Plant Breeding and Genetics Commons^™

The Effects Of Irradiating Dormant Maize Seeds With Xrays And Thermal Neutrons, Rosalind Morris, E. F. Frolik

Nebraska Agricultural Experiment Station: Historical Research Bulletins

In 1951 a research program was started at the University of Nebraska to compare the developmental effects of thermal neutrons and X rays on different crop seeds. Three crops, barley, tomato and maize, were chosen for additional information involving induced chromosomal aberrations and seedling mutations. The maize investigations are presented in this bulletin, along with a comparison among the three crops with respect to irradiation effects.

The Performance Of Alfalfa Synthetics In The First And Advanced Generations, W. R. Kehr, H. O. Graumann, C. C. Lowe, C. O. Gardner

Nebraska Agricultural Experiment Station: Historical Research Bulletins

During alfalfa breeding investigations conducted at the Nebraska Agricultural Experiment Station, numerous superior clones were selected and tested as clones, and in polycross progeny tests. Information was needed on the performance of synthetic varieties in the first and advanced generations, on the optimum number of clones to include in a synthetic variety, and on parent-progeny relationships. Clones with high general combining ability for forage yield as measured by polycross progeny tests, and in certain instances specific combining ability based on single-cross tests, were intercrossed in various ways to produce synthetic varieties. A group of synthetics varying in number of parents …

Progress From Recurrent Selection Procedures For The Improvement Of Corn Populations, John H. Lonnquist

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The possibilities of developing synthetic varieties suitable for the fringe areas of the corn belt, where cost of hybrid seed is high relative to the value of the expected crop, and in areas where hybrid corn might not be a feasible approach for other reasons, made it seem a worthwhile objective for study. Effort has been made in recent years to increase the productivity of hybrid combinations through selection of new superior lines using standard breeding procedures. The limited progress realized has resulted in an increased interest in the possible use of alternate methods for the development of superior germplasm …

An Inheritance And Linkage Study Of Barley With Special Emphasis On Purple Pigmentation Of The Auricle, Devon Lyle Doney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

New and better adapted varieties of crop plants have resulted from the application of the principles of genetics. Fundamental research in the field of barley genetics has helped the plant breeder in developing better varieties for specific uses and adaptability.

Barley is one of the best cultivated crop plants for making genetic studies. It has a wide range of adaptability, exhibits a host of contrasting genetic characters, is a simple diploid with only seven pairs of chromosomes, and all the cultivated species are inter-fertile.

The mode of inheritance of nearly 200 characters has been studied, many of whose genes have …

General And Specific Combining Ability Of Five Alfalfa Clones Including Reciprocal Effects For Seedling Vigor And Seed Yield, Edwin Theodore Bingham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The use of F₁ hybrids for commercial production of such cross-pollinated crops as corn, sorghum, sugar beets, onions, and pearl millet suggests the feasibility of using this technique for alfalfa. Production of F₁ hybrids of commercial value is dependent on the use of breeding material expressing good combining ability. In order to obtain precise estimates of combining ability for quantitative characters in alfalfa, it is necessary to produce all possible single crosses among a number of parents. The single cross seed required is difficult to obtain due to the vegetative reproduction and isolation required; and, subsequently, limited testing …

Castor Beans In Trial Plantings : Bundidup Research Station, Wokalup, 1959-60, T Pavy

Journal of the Department of Agriculture, Western Australia, Series 4

THE main producing countries of the world are Brazil, India, U.S.S.R. and U.S.A. This means Australia has to import her supplies of castor oil, which has led to great interest in the possibility of growing castors in Australia.

Since the turn of the century, this interest has been increasing, and has accelerated in recent years, but it has never passed the experimental stage.

Dwarf Fruit Trees, Frank Melville

Journal of the Department of Agriculture, Western Australia, Series 4

IN this country where most fruits and particularly apples and pears are grown without irrigation, heavy crops and summer stress restrict tree size.

The aim of most growers therefore, has been to grow larger trees and little interest has been shown in trees with dwarfing tendencies.

However, in countries with ideal conditions for growth, trees tend to grow too big and become uneconomic in terms of labour costs.

Rice Growing In The Ord River Valley, C B. Langfield

Journal of the Department of Agriculture, Western Australia, Series 4

THE first commercial rice crop in the Ord River Valley was planted late in I960 and plans are in hand for some 35,000 acres of land to be subdivided for irrigation settlement by 1964, with rice as a major crop.

Trees Of Western Australia. 91. The Powder Barked Wandoo (Eucalyptus Accedens - W.V. Fitzgerald). 92. The Dongara Mallee (Eucalyptus Dongarraenis - Maiden And Blakely). 93. The Messmate Or Stringbark (Eucalyptus Tetrodonta F. Muell). 94. The Sturt Creek Mallee (Eucalyptus Odontocarpa F. Muell), Charles Austin Gardner

Journal of the Department of Agriculture, Western Australia, Series 4

THIS species was originally named by W. V. Fitzgerald from specimens which he obtained from near Pingelly in November, 1903.

The name accedens is from the Latin accedo—to approach or come near—and is here used in reference to the supposed close approach of the tree to the common wandoo (Eucalyptus redunca var. elata).

Potato Variety Trial, James P. Fallon, G. C. De Haan

Journal of the Department of Agriculture, Western Australia, Series 4

DELAWARE has been the only variety of Potato grown commercially in Western Australia. This is due to the fact that in the past an early maturing variety with a short dormancy period has been required to suit both hill plantings and swamp crops.

However, with the advent of sprinkler irrigation and hence better control of moisture and growing conditions, the need for early maturing varieties has ceased to exist in some districts.

There has been consequently an increasing interest in testing varieties which have proved high yielding and of good quality in other parts of the world.

The Granny Smith, Frank Melville

Journal of the Department of Agriculture, Western Australia, Series 4

MOST of the commercial apples grown throughout the world today have originated as chance seedlings and commercialised by observant nurserymen or fruit growers.

Many Tasmanian varieties were established this way—the Sturma, Democrat and Crofton.

But the seedling which has had the greatest impact on apple growing in Australia is the Granny Smith and its rise to fame is an interesting story.

Collecting Plant Specimens. 1. Specimens For Identification, Robert Dunlop Royce

Journal of the Department of Agriculture, Western Australia, Series 4

PLANT NAMES and the naming of plant specimens are of fundamental importance in many branches of science, including agriculture.

To the farmer, too, accuracy in naming poisonous plants and weeds, as well as fodder and pasture species, can save much trouble and expense, and may be responsible for avoiding heavy stock losses.

Recommended Wheat Varieties : 1962, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

AS a guide to farmers planting recommended wheat varieties, the Wheat and Sheep Division of the Department of Agriculture has produced a new map of the West Australian wheatbelt, showing where these varieties should be planted.

Wheat Quality, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

IN August, 1956, the Australian Agricultural Council agreed that, as a first step in the further examination of all aspects of the subject of wheat quality in Australia, a conference of all interested parties should be convened by the Department of Primary Industry.

Wheat Variety Trials On Research Stations, J T. Reeves, J. L. Mcmullan

Journal of the Department of Agriculture, Western Australia, Series 4

THE results of wheat variety trials at seven Research Stations in the medium and low rainfall areas for the years 1957, 1958 and 1959 are presented and discussed.

The trials are designed to give information on yield and flour quality of promising crossbreds originating from local breeding programmes and newly produced varieties from other parts of Australia.

Large scale variety trials are the final tests in the long process of selection and testing which is essential before a new crossbred can be released.

The new wheats are compared with standard ones under different conditions of soil and climate.