Date of Award:

5-1959

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Plants, Soils, and Climate

Department name when degree awarded

Agronomy

Committee Chair(s)

DeVere R. McAllister

Committee

DeVere R. McAllister

Committee

Rollo W. Woodward

Abstract

Barley, during the past three decades, has been used considerably for the study of linkage groups and character inheritance. The commercial varieties are diploids, having seven pairs of chromosomes. Six linkage groups have been established. According to studies on interchange by Kramer et al. (1954), two linkage groups, formerly designated as III and VII, may be separate arms of the same chromosome. They are now generally considered as one linkage group.

Though more than two hundred characters have been investigated, less than sixty have been assigned relative positions on genetic maps. In many cases, selection for good characters is difficult and time consuming; however, a knowledge of linkages between desirable characters can greatly facilitate the work of the plant breeder.

The objectives of this study have been to determine new linkages, investigate several reported ones, and to further an understanding of the inheritance of unit characters in barley. Of the 19 factor pairs selected for this study, four have not been previously assigned to linkage groups.

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