Tobacco Breeding in Connecticut (Classic Reprint)

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Excerpt from Tobacco Breeding in ConnecticutTobacco is a naturally close pollinated plant, although inter crossing through the agency of insects is probably somewhat frequent. Observations on the earlier blossoms of the ¿ower head have convinced the writers that in many cases, at least, fertilization of the pistil has taken place before the blossom opens. In the later ¿owers the chances of intercrossing are much greater, as the blossom often opens before fertilization has been accomplished. It is evident that, as tobacco is a naturally close-fertilized plant, it must be vigorous under self fertilization, but some data on actual controlled inbreeding are given to further substantiate this belief.Darwin, in his classical experiments on inbreeding and cross breeding, found some types which were very vigorous when continually self-fertilized.Garner (1912) reports that a number of types have been inbred under bags for six or eight years by the United States Depart ment of Agriculture without any observable change in vigor or growth habit. A certain strain of our present Connecticut Cuban shade type, now grown on one of our large plantations, was inbred for a period of five years (1903-1908) by saving seed from individual plants under a paper bag. Since that time seed has been saved from desirable plants under cloth tent, the chances, however, seeming very small that seed so produced will be cross-fertilized. Instead of showing a loss of vigor due to self-fertilization, this type seems more Vigorous than in the early years of its introduction.The Sumatra type, which has been used as one of our parent varieties, has been inbred for a period of seven years, without giving any evidence of accumulated evil effects of inbreeding.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.