Agronomy and Crop Sciences Commons^™

The Unexpected Occurrence Of Aleurone Colors In F2 Of A Cross Between Non-Colored Varieties Of Maize, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Before the Mendelian methods of analysis became available, considerable wonder would doubtless have been excited by the "mysterious" appearance in F₂ of one colored grain-purple or red-to every five or six white ones in case of a maize cross, both parents and F, of which had only white grains. An occurrence of this sort has recently been noted in one of my maize cultures and the F2 numbers are explained here as a trihybrid or tetrahybrid ratio. The crosses in question were made primarily for a study of size inheritance and fairly large numbers have been grown. The varieties …

Discussion And Correspondence Coupling Vs. Random Segregation, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

To the editor of science: The suggestion offered by Morgan, in SCIENCE of September 22, to account for the coupling and repulsion of factors for various characters in inheritance in such forms as Abraxas, Drosophila, fowls, sweet peas, etc., incites this note.

Briefly Morgan's hypothesis is (1) that the materials representing factors that couple are "near together in a linear series" in the chromosomes; (2) that, when pairs of parental chromosomes conjugate, "like regions stand opposed "; (3) that "homologous chromosomes twist around each other," but that the separation of chromosomes is in a single "plane"; (4) that, thereby the …

The Inheritance Of Sizes And Shapes In Plants, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Some years ago Lock reported a cross of a tall race of maize with a shorter race which produced an intermediate height in F₁ and exhibited no segregation in F₂ when crossed back with one of the parents. Castle's results with rabbits are very similar to those of Lock with maize. Castle summarizes his results in part as follows:

A cross between rabbits differing in ear-length produces offspring with ears of intermediate length, varying about the mean of the parental ear-lengths. . . . A study of the offspring of the primary cross-breds shows the blend of the …

Irrigation Farming: A Handbook For The Proper Application Of Water In The Production Of Crops, Lucius M. Wilcox

University of Nebraska-Lincoln Extension: Historical Materials

A handbook for the application of water in the production of crops.

The Effect Of Certain Methods Of Soil Treatment Upon The Corn Crop, T. L. Lyon

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The effect of certain methods of soil treatment upon the corn crop in Nebraska.

The Rainfall Of Nebraska, G. D. Swezey, George A. Loveland

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Covers the rainfall in Nebraska with respect to farming.

Includes:

Character of the precipitation

Amount of precipitation

Rainfall of the growing season

Number of rainy days

Variability of rainfall

Progressive changes in the rainfall

Monthly precipitation of all stations and locations in Nebraska from the earliest years to 1895

Average precipitation for Nebraska from the earliest years through 1895

Charts of normal precipitation--weekly, monthly, and annual

Experiments In The Culture Of The Sugar Beet In Nebraska, H. H. Nicholson, T. L. Lyon

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Experiments in the culture of the sugar beet in Nebraska in 1894 and 1895.

The Conservation Of Soil Moisture By Means Of Subsoil Plowing, T. L. Lyon

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Covers the conservation of soil moisture by means of subsoil plowing.