4VariacionEvolucion2b copy.pdf - Instituto de Ecología

Estimate do the effective population size N e !Alcohol dehydrogenase, Adh; θ= 4 N e µ!µ = 6.5 x 10 -9 , as in the Adh locus in grasses!!! ! ! ! ! N e from θ !Species ! !Sn (θ) ! ! π ! !Ns!Hordeum vulgare !190,000 !180,000 !420,000!Zea spp. ! !1,830,000 !1,890,000 !1,690,000!Pennisetum glaucum !296,000 !260,000 !407,000!Arabidopsis thaliana !790,000 !990,000 !628,000!Arabis gemminifera !170,000 !110,000 !390,000!!The only out-crosser Zea, an order of magnitude larger.!!In a given species, estimates may differ among methods, but arein the same order of magnitude.!Between 260,000 & 1,890,000 individuals: but all these estimatecan be affected both by Natural Selection and by demography!