Lecture 14 - BIO220

Discovered vernalization induction of early flowering

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Unformatted text preview: eject Mendelian genetics and Darwinism in favor of Lamarck! •Discovered “vernalization” •Induction of early flowering in biennial crops by applying cold treatment Aside: Lamarck/Giraffes •Caused by epigenetic modification of flowering time genes, allowing the plant to “remember” winter What were the consequences? 7 Image from wikipedia 8 -Via plant histone methylation he was able to induce early flowering -Plants have mechanisms to sense when winter passes -If you trick the plant into thinking winter has passed, it will flower s ooner Consequences • From Sir R.A. Fisher: • Lysenko promoted by the communist party leadership • 1930’s to 1960’s USSR policy is that Lysenko ism is official doctrine – In place of Mendelian genetics or Darwinian evolution – Southern crops would be “trained” to grow in the North through Lamarckian breeding • Short term repercussions: – “No, I cannot believe in the light of this speech that the reward of Lysenko's triumphant career is the advance of scientific knowledge ; nor that it is the prosperity of poor peasants. The reward he is so eagerly grasping is Power, power for himself, power to threaten, power to torture, power to kill.” Listener (1948) 40: 874 875. • From Andrei Sakharov, Nuclear Physicist & Nobel Peace Prize Winner: – ~3,000 biologists & geneticists fired, sent to labor camps, or executed – Vavilov died in prison for being an evolutionary geneticist – "He is responsible for the shameful backwardness of Soviet biology and of genetics in particular, for the dissemination of pseudo scientific views, for adventurism, for the degradation of learning, and for the defamation, firing, arrest, even death, of many genuine scientists." • Long t...
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