UW-Madison Genetics Colloquium - Manyuan Long | March 25, 2026

UW-Madison Genetics Colloquium - Manyuan Long | March 25, 2026

by Manyuan Long

Life & Natural Systems Biology PSALife sciences: general issuesPSAKGenetics (non-medical)
🎙 Manyuan Long 👥 132 📅 March 31, 2026 ⏱ 64 min 👁 41 📄 original study 🧭 2026-08-16
Available in: English (current) Français

Keywords

new gene evolutionsexual antagonismDrosophilagene duplicationfitness effects

Summary

Manyuan Long presents his research on the evolution of new genes and their role in sexual antagonism. He begins by contrasting historical skepticism about new gene origination with modern genomic evidence showing that new genes are common and often essential. He describes mechanisms of new gene formation, including de novo origination from noncoding DNA, and highlights the ‘out of testis’ pattern where young genes are often testis-expressed. The core of the talk focuses on a detailed case study of a young duplicate gene in Drosophila that shows sexually antagonistic effects: it is essential for male fertility but reduces female fertility. Through gene editing and rescue experiments, he demonstrates that this gene has evolved essential functions in both sexes, with opposing fitness effects. He then presents a large-scale RNAi screen of 125 genes in Drosophila, measuring fitness effects in males and females, revealing that many new genes have sex-specific effects and that sexual antagonism is a common force driving gene evolution. He proposes a model where sexual conflict leads to cycles of adaptation and counter-adaptation, shaping gene sequences and functions. The talk concludes with implications for understanding the imperfect nature of life and the importance of new genes in adaptation.

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Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides substantial value by presenting novel empirical data from a large-scale RNAi screen, which is rare in the field. The argumentation is strong, built on rigorous experimental design with multiple controls and statistical modeling. The case study of the young duplicate gene is compelling, with clear evidence of sexually antagonistic effects. The speaker effectively challenges long-held assumptions about new gene evolution and provides a new framework for understanding sexual conflict. However, some conclusions are based on preliminary data and the speaker acknowledges limitations, such as the difficulty of detecting very small fitness effects.

Scientific Rigor, Source Quality, Title Accuracy

The talk demonstrates high scientific rigor, with detailed methodology and controls. The speaker references his own published work and that of others, but does not provide specific citations during the talk. The title accurately reflects the content, and the presentation is well-structured. The speaker’s credentials and the colloquium setting lend credibility. However, as a colloquium talk, the content is not peer-reviewed, and some claims are speculative.

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Title / Content Match

The title accurately reflects the content: a genetics colloquium talk by Manyuan Long on gene evolution and sexual antagonism.

Quality & Reliability

8/10

The talk presents original research from a leading evolutionary geneticist, with detailed methodology and controls. However, it is a colloquium presentation, not peer-reviewed publication, and some claims are preliminary.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • No specific sources cited in the talk — The speaker mentions his own published work and that of others but does not provide specific references.

Concurring Sources

  • No specific concordant sources provided — The talk does not cite external sources directly.

Dissenting Sources

  • No specific discordant sources provided — The talk does not mention conflicting studies.

Contribution & Novelties

This talk presents original research on the evolutionary dynamics of new genes, particularly their role in sexual antagonism. The large-scale RNAi screen provides unprecedented data on fitness effects of young genes in both sexes, revealing that sexual antagonism is common. The proposed model of cyclical sexual conflict offers a new perspective on gene evolution.

Pour aller plus loin :

85 words

Radar Profile

The radar profile shows high scores across all dimensions, indicating a technically rigorous and information-dense presentation. The talk excels in quantity and quality of information, with strong technical depth and reliability.

Reliability 8/10

💬 No comments were provided for analysis.