[The influence of transposable elements on genome size].

Area of Science:

• Genomics
• Molecular Biology
• Evolutionary Biology

Context:

• Genome size varies greatly between species, independent of organismal complexity.
• This variation is largely attributed to the differential abundance of repetitive DNA sequences, particularly transposable elements.
• Transposable elements constitute a significant fraction of many genomes, including human and plant DNA.

Purpose:

• To review recent advancements in understanding the role of non-coding sequences, specifically transposable elements.
• To highlight the significance of transposable elements in genome evolution and diversity.
• To shift focus from coding sequences to the understudied non-coding regions of the genome.

Summary:

• The C value paradox describes the lack of correlation between genome size and organismal complexity.
• Transposable elements, mobile genetic sequences, are key drivers of this paradox and genome evolution.
• These elements can induce mutations, alter chromosome structure, and regulate gene expression, contributing to biological diversity.

Impact:

• Advances in understanding transposable elements offer new insights into genome plasticity and evolutionary processes.
• This research underscores the importance of non-coding DNA in shaping genomes.
• The study provides a foundation for further exploration into the functional roles of repetitive DNA sequences.