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Thesis (M.S.)--University of Nebraska--Lincoln, 1958. Department of Agronomy.


Copyright 1958, the author. Used by permission.


In order to increase the effectiveness of a breeding program planned to develop agronomically desirable varieties of switchgrass (Panicum virgatum L.), a population consisting of numerous endemic strains collected throughout Nebraska was studied in order to gain information on the amount and nature of variation present.

Comparisons among endemic strains and among selected clones within strains demonstrated that large phenotypic variations were present for all characters studied. Heritablility studies based on variance components and parent-progeny regressions further indicated that a large proportion of this total variation was due to genetic differences although heritabilities appeared to be somewhat different for various characters.

Results of this study indicate that initial selection among endemic strains followed by selection within the more desirable strains should be effective in developing agronomically desirable varieties of switchgrass from the breeding material evaluated.

Advisor: Laurence C. Newell.