Reading3-1 - 14 Reading 3-1 sity was the region of origin This was especially true if much of the variation was controlled by dominant genes and if

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14 Reading 3-1 sity was the region of origin. This was especially true if much of the variation was controlled by dominant genes and if the region also contained wild races of the crop in question. In this essay, he proposed eight centers of origin with some sub-centers, Fig. 1, and these are widely accepted even today. Actually much of the plant exploration conducted by his institute had yet to be done and analyses of previous expeditions had not been completed. The work was more of a literature review and expression of philosophical doctrine than a scienti f c paper based on research data. The techniques for measuring diversity in those days were based on old-fashioned elementary taxonomy. Later, he did develop a classi f cation of agro-ecological groups using such traits as response to day length, cold requirements, reaction to disease, and general adaptation to speci f c environments. While data to support his center of origin theory were not provided at the time, an enormous amount of
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This note was uploaded on 11/18/2011 for the course HIST 302 taught by Professor Jensic during the Summer '10 term at Purdue University-West Lafayette.

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