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Full-Text Articles in Life Sciences

Alfalfa Breeding, H. M. Tysdal, T. A. Kiesselbach, H. M. Westover Jun 1942

Alfalfa Breeding, H. M. Tysdal, T. A. Kiesselbach, H. M. Westover

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Interest in the principles of alfalfa breeding has increased greatly with the growing "forage consciousness" of the country at large and the more specific interest developed through cooperation in the Alfalfa Improvement Conference. As is true of many other forage crops, information on the breeding behavior of alfalfa is meager. During the past few years, however, the genetics and principles of reproduction of this crop have come to be better understood and it is the purpose of this paper to bring together the available information pertaining to the improvement of alfalfa and to add certain suggestions with respect to future …


Wilt And Cold Resistance Of Self-Fertilized Lines Of Alfalfas, George L. Peltier, H. M. Tysdal Sep 1934

Wilt And Cold Resistance Of Self-Fertilized Lines Of Alfalfas, George L. Peltier, H. M. Tysdal

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The relative reactions to cold and wilt of self-fertilized lines of alfalfa through to the fifth generation are reported. Some of the reasons for undertaking a breeding program are given as well as methods used in the controlled cold and wilt determinations. Preliminary studies showed that reinoculating healthy individuals which had already resisted one wilt infection test served to eliminate additional plants, but the percentage healthy was much higher after the reinoculation than after the first inoculation. The foundation materials from which selections were made consisted of selected plants from a number of old Nebraska fields and a large collection …


The Immediate Effect Of Gametic Relationship And Of Parental Type Upon The Kernel Weight Of Corn, T. A. Kiesselbach Dec 1926

The Immediate Effect Of Gametic Relationship And Of Parental Type Upon The Kernel Weight Of Corn, T. A. Kiesselbach

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

This investigation to determine the relation of the kernel weight of corn to the source of pollen with which it was fertilized has been made to answer several questions of both practical and technical interest: (1) To what extent is kernel weight affected in the current crop by the "breadth of breeding" or the gametic relationship? (2) What is the relation of the diversity of parental type to the immediate effect of foreign pollen upon the kernel weight of corn? (3) Is the immediate effect of cross-fertilization upon the kernel weight of sufficient importance to justify the annual mixing of …


Winter Wheat Investigations, T. A. Kiesselbach Nov 1925

Winter Wheat Investigations, T. A. Kiesselbach

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Twenty years of wheat breeding, consisting chiefly of the isolation and testing of pure lines, has now been conducted at the Nebraska Agricultural Experiment Station. It is the purpose of this paper to report the conduct and results of this work. The resulting strains are compared with the best other wheats available from Nebraska and other sources. The effects of a number of cultural practices related to the preparation of seed, seeding, treatment of the growing crop, and harvesting are also presented. Some consideration is given to the experimental technique of the comparative tests.


Corn Investigations, T. A. Kiesselbach Jun 1922

Corn Investigations, T. A. Kiesselbach

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The purpose of the investigations reported in this bulletin has been primarily to determine some of the underlying principles involved in corn improvement. The work comprises a study of some of the physiological characteristics of the crop together with a comparison of various selection, breeding, and cultural practices in their relation to grain yield.


A Genetic Study Of Plant Height In Phaseolus Vulgaris, R. A. Emerson Mar 1916

A Genetic Study Of Plant Height In Phaseolus Vulgaris, R. A. Emerson

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

When pole and bush beans are crossed, 3:1 segregation results whether the pole bean is very tall or only medium in height and whether the bush bean is very short or relatively tall. To determine the interrelation of these two types of behavior by an analysis of the factors concerned in height of plants in beans and by a study of their mode of inheritance was the object of the investigations reported here.


The Inheritance Of A Recurring Somatic Variation In Variegated Ears Of Maize, R. A. Emerson Feb 1914

The Inheritance Of A Recurring Somatic Variation In Variegated Ears Of Maize, R. A. Emerson

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The inheritance of variegation has special interest and importance in genetics. In this paper I shall present data from maize and attempt to show how they can be interpreted in strictly Mendelian terms.


The Inheritance Of Quantitative Characters In Maize, R. A. Emerson, E. M. East Apr 1913

The Inheritance Of Quantitative Characters In Maize, R. A. Emerson, E. M. East

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The experiments conducted by one of the writers were begun at the Connecticut Agricultural Experiment Station at New Haven in 1906 and removed to the Bussey Institution of Harvard University at Forest Hills, Massachusetts, in 1909. The materials employed in this study consisted principally of crosses of Tom Thumb pop with Black Mexican sweet and of Watson flint with Leaming dent. The number of rows per ear were noted in several other crosses, the parents of which are listed later in this paper. The experiments of the other writer were begun at the Nebraska Agricultural Experiment Station at Lincoln in …