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Understanding Species and Reproductive Barriers

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Related Experiment Video

Updated: Jul 7, 2026

Determination of Self- and Inter-(in)compatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses
08:08

Determination of Self- and Inter-(in)compatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses

Published on: June 16, 2020

When gametophytic self-incompatibility meets gynodioecy.

Bodil K Ehlers1, Mikkel H Schierup

  • 1Institute of Biological Sciences, Department of Ecology and Genetics and Bioinformatics Research Center, University of Aarhus, Aarhus, Denmark.

Genetics Research
|February 22, 2008
PubMed
Summary
This summary is machine-generated.

Gynodioecious populations more readily lose self-incompatibility, promoting female stability. This breakdown is influenced by factors like S-allele number and fecundity selection, especially mutations affecting female function.

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Determination of Self-(In)compatibility and Inter-(In)compatibility Relationships in Citrus Using Manual Pollination, Microscopy, and S-Genotype Analyses

Published on: June 30, 2023

Area of Science:

  • Evolutionary biology
  • Plant reproductive strategies
  • Population genetics

Background:

  • Gynodioecy, the co-occurrence of females and hermaphrodites, is often linked to self-compatibility in angiosperms.
  • Understanding the breakdown of self-incompatibility systems is crucial for plant reproductive evolution.

Purpose of the Study:

  • To investigate the conditions favoring the breakdown of gametophytic self-incompatibility in gynodioecious populations.
  • To compare these conditions with those in hermaphroditic populations.
  • To assess the impact of breakdown on gynodioecious population stability and female frequency.

Main Methods:

  • Individual-based simulations were employed to model the evolutionary dynamics.
  • Three distinct mutation types leading to self-compatibility were analyzed.
  • Simulations varied S-allele number, inbreeding depression, and selfing rate.

Main Results:

  • The conditions for self-incompatibility breakdown are less stringent in gynodioecious populations compared to hermaphroditic ones.
  • Breakdown of self-incompatibility increases the frequency of females, enhancing gynodioecious population stability.
  • Fecundity selection significantly impacts the probability of breakdown, particularly for mutations affecting the S-locus's female function.

Conclusions:

  • Gynodioecy facilitates the loss of self-incompatibility, contributing to the maintenance of this mating system.
  • The evolution of self-compatibility in gynodioecious species can stabilize female production.