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Gene Flow02:39

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
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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...

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The poplar-poplar rust interaction: insights from genomics and transcriptomics.

Stéphane Hacquard1, Benjamin Petre, Pascal Frey

  • 1Institut National de la Recherche Agronomique (INRA), Nancy Université, Unité Mixte de Recherche 1136, "Interactions Arbres/Micro-organismes," Centre INRA de Nancy, 54280 Champenoux, France.

Journal of Pathogens
|May 9, 2012
PubMed
Summary

Investigating poplar and Melampsora larici-populina genomes revealed key genetic factors in plant-pathogen interactions. This research identifies potential resistance genes in poplar and candidate effectors in the rust fungus, aiding disease management.

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Annotation of Plant Gene Function via Combined Genomics, Metabolomics and Informatics
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Annotation of Plant Gene Function via Combined Genomics, Metabolomics and Informatics

Published on: June 17, 2012

Area of Science:

  • Plant Pathology
  • Genomics
  • Molecular Biology

Background:

  • Poplar plantations suffer significant losses due to Melampsora larici-populina leaf rust.
  • Molecular studies are hindered by the perennial nature of poplar and the obligate biotrophic lifestyle of the rust fungus.

Purpose of the Study:

  • To identify genetic determinants of resistance in poplar and virulence in M. larici-populina.
  • To understand host-pathogen interactions at a genomic and transcriptomic level.

Main Methods:

  • Comparative genomics of Populus trichocarpa and Melampsora larici-populina.
  • Analysis of gene families related to resistance and virulence.
  • Transcriptome analysis of compatible and incompatible interactions.

Main Results:

  • Poplar exhibits expanded resistance and defense gene families, suggesting perennial-specific adaptations.
  • The M. larici-populina genome contains numerous candidate effector genes (small secreted proteins).
  • Conserved poplar defense genes and regulated effector gene expression were observed during host colonization.

Conclusions:

  • Genomic insights provide a foundation for understanding poplar rust resistance and virulence.
  • Identification of candidate effectors and defense genes paves the way for functional studies and breeding strategies.
  • Further characterization of effector proteins is crucial for elucidating the molecular basis of the interaction.