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Updated: Dec 21, 2025

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Published on: June 16, 2020
Distorted segregation in plant hybrids and its implication for evolution.
1Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, Department of Ecology and Evolutionary Biology, Fudan University, Shanghai 200438, China.
Segregation distortion (SD) in hybrids deviates from expected ratios due to uneven allele inheritance. Understanding SD mechanisms and evolutionary impacts is crucial for predicting species evolution and transgene effects.
Area of Science:
- Evolutionary biology
- Genetics
Background:
- Natural hybridization and introgression can lead to uneven allele inheritance in offspring.
- This uneven inheritance results in segregation distortion (SD), deviating from Mendelian ratios.
Purpose of the Study:
- To review current knowledge on segregation distortion mechanisms.
- To analyze the evolutionary implications of segregation distortion.
Main Methods:
- Literature review of segregation distortion mechanisms.
- Analysis of evolutionary impacts based on existing research.
Main Results:
- Segregation distortion is influenced by genetic interactions, divergence, cytoplasmic factors, and environment.
- SD impacts evolutionary potential, sex ratio, genetic diversity, and divergence maintenance.
Conclusions:
- Segregation distortion plays a significant role in evolution.
- Future studies should investigate transgene effects on SD and its generational changes in wild populations.
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