Lecture 14: Artificial Selection PDF
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Summary
This document is a lecture on artificial selection, a method to modify traits by selecting one trait over another. The lecture examines diverse examples from plant and animal domestication to pesticides' influence and the evolution of resistance, further emphasizing the role of humans in driving evolutionary change. It highlights the importance of collections for evolutionary studies.
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Lecture 14: Artificial Selection BIO 4083: Evolution Today’s Lecture Define artificial selection Related artificial selection to natural selection Discuss examples of artificial selection Humans as agents of selection Humans have domesticated many plants and animals Many variations of both have been...
Lecture 14: Artificial Selection BIO 4083: Evolution Today’s Lecture Define artificial selection Related artificial selection to natural selection Discuss examples of artificial selection Humans as agents of selection Humans have domesticated many plants and animals Many variations of both have been produced by artificial selection Remember our equations for calculating evolutionary response: what variables can humans control? Artificial selection on wild cabbage results in diverse plant forms Gradual increase in cob size documented by archaeologists Domestic dog diversity created in last 25,000 years Pigeon breeding has resulted in many breeds and variants Wild type pigeon Columba livia Pesticides and herbicides act as agents of selection Resistance to pesticides in houseflies Weeds quickly evolve resistance to herbicides Introduced species evolve in response to novel environments Epilobium ciliatum Veronica persica Herbarium specimens Collections are important! Senecio squalidus Flores-Moreno et al. 2015 Evolution of shorter male horns due to hunting Atlantic cod have decreased in size and age at sexual maturity Cod at age 4 and older Swain et al. 2007 Cod fishing has influenced life history: age of sexual maturity Atlantic Cod (Gadus moruha) Hutchings and Rangeley 2011 Assignments Activity on Friday Exam 2 on March 8th
