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


Copyright 1960, the author. Used by permission.


Intra-variety sibcrosses were made in Lancaster, an open-pollinated variety of corn adapted to the corn belt area.Estimates of additive genetic and dominance variance were calculated utilizing appropriate variance components from the analyses of variance.

Nursery planting techniques as a means of overcoming negative estimates of dominance variance met with little success.Negative estimates of dominance variance were obtained with several exceptions, although the magnitude was reduced from that of a previous study.For all characters measured, estimates of additive genetic variance exceeded estimates of dominance variance.

Estimates of additive genetic variance seem to be of sufficient magnitude that intra-variety selection should be effective in improving a character such as yield.

Advisor: Charles O. Gardner