Radiation genetics and radiation resistance in peanuts. Final report, June 1954 - October 31, 1972

Author: Gregory, W. C.
Published: United States : [publisher not identified], 1972
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1972
Physical Description: microfiche : negative ; 11 x 15 cm
Additional Creators: Emery, D. A.

Availability

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Summary

The final progress report for Contract AT-(40-1)-1747, Radiation Genetics and Radiation Resistance in Peanuts, summarizes the objectives, procedures and significant results involving five major and two supporting investigations conducted from 1954-1972 at North Carolina State University. The major experiments included studies of (a) The Comparative Effects of Radiation Upon Genetic Variability and Progress from Selection in Different Genotypes and Hybrids; (b) The Selection for Radioresistance; (c) The Breeding Value of the Macromutant; (d) The Use of Irradiation in The Breeding Cycle of Self-Pollinated Plants and, (e) A Mutation Breeding Model. Supporting investigations were of the effects of low dosage irradiation and dormant seed moisture on seedling response. All of the research pertained to the application of irradiation and the resulting mutants to the improvement of cultivated plants through breeding. While the results from specific experiments conducted with limited germplasm in particular growing seasons cannot be generalized, certain broad conclusions may be reached. In all experiments the use of irradiation increased genetic variability in certain quantitative traits but the increases in variance were usually associated with decreased means unless selection was practiced. Selection for radioresistance seemed to be effective to a point where accumulated radiation damage caused a shift to increased sensitivity. The use of macromutants with known genetic backgrounds may be one means of increasing selection potential for specific traits among the segregates. Bulk hybrid populations combined with irradiation to increase mutations and outcrossing could serve as continuing sources of new germplasm; irradiation applied to parents prior to hybridization gave greater selection potential for yield than post-hybrid treatments.

Report Numbers

ORO-1747-20

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: AT(40-1)-1747
NSA number: NSA-27-017558
OSTI Identifier 4596615
Research organization: North Carolina State Univ., Raleigh, NC (United States).

Funding Information

Sponsored by US Atomic Energy Commission (AEC).

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