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2017 ; 284
(1862
): ä Nephropedia Template TP
gab.com Text
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Older fathers children have lower evolutionary fitness across four centuries and
in four populations
#MMPMID28904145
Arslan RC
; Willführ KP
; Frans EM
; Verweij KJH
; Bürkner PC
; Myrskylä M
; Voland E
; Almqvist C
; Zietsch BP
; Penke L
Proc Biol Sci
2017[Sep]; 284
(1862
): ä PMID28904145
show ga
Higher paternal age at offspring conception increases de novo genetic mutations.
Based on evolutionary genetic theory we predicted older fathers' children, all
else equal, would be less likely to survive and reproduce, i.e. have lower
fitness. In sibling control studies, we find support for negative paternal age
effects on offspring survival and reproductive success across four large
populations with an aggregate N > 1.4 million. Three populations were
pre-industrial (1670-1850) Western populations and showed negative paternal age
effects on infant survival and offspring reproductive success. In
twentieth-century Sweden, we found minuscule paternal age effects on survival,
but found negative effects on reproductive success. Effects survived tests for
key competing explanations, including maternal age and parental loss, but effects
varied widely over different plausible model specifications and some competing
explanations such as diminishing paternal investment and epigenetic mutations
could not be tested. We can use our findings to aid in predicting the effect
increasingly older parents in today's society will have on their children's
survival and reproductive success. To the extent that we succeeded in isolating a
mutation-driven effect of paternal age, our results can be understood to show
that de novo mutations reduce offspring fitness across populations and time
periods.