Date of Award:


Document Type:


Degree Name:

Master of Science (MS)


Plants, Soils, and Climate

Department name when degree awarded

Plant Breeding

Committee Chair(s)

R. W. Woodard


R. W. Woodard


The development of new and better varieties of plants through plant breeding is essential to meet certain needs of a changing world. Genetics and a knowledge of its principles are the basis for such improvement.

Barley has been used rather extensively in linkage relations studies. Its desirable characteristics are: (1) interspecific fertility and relative ease of hybridization, (2) numerous characters that are easily differentiated, (3) its commercial importance as a crop and (4) there are seven chromosome pairs in each of the four cultivated species.

More than one hundred characters in barley have been investigated. Seven linkage groups in which two or more characters have been located are reported (Robertson 1939). The leading barley breeders now are suggesting that only six chromosomes are involved.

When a large number of genes are properly located in their respective linkage groups, barley improvement will undoubtedly be accelerated.

This study is an effort to determine the location of genes already reported in linkage group IV and to establish new linkages if possible. A study of the inheritance of some genes, as yet not placed in any of the seven linkage groups has also been made.