Data from: Reduced mate availability leads to evolution of self-fertilization and purging of inbreeding depression in a hermaphrodite
| Main Authors: | Noël, Elsa, Chemtob, Yohann, Jänicke, Tim, Sarda, Violette, Pélissié, Benjamin, Jarne, Philippe, David, Patrice |
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| Format: | info dataset Journal |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5010408 |
Daftar Isi:
- Basic models of mating-system evolution predict that hermaphroditic organisms should mostly either cross-fertilize, or self-fertilize, due to self-reinforcing coevolution of inbreeding depression and outcrossing rates. However transitions between mating systems occur. A plausible scenario for such transitions assumes that a decrease in pollinator or mate availability temporarily constrains outcrossing populations to self-fertilize as a reproductive assurance strategy. This should trigger a purge of inbreeding depression which in turn encourages individuals to self-fertilize more often and finally to reduce male allocation. We tested the predictions of this scenario using the freshwater snail Physa acuta, a self-compatible hermaphrodite that preferentially outcrosses and exhibits high inbreeding depression in natural populations. From an outbred population, we built two types of experimental evolution lines, controls (outcrossing every generation) and constrained lines (in which mates were often unavailable, forcing individuals to self-fertilize). After ca. twenty generations, individuals from constrained lines initiated self-fertilization earlier in life and had purged most of their inbreeding depression compared to controls. However, their male allocation remained unchanged. Our study suggests that the mating system can rapidly evolve as a response to reduced mating opportunities, supporting the reproductive assurance scenario of transitions from outcrossing to selfing.
- data used for Age at First Reproductionthis file contains ages at first reproduction and weight at first reproductionDATA AFR DRYAD.csvmale functionThis file contains data for number of offspring by male function and paternity successfonctionmale dryad.csvfemale function DRYADthis file contains female fecundity and juvenile survival for adult inbreeding depressionInbreeding Depression first experiment DRYADInbreeding Depression second experiment DRYADcomportment observations data DRYADthis file contains all data from observations of sexual comportment: time spent on copulation male and female, number of partners, number of copulations...