The genetic architecture of fitness in a seed beetle: assessing the potential for indirect genetic benefits of female choice |
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| Authors: | T Bilde U Friberg AA Maklakov JD Fry G Arnqvist |
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| Affiliation: | (1) Animal Ecology/Department of Ecology and Evolution, Evolutionary Biology Centre, University of Uppsala, SE-753 32 Uppsala, Sweden;(2) Department of Biological Sciences, Ecology and Genetics, University of Aarhus, 8000 Aarhus C, Denmark;(3) Department of Ecology, Evolution and Marine Biology, University of California, 93106-9610 Santa Barbara, California, USA;(4) School of Biological, Earth and Environmental Sciences, The University of New South Wales, 2052 Kensington, Sydney, Australia;(5) Department of Biology, University of Rochester, 14627-0211 Rochester, New York, USA |
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| Abstract: | Background Quantifying the amount of standing genetic variation in fitness represents an empirical challenge. Unfortunately, the shortage of detailed studies of the genetic architecture of fitness has hampered progress in several domains of evolutionary biology. One such area is the study of sexual selection. In particular, the evolution of adaptive female choice by indirect genetic benefits relies on the presence of genetic variation for fitness. Female choice by genetic benefits fall broadly into good genes (additive) models and compatibility (non-additive) models where the strength of selection is dictated by the genetic architecture of fitness. To characterize the genetic architecture of fitness, we employed a quantitative genetic design (the diallel cross) in a population of the seed beetle Callosobruchus maculatus, which is known to exhibit post-copulatory female choice. From reciprocal crosses of inbred lines, we assayed egg production, egg-to-adult survival, and lifetime offspring production of the outbred F1 daughters (F1 productivity). |
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