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Genome Size and the Evolution of New Genes

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.

Genome Size and the Evolution of New Genes

Genome Size and the Evolution of New Genes

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

The Evidence for Evolution

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.

Convergent Evolution

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

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Updated: Jan 24, 2026

Geomagnetic Field Gmf and Plant Evolution: Investigating the Effects of Gmf Reversal on Arabidopsis thaliana Development and Gene Expression

Geomagnetic Field Gmf and Plant Evolution: Investigating the Effects of Gmf Reversal on Arabidopsis thaliana Development and Gene Expression

Published on: November 30, 2015

From Candidate Genes to Macroevolution: An Integrated Approach to Modeling the Evolution of Plant Innovations.

Carrie M Tribble^1,2, Verónica S Di Stilio¹

¹Department of Biology, University of Washington, Seattle, WA 98195-1800, USA.

Integrative and Comparative Biology

|January 23, 2026

Summary

Integrating genomic, developmental, and evolutionary data is key to understanding plant innovation. Building a "Functional Tree of Plant Life" requires investment in tools and methods for diverse plant species.

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Last Updated: Jan 24, 2026

Geomagnetic Field Gmf and Plant Evolution: Investigating the Effects of Gmf Reversal on Arabidopsis thaliana Development and Gene Expression

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Molecular Evolution of the Tre Recombinase

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Area of Science:

Evolutionary Biology
Genomics
Developmental Biology

Background:

Understanding plant evolution requires integrating mechanisms across biological scales.
Genomic data and phylogenetic methods offer opportunities for integration, but functional tools are unevenly distributed.
Conceptual differences across research scales limit current integration efforts.

Purpose of the Study:

To highlight emerging approaches bridging developmental, genomic, and macroevolutionary research for a comprehensive view of plant evolution.
To propose the development of a "Functional Tree of Plant Life".

Main Methods:

Utilizing accessible genomic data and advanced phylogenetic comparative methods.
Highlighting emerging approaches that integrate developmental, genomic, and macroevolutionary research.
Proposing investment in shared infrastructure for transformation techniques and genetic resources in non-model taxa.

Main Results:

Emerging approaches can bridge different scales of biological inquiry.
Investment in functional tools and genetic resources is needed for non-model taxa.
Methodological advances in phylogenetic comparative methods are crucial for integrating complex data.

Conclusions:

Building an integrative framework requires conceptual synthesis, collaboration, and community investment.
This framework will enable experimental validation of gene function across diverse plant lineages.
It will improve reconstructions of genetic pathway evolution and the developmental origins of phenotypes, offering a transformative path for understanding plant form and function.