{"id":235383,"date":"2017-03-28T13:31:00","date_gmt":"2017-03-28T16:31:00","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/en\/?p=235383"},"modified":"2017-03-28T14:02:26","modified_gmt":"2017-03-28T17:02:26","slug":"genetics-roots-in-brazil","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/genetics-roots-in-brazil\/","title":{"rendered":"Genetics\u2019 roots in Brazil"},"content":{"rendered":"
\"Mendes\u2019

ESALQ Collection <\/span><\/a> Mendes\u2019 classes on Mendelian genetics at ESALQ were based on his doctoral dissertation defended in 1917ESALQ Collection <\/span><\/p><\/div>\n

European scientists\u2019 rediscovery of Austrian monk Gregor Mendel\u2019s (1822-1884) works on the transmission of traits in peas, in 1901, expanded the possibilities of research into what was then a new and promising field of modern biology: genetics. From that early century beginning, researchers in many parts of the world devoted themselves to studies of heredity and genetic variability in plant and animal species.\u00a0 In Brazil, the ideas of Mendel began to be disseminated in the late 1910s through the teaching and research activities of S\u00e3o Paulo agronomist Carlos Teixeira Mendes (1888-1950), professor from the Practical School of Agriculture of Piracicaba, at the time associated with the S\u00e3o Paulo State Board of Agriculture.\u00a0 In 1934, the school by then renamed the Luiz de Queiroz College of Agriculture, became one of the units of the emerging University of S\u00e3o Paulo, (ESALQ-USP).<\/p>\n

In 1918, four years after returning from a period of studies at the National Institute of Agronomy of Grignon, France, and resuming his activities at the College of Agriculture, Mendes gave his first lectures on Mendelian genetics in agronomy and animal husbandry courses, the latter coordinated by his former student Ot\u00e1vio Domingues (1897-1972), who would come to be one of the promoters of Mendel\u2019s laws in Brazil and a pioneer in research regarding the country\u2019s genetic improvement of animals.<\/p>\n

\"The

Piracicaba Institute of History and Geography<\/span><\/a> The former Agricultural School of PiracicabaPiracicaba Institute of History and Geography<\/span><\/p><\/div>\n

Classes on Mendelism and the new science of hybridization were based on Mendes\u2019 dissertation, presented in 1917 as a result of his experimental research in these fields at ESALQ.\u00a0 His studies enabled him to go beyond the classic examples of transmission of traits in peas to address the improvement of crops that were important for Brazilian agriculture, as confirmed by science historian Paula Arantes Habib of the University of Bras\u00edlia (UnB), when analyzing the class notebooks and books bearing annotations by Mendes. \u201cThe teaching and research involving the laws of heredity at ESALQ can be seen as the beginning of the institutionalization of genetics in Brazil,\u201d she says.<\/p>\n

According to Habib, Mendes recognized Mendelism as a valid theory for improving plants.\u00a0 Even so, he defended empirical selection as the best way of developing Brazilian agriculture.\u00a0 The researcher considered this technique simpler than Mendelian hybridization, which he thought not viable for the creation and stabilization of varieties of plants suited for large-scale cultivation.\u00a0 Empirical selection basically consisted of selecting and crossing the best seeds of the harvest.\u00a0 It required that the selector know how to choose the best possible seeds from the standpoint of phenotype (visible characteristic) rather than the genotype (genetic composition) standpoint.\u00a0 Furthermore, this technique could easily be taught to small farmers.<\/p>\n

Nearly 10 years later, in 1928, Mendes\u2019 work at ESALQ paved the way for genetics to begin to be employed by the Campinas Institute of Agronomy (IAC) in improving products such as coffee and corn, and in adapting other seeds such as wheat and barley to the Brazilian environment.<\/p>\n

\"In

ESALQ Collection <\/span><\/a> In Brazil, German geneticist Friedrich Brieger developed an ambitious research program in geneticsESALQ Collection <\/span><\/p><\/div>\n

With the founding of USP, genetic research received fresh impetus. Andr\u00e9 Dreyfus (1897-1952), a physician who earned his degree at the School of Medicine of Rio de Janeiro, was responsible for establishing a center for genetic studies at the new university.\u00a0 Under his orientation, many researchers interested in cytology and genetics came together at the Department of General Biology of USP.\u00a0 Among them were Crodowaldo Pavan (1919-2009), another important member of the group who helped institutionalize genetics in Brazil (see the special report on Crodowaldo Pavan<\/a>). Years later, Dreyfus would coordinate with the Rockefeller Foundation to bring Russian-born naturalized American citizen Theodosius Dobzhansky of Columbia University to Brazil to introduce the study of the genetics of drosophilae (fruit flies) to Brazil.<\/p>\n

In 1936, in another effort towards institutionalization of research on genetics in Brazil, ESALQ invited German geneticist Friedrich Gustav Brieger (1900-1985) to set up a department of genetics at that institution.\u00a0 A few years earlier, Brieger had worked at the Kaiser Wilhelm Institute in Germany with Carl Correns, one of the scientists who rediscovered the writings of Mendel (see Pesquisa FAPESP <\/em>Issue n\u00ba 239<\/a>). Brieger accepted the invitation and, with the help of the Rockefeller Foundation, developed an ambitious program of plant genetics and an exchange program with foreign scholars. \u201cThese scientists took part in the national scientific debate so they could contribute to the discussion, dissemination and institutionalization of genetics in Brazil,\u201d Habib says.<\/p>\n","protected":false},"excerpt":{"rendered":"Mendelism teaching in agronomy schools of S\u00e3o Paulo began in 1910 ","protected":false},"author":346,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[152],"tags":[153,209,237,241],"coauthors":[662],"class_list":["post-235383","post","type-post","status-publish","format-standard","hentry","category-retrospect","tag-agronomy","tag-biology","tag-genetics","tag-history"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/235383","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/346"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=235383"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/235383\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=235383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=235383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=235383"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=235383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}