What question did this study set out to answer?

To determine whether duplicated homoeologous gene pairs contribute equally to the transcriptome or undergo biased expression and silencing following polyploidization in cotton.

March 28, 2003Proceedings of the National Academy of Sciences

Genes duplicated by polyploidy show unequal contributions to the transcriptome and organ-specific reciprocal silencing

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To determine whether duplicated homoeologous gene pairs contribute equally to the transcriptome or undergo biased expression and silencing following polyploidization in cotton.
Assayed the expression of 40 homoeologous gene pairs using cDNA-single-stranded conformation polymorphism in natural (Gossypium hirsutum) and synthetic tetraploid cotton.
Evaluated homoeolog expression profiles across 10 distinct plant organs and compared patterns in additional natural polyploid lineages.
Silencing or unequal expression of one homoeolog occurred in 10 of 40 genes examined in ovules of G. hirsutum.
Reciprocal and organ-specific silencing was observed across tissues, with alternate homoeologs silenced depending on the organ examined.
Synthetic tetraploids exhibited homoeolog silencing patterns similar to natural polyploids, indicating both immediate epigenetic responses and long-term evolutionary alterations.

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Implication

Comparative genomic analysis demonstrates organ-specific reciprocal silencing of duplicated genes in tetraploid cotton, suggesting rapid subfunctionalization via epigenetic mechanisms.

Cite This Study

Adams et al. (2003) studied this question.

synapsesocial.com/papers/69e11c2e677156f37e459141 https://doi.org/10.1073/pnas.0630618100

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Implication

Comparative genomic analysis demonstrates organ-specific reciprocal silencing of duplicated genes in tetraploid cotton, suggesting rapid subfunctionalization via epigenetic mechanisms.

Genes duplicated by polyploidy show unequal contributions to the transcriptome and organ-specific reciprocal silencing

Key Points

Discussion

Implication

Cite This Study

Genes duplicated by polyploidy show unequal contributions to the transcriptome and organ-specific reciprocal silencing

Key Points

Discussion

Implication

Cite This Study

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