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A Vavilov Center (of Diversity) is a region of the world first indicated by Nikolai Vavilov to be an original center for the domestication of plants. [4] For crop plants, Nikolai Vavilov identified differing numbers of centers: three in 1924, five in 1926, six in 1929, seven in 1931, eight in 1935 and reduced to seven again in 1940. [5] [6]
N. I. Vavilov, The Problem of the Origin of the World's Agriculture in the Light of the Latest Investigations; Speech at the 1939 Conference on Genetics and Selection; Theoretical base of our researches ; Biography by James P. Smith contains a full list of Vavilov's works, and a timeline of his life and posthumous rehabilitation.
A scenario is a set of related concepts pertinent to the origin of life (abiogenesis), such as the iron-sulfur world. Many alternative abiogenesis scenarios have been proposed by scientists in a variety of fields from the 1950s onwards in an attempt to explain how the complex mechanisms of life could have come into existence. These include ...
Created Date: 8/30/2012 4:52:52 PM
Antonie van Leeuwenhoek. Traditional religion attributed the origin of life to deities who created the natural world. Spontaneous generation, the first naturalistic theory of abiogenesis, goes back to Aristotle and ancient Greek philosophy, and continued to have support in Western scholarship until the 19th century. [15]
If the deep marine hydrothermal setting was the site for the origin of life, then abiogenesis could have happened as early as 4.0-4.2 Gya. If life evolved in the ocean at depths of more than ten meters, it would have been shielded both from impacts and the then high levels of ultraviolet radiation from the sun.
Kurlovich has developed Vavilov's doctrines with reference to lupins. Vavilov's ideas regarding the law of homologous series in hereditary variation gives the answer to the question of which material should be sought, while the theory of the centers of origin of cultivated plants responds to the question of where it should be sought. [5]
The Institute of Plant Industry was established in 1921 in Leningrad by Nikolai Vavilov who set about to create the world's first and largest collection of plant seeds. . Already in 1916 he did his first collection trip abroad, to Iran, and by 1932 he had collected seeds from almost every country in the world, which by 1933 had made the institute the largest seed bank in the world, with more ...