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Linda Wessel-Beaver and Ann Marie Thro

Oral Session 18—Vegetable Breeding 29 July 2006, 8:00–9:15 a.m. Nottoway Moderator: Linda Wessel-Beaver

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Katharina S. Wigg and Irwin L. Goldman

options for controlling this fungus in table beet production, and no reports of efforts to improve host plant resistance through breeding. R. solani is a soilborne necrotrophic pathogen affecting many crop families. Within the Rhizoctonia complex, 12

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James F. Hancock and Charles Stuber

A landmark workshop was held at North Carolina State University in Feb. 2007 to develop a national plant breeding coordinating committee and discuss the critical role that plant breeders play in the security of our nation's food and fiber

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Fredrick A. Bliss

Fruits and vegetables are rich sources of the micro mineral elements and vitamins often lacking in diets based on cereals, grain legumes, and starchy roots and tubers, but void of animal products. When embarking on a breeding program to improve nutritional compounds, the way the fruit or vegetable is consumed in mixed diets must be considered. To alleviate nutritional problems, the nutrients must not only be present in the plant parts consumed, but also absorbed efficiently in the body. In some cases, it may be necessary to modify compounds to improve absorption as well as increase the concentration. Breeding to improve nutritionally related traits can be approached in a manner similar to that for other traits; i.e., identification of genetic variability, selection for enhanced levels using either individual phenotype or family mean values, and testing for field performance. In addition to improving amount and availability, avoidance of undesirable correlated responses due to genetic or physiological linkages between the trait of interest and other traits deleterious to either plant growth or the consumer is critically important during selection. The growing number of molecular marker-based linkage maps should prove especially useful for identifying genes of interest and employing marker-aided selection. When insufficient variability for amount or type of compound is present in the gene pool, strategies using transgenic plants may be useful.

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Aline Coelho Frasca, Monica Ozores-Hampton, John Scott, and Eugene McAvoy

= 0.004). At 90 DAT, no differences among CGH and ‘FL 47’ were found and V averaged 216.6 dm 3 . Table 2. Plant volume at 30, 60, and 90 d after transplanting (DAT) for compact growth habit tomato breeding lines (BLs) grown during Spring 2013 and 2014

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J.M. Vogel, A. Rafalski, M. Morgante, G. Taramino, W. Powell, M. Hanafey, and S.V. Tingey

DNA-based diagnostics are now well-established as a means to assay diversity at the locus, chromosome, and whole-genome levels. As technology has advanced, DNA sequence-based assays have become easier to use, more efficient at screening for nucleotide sequence-based polymorphisms, and available to a wider cross-section of the research community. A review of the use of molecular markers in several different areas of genetics and plant breeding will be presented, as well as a discussion about their advantages and limitations. Recent advances in several areas of technology development and laboratory automation will also be presented, including a summary of direct comparison of different DNA marker systems against a common set of soybean cultivars.

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organized by the Michigan State University Plant Breeding and Genetics Group held at Michigan State University, East Lansing 9–11 March 2005

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held at the 91st ASHS Annual Meeting Corvallis, Ore. 8 Aug. 1994 sponsored by the Vegetable Breeding Working Group Genetics and Germplasm Working Group Fruit Breeding Working Group Ornamental Plant Breeding Working Group published by the American

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David Byrne

Oral Session 14—Fruit Breeding 28 July 2006, 4:15–5:15 p.m. Bayside A Moderator: David Byrne

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Margaret R. Pooler

The U.S. National Arboretum has released over 650 new plant cultivars since it was established in 1927. A key to the success of the plant breeding program has been the voluntary participation of universities and private nurseries in evaluating and propagating new plant material. The cooperative evaluation and stock increase programs play a critical role in the successful testing, introduction, and distribution of new cultivars of landscape trees and shrubs. These integrated cooperative programs depend on the involvement of nurserymen, researchers, botanic gardens, or individuals to evaluate potential new cultivars under diverse climatic conditions and hardiness zones, and wholesale propagation nurseries to increase stock of those cultivars destined for release.