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Related Concept Videos

Genomics02:02

Genomics

39.9K
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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Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.9K
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

9.0K
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.
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Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes

15.5K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
15.5K
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

48.4K
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
48.4K
Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

52.7K
Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
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Related Experiment Video

Updated: Jan 24, 2026

Culturing and Screening the Plant Parasitic Nematode Ditylenchus dipsaci
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Culturing and Screening the Plant Parasitic Nematode Ditylenchus dipsaci

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The draft genome of Ditylenchus dipsaci.

Benjamin Mimee1, Etienne Lord1, Pierre-Yves Véronneau1

  • 1Agriculture and Agri-Food Canada, St-Jean-sur-Richelieu Research and Development Centre , St-Jean-sur-Richelieu, J3B 3E6 QC , Canada.

Journal of Nematology
|May 28, 2019
PubMed
Summary

The first genome sequence of the devastating plant pest, Ditylenchus dipsaci, was generated using PacBio sequencing and CANU assembly. This provides a crucial resource for understanding and managing this important agricultural nematode.

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Area of Science:

  • Nematology
  • Genomics
  • Agricultural Entomology

Background:

  • Ditylenchus dipsaci is a significant agricultural pest causing widespread crop damage globally.
  • Understanding the genetic makeup of D. dipsaci is essential for developing effective control strategies.

Purpose of the Study:

  • To generate and present the first high-quality genome sequence of Ditylenchus dipsaci.
  • To provide a foundational genomic resource for research on this economically important nematode.

Main Methods:

  • High-quality genome sequencing was performed using PacBio technology.
  • The genome was assembled using the CANU software pipeline.

Main Results:

  • The first complete genome sequence for Ditylenchus dipsaci has been successfully generated.
  • This represents a significant advancement in the genomic resources available for this pest.

Conclusions:

  • The availability of the D. dipsaci genome sequence opens new avenues for research into its biology and pathogenicity.
  • This genomic resource will aid in the development of novel strategies for pest management and crop protection.