Date of Award:

5-1926

Document Type:

Thesis

Degree Name:

Doctor of Philosophy (PhD)

Department:

Plants, Soils, and Climate

Committee Chair(s)

H. K. Hayes

Committee

H. K. Hayes

Committee

E. C. Stakman

Committee

M. N. Levine

Committee

Olaf S. Aamodt

Abstract

Since the rediscovery of Mendel's law in 1900, there have been many studies of inheritance in wheat. Of these rather numerous investigations, however, only a few have consisted of correlated studies of various characters on the same plant.

Inheritance of awns and of spike density have received some attention but the studies have hardly more than indicated the problem. Both have been thought by some to be rather simple in their inheritance, and in some crosses without doubt such is the case, but lately there has come a recognition of considerable complexity.

Density. As here used, "density" refers to compactness of the spike. Compact spikes have short rachis internodes and the spikelets are close together. Such a spike is to be "dense", whereas one with long rachis internodes with the spikelets far apart is said to be "lax."

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