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  • 1
    Publication Date: 1899-01-28
    Print ISSN: 0036-8733
    Electronic ISSN: 1946-7087
    Topics: Biology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 2
    Publication Date: 1909-10-01
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 3
    Publication Date: 1912-06-01
    Description: The F2 generation of crosses between a number of varieties of wheat susceptible to the attacks of Yellow Rust (Puccinia glumarum) and “American Club.” which shows an extraordinary degree of resistance to the attacks of this parasite showed in the year 1906 obvious segregation into immune and susceptible forms. The immunity was further found to be independent of any recognizable morphological feature. An analysis of these F2 generations demonstrated the fact that the immune plants were present to the extent of 25 per cent., that is that the property of resisting the attacks of Yellow Rust behaves as a recessive character to the property of being susceptible. The plants which proved susceptible showed, however, very varied degrees of susceptibility. Many were as covered with rust pustules as Michigan Bronze, one of the extremely susceptible varieties used as a parent. Others on the other hand were relatively slightly attacked and between these extremes all degrees of susceptibility appeared to exist. Nilsson-Ehle who has also observed the segregation of this pair of characteristics has also noted the wide differences in susceptibility in plants of the F2 and succeeding generations.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 4
    Publication Date: 1905-05-01
    Description: The following note is concerned solely with the behaviour of certain characters in hybrid barleys which bear on the inheritance of sterility and the question whether sex is, as it seems possible, a phenomenon of gametic segregation. I have used the term “sterility” in a broader sense than usual to include cases in which certain florets set no grain owing to the suppression of either the female or both the male and female reproductive organs. The plants themselves are in no cases completely sterile. The other characters occurring in the numerous varieties of barley will be considered in detail later.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 5
    Publication Date: 1907-04-01
    Description: The following experiments on the hybridisation of barley were commenced in 1901; consequently the inheritance of some of the characteristics has been known for some time. In view of the fact that from the earlier accounts of Rimpau and Tschermak the main outlines of the story could be traced without any special difficulty, there appeared to be no necessity for immediate publication. This was delayed, therefore, in order to complete the investigation of one or two doubtful points. The literature of barley-breeding published prior to the year 1900 is rather extensive, but of comparatively little interest to the modern student of heredity. The most important papers are those of Liebscher and Rimpau. That part of Rimpau's great paper, “Kreuzungprodukte Landwirtschaftliche Kulturpflanzen,” dealing with barley, is of exceptional interest on account of its extreme thoroughness and the completeness of the records it contains. As one reads it one cannot help thinking that Rimpau must have come very near to making an independent discovery of Mendel's laws of inheritance.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 6
    Publication Date: 1907-01-01
    Description: The following résumé of the work so far published by the Home-grown Wheat Committee of the National Association of British and Irish Millers is based upon a paper presented by one of us to the International Convention of Millers which met in Paris during October, 1905. This work being well past the tentative and preliminary stages it proved possible to make a broad survey of it and to piece together isolated special portions which have been published from time to time.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 7
    Publication Date: 1905-01-01
    Description: The investigations to be described below are the outcome of some experiments started in 1900 which had in view the improvement of English-grown wheat. The necessity of such work may not be evident to all, so at the outset I will sketch in broad outlines the state of affairs which led me to undertake the task. The fact is generally recognized that the wheats of this country are characterized by their high yields per acre and by the shapeliness of their grain. We can grow on the average over 30 bushels to the acre where the United States grow 14, Russia 10, and the Argentine 7. Yet the acreage under wheat in this country has fallen from three and a-half million acres in 1876 to one and a-half million in 1903, and we now grow approximately only one-fifth of the wheat we consume. Further than this there is good evidence to show that the quality of the grain now grown is inferior to that of twenty years ago. It has been sacrificed to yield, and many of the better class varieties, such as Chiddam, Red Lammas and Rough Chaff, have been more or less driven out of the field by varieties such as Square Head and Rivet, which are capable of giving slightly larger crops of grain and straw. These inferior varieties have now to compete with wheat imported from Canada, the United States, Russia and other countries. The seriousness of the position becomes evident when one finds English wheat selling at 28s. 6d. a quarter when Manitoba Hard is selling at 35s.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 8
    Publication Date: 1907-04-01
    Description: On crossing immune and susceptible varieties the resulting offspring is susceptible.On self-fertilization these susceptible individuals produce immune and susceptible descendants in the proportion of one of the former to three of the latter. The degree of susceptibility is variable.Where the degree of susceptibility differs in the two parents the hybrid resembles the more susceptible parent in that respect. Among the descendants of such hybrids the two degrees of susceptibility appear in the usual Mendelian ratio of one slightly to three very susceptible individuals.The relatively immune forms breed true to this characteristic in the succeeding generations.Immunity is independent of any discernible morphological character, and it is practicable to breed varieties morphologically similar to one another, but immune or susceptible to the attacks of certain parasitic fungi.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 9
    Publication Date: 1908-12-01
    Description: The experiments carried out by the Home Grown Wheat Committee of the National Association of British and Irish Millers have demonstrated the important fact that certain varieties of wheat retain their strength under our conditions. One of the best known of these varieties is Red Fife, the grain of which forms the basis of the graded wheat known as Manitoba Hard. Red Fife has now been tested in this country for six seasons and its strength is still found to be equal to that of the same variety when grown in Canada. Further a somewhat impure stock of the same variety has been cultivated in the Midlands for some sixteen seasons without showing any signs of diminution in strength. As grain of this character is considerably more valuable than that generally grown in this country and as there is a steadily increasing demand for it, the Committee recommended the experimental cultivation of Red Fife in various parts of the country. The results of these trials have shown that in some localities Red Fife will produce more profitable crops than any of the common English wheats, though in others its yield is too small for its profitable cultivation. In spite of very complete returns furnished by growers in most parts of the country it seems impossible at present to state with any precision what the factors are which determine whether it can be grown successfully. Its extended cultivation has also brought out the fact that the straw is not as rigid as the farmer would wish it to be and more than one grower has condemned the variety on this account.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 10
    Publication Date: 1911-05-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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