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Related Concept Videos

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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Genomics02:02

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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Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

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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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Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

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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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Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

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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.
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Novel Sequence Discovery by Subtractive Genomics
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Going beyond a reference genome in conservation genomics.

Cinta Pegueroles1, Marta Pascual1, Carlos Carreras1

  • 1Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Av. Diagonal 643. E08028, Barcelona, Spain; Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Av. Diagonal 643. E08028, Barcelona, Spain.

Trends in Ecology & Evolution
|December 1, 2023
PubMed
Summary
This summary is machine-generated.

Genomic data is vital for conserving fin whale populations. Whole-genome sequencing at the population level offers crucial insights beyond reference genomes for effective biodiversity management.

Keywords:
biodiversitydemographic historygenome diversityinbreedingpopulation structure

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Area of Science:

  • Conservation genetics
  • Population genomics
  • Marine mammal research

Background:

  • The global biodiversity crisis necessitates science-based conservation strategies.
  • Reference genomes are essential but insufficient for capturing population-level genetic diversity.
  • Understanding genetic diversity within populations is key to effective species management.

Purpose of the Study:

  • To provide essential genomic information for the conservation of Pacific fin whale populations.
  • To demonstrate the utility of population-level whole-genome sequencing in conservation efforts.
  • To highlight the limitations of reference genomes in capturing species diversity.

Main Methods:

  • Whole-genome sequencing (WGS) was employed at the population level.
  • Analysis focused on key genomic information relevant to conservation.
  • The study by Nigenda-Morales et al. utilized advanced genomic techniques.

Main Results:

  • Key genomic information for fin whale population conservation was generated.
  • Population-level WGS provided insights not captured by reference genomes alone.
  • The study offers a foundation for data-driven conservation of this species.

Conclusions:

  • Population-level genomic data is critical for addressing the biodiversity crisis.
  • Whole-genome sequencing offers a powerful tool for understanding and managing whale populations.
  • Integrating genomic data into conservation planning is essential for long-term success.