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- W4360822023 abstract "Abstract Sexual traits may be selected during multiple consecutive episodes of selection, occurring before, during, or after copulation. The overall strength and shape of selection acting on sexually selected traits may thus be determined by how selection (co-)varies along different episodes. However, it is challenging to measure pre- and postcopulatory phenotypic traits alongside variation in fitness components at each different episode. Here, we used a transgenic line of the transparent flatworm Macrostomum lignano expressing green fluorescent protein (GFP) in all cell types, including sperm cells, enabling in vivo sperm tracking. We exposed GFP(+) focal worms to three groups in which we assessed their mating success, sperm-transfer efficiency, and sperm fertilising efficiency. Moreover, we measured 13 morphological traits on the focal worms to study the fitness landscape in multivariate trait space. We found linear selection on sperm production rate arising from pre- and postcopulatory components, and on copulatory organ shape arising from sperm fertilising efficiency. We further found nonlinear (mostly concave) selection on combinations of copulatory organ and sperm morphology traits arising mostly from sperm-transfer efficiency and sperm fertilising efficiency. Our study shows that contrasting patterns of phenotypic selection are observed by measuring how sexual selection builds-up over consecutive episodes of selection." @default.
- W4360822023 created "2023-03-25" @default.
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- W4360822023 date "2023-03-24" @default.
- W4360822023 modified "2023-10-18" @default.
- W4360822023 title "Contrasting the form and strength of pre- and postcopulatory sexual selection in a transparent worm with fluorescent sperm" @default.
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- W4360822023 doi "https://doi.org/10.1101/2023.03.22.533851" @default.
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