Abstract
Archives: The law of homologous series in variation (N. I. Vavilov).
Highlights
A century has passed since the days when the law of homologous series in variation was first manifested
In his book Evolution by Means of Hybridization (1916), proposes to introduce a new terminology to distinguish fundamental units in the classification of hereditary forms. He proposes to call the old Linnean species, which, as was shown in the nineteenth century, are of collective nature – “Linneons”; races, varieties, which make up the elementary species of Jordan and de Vries he proposes to define as “Jordanons”
Garded as uniform, in the twentieth century were separated by plant breeders and systematists into large numbers of Jordanons, distinguishable both morphologically and physiologically; e.g. many species of Gramineae, Compositae, Cruciferae, Leguminoseae, Sesamum indicum, Viola tricolor, Linnea borealis, etc
Summary
A century has passed since the days when the law of homologous series in variation was first manifested. This event happened in 1920 in Saratov, in the third post-revolution year, in the frameworks of the III All-Russian Conference on Plant Breeding, mobilized in view of current needs of agricultural practice, science and education. Vavilov’s generalization on the phenomenon of the homologous series in variation of cultivated plants was reported on June, 4, 1920 and enthusiastically appreciated by the qualified breeders as a great scientific achievement comparable with the Mendeleev’s periodic Law of the chemical elements. Very soon after the initial Russian publication (Vavilov 1920), the paper entitled “The Law of Homologous Series in Variation” was published in the Journal of Ge-.
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