Type and Variability in Corn (Classic Reprint)
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Davenport, E.) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Type and Variability in Corn Three conceptions of type should rest in the breeder´s mind: 1. The ideal, or standard for selection; attained by few individuals, perhaps by none. Page 2 2. The mode, or prevailing type as represented by the highest proportion of what the breeder actually produces. Page 6 3. The mean, or average of all the breeder produces. Page 7 Variability is deviation from type. It is best indicated by the standard deviation, a mathematical expression involving the deviation of every individual. Page 11 Variability may be reckoned from the mean, the mode, the selection standard, or any other desired basis. Page 12 The coefficient of variability is a purely abstract expression for variability, so that by its means the variability of one character may be compared with that of another either in the same or different races. Page 12 The effect of selection is to shift the type without greatly reducing variability. Page 17 Each character of every race has a variability that is natural, and this variability cannot be greatly reduced by selection. Page 19 The indirect effect of selection is to influence physical or other characters correlated with those selected. Page 20 The type of ear is directly affected by fertility, so far as length, circumference and weight are concerned, but not as to number of rows. Page 21 Variability is slightly less on fertile land than on lands giving lower yields. Page 24 The breeder of the future will be a statistician and a bookkeeper. 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.
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