 Wehner, Todd C. Department of Horticultural Science, North Carolina State University Raleigh, NC 27695-7609 In the North Carolina State University cucumber breeding program, numerous hybrids, lines and families are evaluated each year in field trials. Most of the data collected is numeric, involving measurement of yield, earliness, […]
Effect of Length of Vegetative Phase on Total Dry Matter Production and Its Partitioning
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 […]
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 […]