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- W2953239998 abstract "Sex chromosomes have repeatedly evolved from a pair of autosomes. Consequently, X and Y chromosomes initially have similar gene content, but ongoing Y degeneration leads to reduced expression and eventual loss of Y genes1. The resulting imbalance in gene expression between Y genes and the rest of the genome is expected to reduce male fitness, especially when protein networks have components from both autosomes and sex chromosomes. A diverse set of dosage compensating mechanisms that alleviates these negative effects has been described in animals2-4. However, the early steps in the evolution of dosage compensation remain unknown, and dosage compensation is poorly understood in plants5. Here, we describe a dosage compensation mechanism in the evolutionarily young XY sex determination system of the plant Silene latifolia. Genomic imprinting results in higher expression from the maternal X chromosome in both males and females. This compensates for reduced Y expression in males, but results in X overexpression in females and may be detrimental. It could represent a transient early stage in the evolution of dosage compensation. Our finding has striking resemblance to the first stage proposed by Ohno6 for the evolution of X inactivation in mammals." @default.
- W2953239998 created "2019-06-27" @default.
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- W2953239998 date "2018-08-13" @default.
- W2953239998 modified "2023-10-18" @default.
- W2953239998 title "Genomic imprinting mediates dosage compensation in a young plant XY system" @default.
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- W2953239998 doi "https://doi.org/10.1038/s41477-018-0221-y" @default.
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