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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

Genomics

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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...

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Related Experiment Video

Updated: Feb 5, 2026

Development of Targeting Induced Local Lesions IN Genomes TILLING Populations in Small Grain Crops by Ethyl Methanesulfonate Mutagenesis

Development of Targeting Induced Local Lesions IN Genomes TILLING Populations in Small Grain Crops by Ethyl Methanesulfonate Mutagenesis

Published on: July 16, 2019

Genomic approaches for studying crop evolution.

Mona Schreiber¹, Nils Stein¹, Martin Mascher^2,3

¹Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Corrensstraße 3, 06466, Seeland, Germany.

|September 23, 2018

Summary

This summary is machine-generated.

Understanding crop evolution and domestication reveals agriculture's origins. Genomic studies are key to uncovering the molecular basis of how crops changed and spread globally.

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Area of Science:

Agricultural Science
Genetics
Evolutionary Biology

Background:

Crop plants originated from wild relatives, with their spread informing the history of agriculture.
Understanding crop evolution is crucial for agricultural development and food security.

Purpose of the Study:

To review the role of genomic resources and tools in studying crop domestication and evolution.
To propose future research directions in crop evolution.

Main Methods:

Review of genetic mapping and population genetic studies.
Analysis of genomic resources and tools.

Main Results:

Genomic resources and tools have enabled detailed studies of crop domestication and evolution.
Molecular underpinnings of domestication and evolution are being uncovered in diverse crop species.

Conclusions:

Genomic approaches have significantly advanced the study of crop evolution.
Future research should focus on high-quality reference genomes, germplasm characterization, and novel methodologies like archaeogenetics, epigenomics, and genome editing.