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Unformatted text preview: Heritability estimated as between 0.2 and 1.0 Measuring strength of selection differential Placed 98 Sky Pilots from a small-flowered timberline population in large screened cages that kept bumblebees and other pollinators out Measured flowers later and collected seeds Planted seedlings from these seeds in parental habitat Used the number of progeny from each plant flowering six years later to measure Plants with large corollas have greater fitness than those with smaller corollas Selection gradient = 0.13...
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- Fall '08