Data from: Genetic constraints predict evolutionary divergence in Dalechampia blossoms
Data files
Jun 10, 2015 version files 324.26 KB
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phyloLargeGlanded.nex
680 B
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phyloSmallGlanded.nex
670 B
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Populations.csv
49.01 KB
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README.txt
2.73 KB
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TovarDiallel.csv
105.85 KB
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TovarDiallelPedigree.csv
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TulumDiallel.csv
141.68 KB
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TulumDiallelPedigree.csv
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Abstract
If genetic constraints are important, then rates and direction of evolution should be related to trait evolvability. Here we use recently developed measures of evolvability to test the genetic constraint hypothesis with quantitative genetic data on floral morphology from the Neotropical vine Dalechampia scandens (Euphorbiaceae). These measures were compared against rates of evolution and patterns of divergence among 24 populations in two species in the D. scandens species complex. We found clear evidence for genetic constraints, particularly among traits that were tightly phenotypically integrated. This relationship between evolvability and evolutionary divergence is puzzling, because the estimated evolvabilities seem too large to constitute real constraints. We suggest that this paradox can be explained by a combination of weak stabilizing selection around moving adaptive optima and small realized evolvabilities relative to the observed additive genetic variance.