THE ECOTYPE CONCEPT IN RELATION TO THE REGISTRATION OF CROP PLANTS

Publisher Website
Google Scholar
Abstract
SUMMARY.: The ecotype concept as formulated by Tuxesson (1922) postulates the existence, in the wild, of sub‐specific units–ecotypes–which result from the environmental fractionation of a larger population. Details are given of the occurrence of these units in nature. While the wild ecotypes are not strictly comparable with the agricultural crop units yet the general principles underlying this concept have a definite agricultural application. Suggestions are made for a standard system of crop classification which embodies data relating to the environmental preferences of its units. Two units of agricultural significance are discussed: (1) the agrotype, or ultimate crop unit, and (2) the agro‐ecotype, or groupof agrotypes possessing similar environmental preferences. The measures necessary for the administration of the scheme are briefly outlined.