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Related Concept Videos

Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
Genome Size and the Evolution of New Genes03:21

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 Genes03:21

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.
Genomics02:02

Genomics

Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
Organization of Genes02:07

Organization of Genes

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Organization of Genes02:07

Organization of Genes

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Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
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Published on: July 28, 2017

Grass genome organization and evolution.

Katrien M Devos1

  • 1Institute of Plant Breeding, Genetics and Genomics, Department of Plant Biology, University of Georgia, Athens, GA 30602, USA. kdevos@uga.edu

Current Opinion in Plant Biology
|January 13, 2010
PubMed
Summary
This summary is machine-generated.

Sequencing five grass species reveals distinct genome structures. Large grass genomes feature interspersed repeats, potentially driving evolutionary changes and gene diversification.

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Last Updated: Jun 17, 2026

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Area of Science:

  • Genomics
  • Plant Biology
  • Evolutionary Biology

Background:

  • Grass genomes exhibit diverse structural organizations.
  • Understanding genome evolution is crucial for plant science.

Purpose of the Study:

  • To sequence and compare the genomes of five grass species.
  • To investigate the structural organization and evolution of grass genomes.

Main Methods:

  • Whole-genome sequencing of five grass species.
  • Comparative genomic analyses focusing on gene and repeat organization.

Main Results:

  • Significant differences in gene and repeat organization between small and large grass genomes were identified.
  • Small genomes show clear partitioning of gene-rich and gene-poor regions, unlike larger genomes.
  • Large genomes exhibit interspersed repeats, potentially impacting collinearity and promoting gene diversification.

Conclusions:

  • Genome size influences the structural organization of grass genomes.
  • Repeat content and distribution play a key role in genome evolution and diversification.
  • Mechanisms like repeat turnover, rearrangements, and gene duplication contribute to grass genome diversification.