Description
Excerpt from The Use of Colchicine in Plant Breeding
From the results on induced polyploids it has been shown that the degree of fertility of these plants is usually affected. In a number of cases sterile hybrids resulting from hybridization between Species of the same or closely related genera have been made fertile by chromosome doubling, while with others that has not been possible. Often where the plants have been highly fertile, they are made less fertile. Lessening of the fertility or inducing complete sterility by polyploidy may not always be deleterious. Where, for instance, plants are propagated vegetatively and grown for leaves and flowers or other plant parts, sterility may even be desirable. In such fruits as strawberries and raspberries, lowering of fertility causes numerous seeds to fail to develop and results in partly. Developed and deformed fruits. However, such plants may become of great value as breeding material.
A number of reports indicate that besides quantitative changes in plants resulting from polyploidy there also have been changes of qualitative character. These may be in color intensity of leaves and flowers; in fragrance of leaves, flowers, or other plant parts; and in content of oils, starches, sugars, and vitamins. Fundamentally these changes that are ordinarily considered qualitative are mostly, if not entirely, changes of quantitative nature, since they result from either an increase or a decrease of the various products naturally present in the plants.
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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
From the results on induced polyploids it has been shown that the degree of fertility of these plants is usually affected. In a number of cases sterile hybrids resulting from hybridization between Species of the same or closely related genera have been made fertile by chromosome doubling, while with others that has not been possible. Often where the plants have been highly fertile, they are made less fertile. Lessening of the fertility or inducing complete sterility by polyploidy may not always be deleterious. Where, for instance, plants are propagated vegetatively and grown for leaves and flowers or other plant parts, sterility may even be desirable. In such fruits as strawberries and raspberries, lowering of fertility causes numerous seeds to fail to develop and results in partly. Developed and deformed fruits. However, such plants may become of great value as breeding material.
A number of reports indicate that besides quantitative changes in plants resulting from polyploidy there also have been changes of qualitative character. These may be in color intensity of leaves and flowers; in fragrance of leaves, flowers, or other plant parts; and in content of oils, starches, sugars, and vitamins. Fundamentally these changes that are ordinarily considered qualitative are mostly, if not entirely, changes of quantitative nature, since they result from either an increase or a decrease of the various products naturally present in the plants.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Details
Publisher - Forgotten Books
Language - English
Hardback
Contributors
Author
Haig Dermen
Published Date -
ISBN - 9781396008986
Dimensions - 22.9 x 15.2 x 0.1 cm
Page Count - 19
Paperback
Contributors
Author
Haig Dermen
Published Date -
ISBN - 9781390515879
Dimensions - 22.9 x 15.2 x 0.1 cm
Page Count - 19
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