Journal
TWIN RESEARCH AND HUMAN GENETICS
Volume 12, Issue 6, Pages 555-563Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1375/twin.12.6.555
Keywords
Big One; heritability; nonadditive genetic variance; general factor of personality
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We reanalyze previously published data on 309 MZ and 333 DZ twin pairs aged 25 to 74 years from the MIDUS survey, a nationally representative archived sample, to examine how much of the genetic covariance between a general factor of personality (GFP), a lower-order life history factor, and a general physical and mental health factor, is of the nonadditive variety. We found nonadditive genetic effects (D) could not be ruled out as a contributor to the shared variance of these three latent factors to a Super-K Life History factor. We suggest these genetic correlations support the view that a slow (K-selected) life history strategy, good health, and the GFP coevolved and are mutually coadapted through directional selection.
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