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F13 lecture 10

Of any deleterious recessive in heterozygous condi7on

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Unformatted text preview: in highly disturbed environments •  some popula7ons may con7nually undergo ex7nc7on- recoloniza7on cycles how does gene?c driF depend on Ne ? •  ΔFST = 1/2Ne •  increase in FST due to gene7c dri_ over one genera7on; Ne = effec7ve size of subpopula7ons –  the smaller the effec7ve pop size, the stronger the gene7c dri_=>more rapid increase in FST •  Over 7me: Ft = 1 – (1- ΔFST)t •  Ft = FST at genera7on t •  (assumes no change in Ne during the t genera7ons) inbreeding with random ma?ng in small popula?ons •  inbreeding can mean –  true inbreeding: ma7ng among rela7ves –  gene7c dri_ –  F or f has been used in the literature •  “inbreeding” due to small popula7on size (if ma7ng is random) is due to gene7c dri_ •  if there is high popula7on structure (popula7on subdivision), ma7ng across the metapopula7on is non- random –  ma7ng outside one’s...
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