Abstract
Theodosius Dobzhansky was a great traveler and,during his adult life, he developed this tendency thor-oughly. Greater even than his roving was his obsession toconvey his ideas and theories to young and old people, notonly to his North-American colleagues and students, butalso to many other people in different parts of the world,wherever he could go. A great part, if not all, of his trips in-sideandoutsidetheUSAwereconnectedwithhisresearch,with teaching or with helping people to organize their labo-ratories or research projects.Hetraveledtomanyplacesonthefivecontinents,andeverywhere he was he left seeds of his knowledge andthoughts. His contribution to the development of Geneticsin Brazil was undoubtedly his most successful enterpriseoutside the USA. To understand the role Dobzhanskyplayedinthedevelopmentof
Highlights
He traveled to many places on the five continents, and everywhere he was he left seeds of his knowledge and thoughts
One of us (ABC) went to Columbia University as a fellow of the Rockefeller Foundation, when Dobzhansky returned to the USA in 1950, and started studying the influence of food, using yeasts and bacteria collected from the crop of flies in nature
The results showed that the adaptive values of three genotypes studied varied according to the type of food available
Summary
He traveled to many places on the five continents, and everywhere he was he left seeds of his knowledge and thoughts. The analysis of these chromosomes, involving the identification and counting of more than half a million flies, showed that the natural D. willistoni populations have a great genetic variability. The work on chromosomal inversions of D. willistoni went on for several years (Cunha et al 1950; Cunha and Dobzhansky, 1954, 1959 a).
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