The condition-dependence of male genital size and shape
Data files
Mar 18, 2024 version files 846.59 KB
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Diet_and_Total_Offspring.xlsx
20.19 KB
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Diet_Restriction_Data.csv
155.58 KB
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Group_Means_Inbreeding_Shape.xlsx
21.06 KB
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Inbreeding_Data.csv
622.46 KB
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README.md
2.30 KB
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Repeatability_Measurements_Dryad.csv
25 KB
Abstract
The male genitals of internal fertilizers evolve rapidly and divergently, and sexual selection is generally responsible for this. Many sexually selected traits are condition-dependent - with their expression dependent upon the resources available to be allocated to them - as revealed by genetic or environmental manipulations of the condition. However, it is not clear whether male genitals are also condition-dependent. Here we manipulate the condition in two ways (via inbreeding and diet) to test the condition-dependence of the genital arch of Drosophila simulans. We found that genital size but not genital shape suffered from inbreeding depression, whereas genital size and shape were affected by dietary manipulation of the condition. The differential effects of these treatments likely reflect the underlying genetic architecture that has been shaped by past selection: inbreeding depression is only expected when traits have a history of directional selection, while diet impacts traits regardless of historical selection. Nonetheless, our results suggest genitals can be condition-dependent like other sexually selected traits.
README: The condition-dependence of male genital size and shape
https://doi.org/10.5061/dryad.rn8pk0pk9
All data necessary to reproduce findings from the manuscript.
Description of the data and file structure
1) Repeatability_Measurements
- Repeatability measurements (measurements A and B) for genital Relative Warp (RW) scores for all Relative Warps (RW1-5 explained most variation in shape and was therefore used in the analyses).
- Repeatability measurements (measurements A and B) for centroid size.
2) Diet_Restriction_Data
- In column 'DietRestriction', '0' refers to an ad libitum diet, and '40' refers to a restricted diet.
- Genital Relative Warp (RW) scores for diet restriction experiment. RW1-5 explained most variation in shape and was therefore used in the analyses.
- Centroid sizes (ScaledCentroidSize) for diet restriction experiment.
- Leg length (um) for diet restriction experiment.
3) Inbreeding_Data
- 'Cross' refers to inbred or outbred crosses. 'FamilyA' and 'FamilyB' refer to the IDs of families used in the crosses. 'Group' refers to the IDs of groups formed by each pair of families.
- Genital Relative Warp (RW) scores for the inbreeding experiment. RW1-5 explained most variation in shape and was therefore used in the analyses
- Centroid sizes (ScaledCentroidSize) for inbreeding experiment.
- Leg length (um) for the inbreeding experiment.
4) Group_Means_Inbreeding_Shape
- Data for pairwise analysis. 'Group' refers to the IDs of groups formed by each pair of families.
- Average genital Relative Warp scores for inbred and outbred individuals from each group. For example, 'AvgOutRW1' refers to the average score of Relative Warp 1 for outbred individuals, and 'AvgInbRW1' refers to the average score of Relative Warp 1 for outbred individuals.
- Average centroid sizes for inbred (AvgInbCentSize) and outbred (AvgOutCentSize) individuals from each group.
5) Diet_and_Total_Offspring
- Total offspring count for males on restricted ('dietrestiction'=40) and ad-libitum ('dietrestriction'=0) diet. Columns 's1off', 's2off', and 's3off' refer to offspring counts from the three vials used for fitness assays, and 'totoff' refers to the total offspring counted from the three vials.
Methods
A Drosophila simulans stock outbred population, derived from flies collected in Australia in 2004, was used as part of the inbreeding and diet experiments.