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2015 ; 5
(16
): 3436-49
Nephropedia Template TP
gab.com Text
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Quantitative genetics of plumage color: lifetime effects of early nest
environment on a colorful sexual signal
#MMPMID26380676
Hubbard JK
; Jenkins BR
; Safran RJ
Ecol Evol
2015[Aug]; 5
(16
): 3436-49
PMID26380676
show ga
Phenotypic differences among individuals are often linked to differential
survival and mating success. Quantifying the relative influence of genetic and
environmental variation on phenotype allows evolutionary biologists to make
predictions about the potential for a given trait to respond to selection and
various aspects of environmental variation. In particular, the environment
individuals experience during early development can have lasting effects on
phenotype later in life. Here, we used a natural full-sib/half-sib design as well
as within-individual longitudinal analyses to examine genetic and various
environmental influences on plumage color. We find that variation in
melanin-based plumage color - a trait known to influence mating success in adult
North American barn swallows (Hirundo rustica erythrogaster) - is influenced by
both genetics and aspects of the developmental environment, including variation
due to the maternal phenotype and the nest environment. Within individuals,
nestling color is predictive of adult color. Accordingly, these early
environmental influences are relevant to the sexually selected plumage color
variation in adults. Early environmental conditions appear to have important
lifelong implications for individual reproductive performance through sexual
signal development in barn swallows. Our results indicate that feather color
variation conveys information about developmental conditions and maternal care
alleles to potential mates in North American barn swallows. Melanin-based colors
are used for sexual signaling in many organisms, and our study suggests that
these signals may be more sensitive to environmental variation than previously
thought.