Date of Award:

5-1949

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Plants, Soils, and Climate

Committee Chair(s)

R. W. Woodward

Committee

R. W. Woodward

Abstract

Barley (Hordrium sp.) is the most important spring sown cereal crop in Utah, both in acreage and in yield of total digestible nutrients per unit area. It also rates high as a feed crop in the United States. For this reason it is important that varieties are available which are high in yield, high in quality, and disease resistant, along with other desirable characteristics. In order to work toward this end most efficiently, it is first necessary that the genetics of the barley plant be worked out.

Barley offers the plant breeders and geneticists a valuable material to use in the study of genetics. The fact that it has many easily distinguishable characters, that it is easy to grow large F2 populations, and that it has a low chromosome number make it desirable for this type of study. That all interspecific crosses are fertile make it all the more desirable for the plant breeder.

This study is a by-product of the cereal breeding and improvement program being carried on at the Utah Experiment Station.

Recently the study of translocations induced by X0rays and other means has gained wide interests among plant breeders, geneticists, and cytologists alike. Translocations or interchanges consist of the exchange of segments of non-homologous chromosomes. As a result semisterility occurs in plants which are heterozygous for the interchange.

the objective of this study is to calculate any linkage which may be found in different crosses involving translocated stocks in barley in order to determine which linkage groups are involved in the translocation; and to note any characters now linked as a result of a translocation which were not linked in normal barley stocks. The ratios and interactions which occur in any of the characters found in this study will be calculated.

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720742a63f204c3720816384c9ad78ab

Comments

Barley (Hordrium sp.) is the most important spring sown cereal crop in Utah, both in acreage and in yield of total digestible nutrients per unit area. It also rates high as a feed crop in the United States. For this reason it is important that varieties are available which are high in yield, high in quality, and disease resistant, along with other desirable characteristics. In order to work toward this end most efficiently, it is first necessary that the genetics of the barley plant be worked out.

Barley offers the plant breeders and geneticists a valuable material to use in the study of genetics. The fact that it has many easily distinguishable characters, that it is easy to grow large F2 populations, and that it has a low chromosome number make it desirable for this type of study. That all interspecific crosses are fertile make it all the more desirable for the plant breeder.

This study is a by-product of the cereal breeding and improvement program being carried on at the Utah Experiment Station.

Recently the study of translocations induced by X0rays and other means has gained wide interests among plant breeders, geneticists, and cytologists alike. Translocations or interchanges consist of the exchange of segments of non-homologous chromosomes. As a result semisterility occurs in plants which are heterozygous for the interchange.

the objective of this study is to calculate any linkage which may be found in different crosses involving translocated stocks in barley in order to determine which linkage groups are involved in the translocation; and to note any characters now linked as a result of a translocation which were not linked in normal barley stocks. The ratios and interactions which occur in any of the characters found in this study will be calculated.

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