Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Tommy E. Thompson is active.

Publication


Featured researches published by Tommy E. Thompson.


Field Crops Research | 1981

Wild Helianthus as a genetic resource

Tommy E. Thompson; D.C. Zimmerman; C.E. Rogers

Abstract An extensive effort was made during 1976 and 1977 to collect and catalogue all species and subspecies of North American Helianthus . Seed or live plant material of all species and all subspecies except two were collected and are being maintained at Bushland. Seed oil percentages and fatty acid composition data are reported for the first time for 23 species. Achene (seed) oil content ranged form less than 20 to 40.2% for the 28 species (305 collections) evaluated. It appears that H. niveus (Benth.) Brandegee and H. salicifolius A. Dietr. are potential sources of genetic variability to increase oil percentage of cultivated sunflower. Much variability in fatty acid composition was also observed. Based upon our collection efforts, we now believe that H. nuttallii ssp. parishii (A. Gray) Heiser is probably extinct. Also, H. exilis A. Gray, and H. paradoxus Heiser are considered to be endangered species and H.× multiflorus L. (a natual hybrid) apparently exist only under artificial cultivation. H. debilis spp. vestitus (E.E. Wats.) Heiser, H. deserticola Heiser, H. anomalus Blake, H. schweinitzii T. and G., and H. smithii Heiser are considered to be rare species. Morphology, habitat diversity, and cross-compatibility of the different species are discussed as they relate to commercial sunflower cultivar improvement.


Journal of the American Oil Chemists' Society | 1993

Proton magnetic resonance imaging of lipid in pecan embryos

John M. Halloin; Thomas G. Cooper; E. James Potchen; Tommy E. Thompson

Magnetic resonance images of plant tissues typically are manifestations of water protons in tissues. Within oilseeds, however, lipids contain a major portion of the mobile protons, which should enable specific imaging of lipids. In this study, experiments were done to demonstrate spin-echo imaging (SEI) and chemical-shift imaging (CSI) of lipid within nonimbibed and imbibed embryos of pecan (Carya illinoensis), a high-lipid seed. Magnetic resonance spectra of airdry embryos contained a single major peak for lipid, whereas those of imbibed embryos contained separate peaks for water and lipid. This separation of spectral peaks enabled CSI of distributions of either lipids or water in imbibed embryos. A longer spin-spin relaxation time of lipid protons than of water protons in imbibed embryos allowed selective SEI of lipids in those embryos. SEI of normal, dry embryos revealed fairly uniform distribution of lipids across tissues. Similar images of embryos damaged by the fungusPhoma exocarpina or the insectZerara viridula were less intense than those of a normal embryo, reflecting the lower oil contents of the damaged embryos. Magnetic resonance imaging should provide a useful technology for studying lipid distribution and metabolism within oil seeds.


Journal of the American Oil Chemists' Society | 1980

Sunflower oil quality and quantity as affected by rhizopus head rot

Tommy E. Thompson; C.E. Rogers; D. C. Zimmerman

Sunflower seed (Helianthus annus L.) from plants infected with head rot caused byRhizopus spp. exhibited serious oil quality problems. Free fatty acid content of this oil was 19.4%, compared with 0.8% for oil from seed of healthy plants. Oil from diseased seed was also higher in palmitic, stearic, arachidic, behenic and lignoceric fatty acids. In addition, diseased plants yielded only 81% as much seed and only 55% as much oil.


Journal of The American Society for Horticultural Science | 1993

Heritability and Phenotypic Correlations of Six Pecan Nut Characteristics

Tommy E. Thompson; J.F. Baker


Journal of The American Society for Horticultural Science | 2003

Developing Microsatellite DNA Markers in Pecan

L.J. Grauke; Muhammad J. Iqbal; Avutu S. Reddy; Tommy E. Thompson


Hortscience | 1995

Evaluation of Pecan (Carya illinoinensis (Wangenh.) K. Koch) Germplasm Collections and Designation of a Core Subset

L.J. Grauke; Tommy E. Thompson; Robert D. Marquard


Journal of The American Society for Horticultural Science | 1996

Pecan Kernel Color: Standards Using the Munsell Color Notation System

Tommy E. Thompson; L.J. Grauke; E.F. Young


Journal of The American Society for Horticultural Science | 1995

Identifying Pecan Cultivars by Isozymes and Inheritance of Leucine Aminopeptidase

Robert D. Marquard; L.J. Grauke; Tommy E. Thompson; Ruth S. Janos


Hortscience | 1993

Lipid Content and Fatty Acids of Pecan Pollen

Tommy E. Thompson; Samuel D. Senter; L.J. Grauke


Acta Horticulturae | 2003

ROOTSTOCK DEVELOPMENT IN TEMPERATE NUT CROPS

L.J. Grauke; Tommy E. Thompson

Collaboration


Dive into the Tommy E. Thompson's collaboration.

Top Co-Authors

Avatar

L.J. Grauke

Agricultural Research Service

View shared research outputs
Top Co-Authors

Avatar

C.E. Rogers

United States Department of Agriculture

View shared research outputs
Top Co-Authors

Avatar

D. C. Zimmerman

North Dakota State University

View shared research outputs
Top Co-Authors

Avatar

D.C. Zimmerman

United States Department of Agriculture

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

John M. Halloin

Michigan State University

View shared research outputs
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge