ESPM 108B Lecture 13: 13 Migration 2
23 Dec 2018
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We can infer number of gens since divergence based on genetic diversity among lineages. Programs: use a coalescence approach to infer demographic processes from genetic data, direction of migration. Diyabc : model-based approach, want simple models, more parameters = more df. Darwin documented the neg effects of inbreeding in plants - noticed his. The concept of particulate genes allowed wildlife biologists to understand that small pops posed threats to population viability. Major causes of extinction today are from habitat mod: Removal of suitable habitat (restriction to marginal habitat) Exacerbated effects of climate change - suitable habitat may no longer coincide with range. Consequences of reduced pop size to genetic diversity: Increase in genome-wide homozygosity (breeding among relatives) Any 2 indiv in a pop are related if we go back far enough. De ne inbreeding relative to an idealized pop in which all indiv are unrelated.
