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Thesis (M.S.)--University of Nebraska--Lincoln, 1960. Department of Agronomy.


Copyright 1960, the author. Used by permission.


Two groups of lines previously selected for general and specific combining ability were compared in crosses with four single-cross testers which constitute a sample of those which might be used in a breeding program in the corn belt. Estimation of the pertinent variance components resulting from subdivisions of the main sources of variation were calculated from the analysis of variance and approximate confidence limits were calculated for these components. The way in which individual testers ranked the lines were studied through calculation of correlation coefficients.

The observed results were not entirely in accordance with expectancy, and suggest that additional information is necessary through repetition of the material in time and space to obtain more conclusive answers to the objectives of this investigation.

Advisor: John H. Lonnquist.