Life Sciences Commons^™

Inheritance Of Awns In A Cross Between Hard Federation And Kota Wheats, B. Ira Judd

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the past few years there have been numerous studies made of various characters in wheat. Some characters which were thought at first to be simple in inheritance have since been found to be rather complex.

The data in the following pages are the results of an investigation made to study the inheritance of awns in a cross between Hard Federation and Kota varieties of wheat.

Correlated Inheritance In Wheat Iii Federation X Iii C 18 (Dicklow X Sevier Hybrid), D. E. Heywood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several wheat characters have been shown to exhibit rather complicated inheritance. Examples are such characters as culm length, spike density, and awn classes. This paper reports a study of the inheritance and of the correlated inheritance of these and some other plant characters in a cross between a hybrid of Dicklow X Sevier (III C 18) with Federation.

A Study Of The Seasonal History Of Alfalfa Flowers As Related To Seed Production, John W. Carlson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A few researches have been concerned with the structure and pollination of alfalfa flowers. Others have considered the biological problems concerned in the pollination and fecundation of the flowers. In none of these studies, however, has an attempt been made to follow carefully the alfalfa flowers through various stages of development. Nor has any effort been made to determine what effect the condition and duration of these stages may have upon the resulting seed crop.

The work that follows is a study of the changes through which the alfalfa flowers pass during the season while functioning as organs of seed …

Correlated Inheritance In Wheat, George Stewart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

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 …

The Effect Of Alternate Freezing And Thawing On Impermeable Alfalfa And Dodder Seeds, A. R. Midgley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is surprising to know the small amount of work that has been done on alternate freezing and thawing of seeds. Many experiments, however, have been conducted to see the effect of very low temperatures on seeds and to notice the effect it had on their vitality. Some experimenters subjected seeds to temperatures as low as liquid hydrogen with very interesting results but in very few cases, if any, was the effect of alternate freezing and thawing studied.

The work that follows deals directly with the effects of alternate freezing and thawing on impermeable seeds of alfalfa and of dodder. …

Correlation Studies In Wheat, Joseph Reed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Considerable work has been done by plant breeders and investigators in the study of individual plant characters, but only a few have attempted to work out correlations between characters in crop plants. One reason for this seems to be, that many investigators have felt that correlation studies were of very little practical value. This attitude was due perhaps to the interpretation given correlation data, especially the nature of the casual agency or agencies to which the correlation was attributed. Most of our plant breeders however, have been too busy working on experiments with single characters and have given little or …

Inheritance Of Chaff Color, Head Shape, And Grain Texture In Wheat, Delmar C. Tingey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The data presented in this thesis are the results obtained from a study of the F₂ and F₃ generations from a cross between the wheat varieties, Dicklow and Hard Federation. Toward the end of the summer of 1922 this problem was assigned to me by Professor George Stewart. The plants then growing in the field were in the F₂ generation, the cross having been made in 1920 by Professor Stewart. The chief purpose of the cross was to improve the grain quality of spring-irrigated wheat by the application of Mendelian principles in such a way as to …

A Study Of Size Inheritance In Wheat, Peter Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The results presented in this paper are from data accumulated by a study of the F3 generation of a cross between the two varieties, Sevier and New Zealand wheat. This cross was made during the summer of 1920 by Professor George Stewart with the object of combining the high-yielding power of Sevier with the strong straw of New Zealand. In the fall of 1922 the problem was assigned to me, at which time I selected about 150 superior plants, possessing the desired characteristics, at least so far as appearance was concerned. Since then these plants and the F3 generation have …

The Effect Of Dry Heating On Alfalfa Seed And Adulterants, Ernest V. Staker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship of artificial heating to the germination of seeds has been a subject of more or less interest for the last 75 years. Like other research work, experimenters first had their attention called to the problem largely as the result of innate curiosity. They were interested in the result as measured by germinative power, of the application to seeds of different amounts of heat for varying periods of time, consequently many divergent and sundry experiments were carried out. Seeds of a large number of plants have been subjected to tests and the results recorded. The investigations include the effect …

Inheritance Studies In Kanred X Martin And In G-149 X Ridit, Myron T. Hansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The studies here reported involve two crosses, one of which was between a pure line of Kanred and a pure line of Martin from a bunt resistant selection. The other was between a pure line of G-149, a rust-resistant segregate from Sevier x Dicklow, and a pure line of Ridit. These were both economic breeding projects made in an effort to combine the good commercial qualities of Kanred and G-149 with the high bunt resistance of Martin and Ridit, respectively.

These crosses also furnished, as a by-product, some good genetic data, as in each cross one parent was fully awned …

Qualitative Mendelian Inheritance In Wheat Hybrids, Aaron F. Bracken

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two methods of crop improvement are open to the plant breeder. Pure-line selection, which might be mentioned first, deals with the natural variability in plant populations. Thru selection, isolation, and comparative yield tests superior individuals are located. Nothing, however, can be added which the plant does not already have. Here hybridization provides a new starting point. Increased variation, new combination of characters, and thus greater opportunities are provided for improvement. The present investigation has for its purpose a study of the latter phase of this subject.

In certain parts of Utah the straw from dry-land wheat is used for feeding …

A Contribution To Our Knowledge Of The Aphididae Of Utah, George Knowlton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There are many groups of insects in Utah that have not been touched in a systematic way up to the present time, and to the knowledge of the author no systematic work has been done on the homopterous family Aphididae.

Due to the very common occurrence of the aphids, or plant lice, and the need for a simple key that would aid in the determination of these insects, this work was commenced in June 1923, continuous work being carried on in collecting, determining, drawing and describing, up to the present time.

Hybridization Of Wheat, Floyd M. Beach

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to set forth the purpose of wheat hybridization. To do this properly it is necessary to know the history of hybridization of plants. Also to know some of the workers in this field and the hybrids produced by them. In the work at the Experiment Stations the various experimenters have discovered many interesting facts which it is necessary to know and understand. To thoroughly comprehend the work it is also necessary to do the actual processes of the work and to carry the hybrid through several generations and eventually to the goal for which …

Mendelian Inheritance In Wheat Hybrids, J. Leo Mortensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Until the beginning of the present centry the general opinion was that Egypt and Mesopotamia were the earliest homes of cultivated plants. Recent translations of the old Chinese records, however, reveal the fact that many of our cultivated plants were grown by the ancient peoples of China prior to the time of the Egyptians.

Dettweiler (11) (1914) writes: "Today it is admitted--except by a few--that the original home of the primitive European population, the Indo-Germans, is not Asia but northern Europe, that they developed their culture there in the late stone age, and that they then dispersed in their wanderings …

Effect Of Root-Rot Upon Sugar-Beet Seed Production, Louis F. Nuffer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Due to considerable loss through root-rot of mother beets while in storage during the winter of 1918-1919 the Amalgamated Sugar Company asked advice in regard to planting beets which had decay lesions on them. Would the beets yield seed if planted? How much seed would these beets yield as compared with healthy beets? Would the seed produced be injured by having been grown on decayed beets? It was felt that an experiment carried out with the above questions in view would bring out many facts upon which to base conclusions in answering the questions of the Sugar Company.