home news forum careers events suppliers solutions markets expos directories catalogs resources advertise contacts
 
News Page

The news
and
beyond the news
Index of news sources
All Africa Asia/Pacific Europe Latin America Middle East North America
  Topics
  Species
Archives
News archive 1997-2008
 

IWGSC to organize a webinar entitled "Evolution of recombination landscapes in diverging populations of bread wheat"


Deember 7, 2021
 


 

On 24 March 2022, the IWGSC will organize a webinar entitled "Evolution of recombination landscapes in diverging populations of bread wheat" presented by Alice Danguy des Déserts (INRAE-Université Clermont-Auvergne, France).

Time: 11:00am EDT, 4:00pm CET

Register here

Presenter: Alice Danguy des Déserts, INRAE-Université Clermont-Auvergne, UMR 1095, Génétique Diversité Ecophysiologie des Céréales, Clermont-Ferrand, France.

Outline

Reciprocal exchanges of DNA (crossovers) that occur during meiosis are mandatory to ensure the production of fertile gametes in sexually reproducing species. They also contribute to shuffle parental alleles into new combinations thereby fueling genetic variation and evolution. However, due to biological constraints, the recombination landscape is highly heterogeneous along the genome which limits the range of allelic combinations and the adaptability of populations. An approach to better understand the constraints on the recombination process is to study how it evolved in the past. In this work, we tackled this question by constructing recombination profiles in four diverging bread wheat (Triticum aestivum L.) populations established from 371 landraces genotyped at 200,062 SNPs. We used linkage disequilibrium (LD) patterns to estimate in each population the past distribution of recombination along the genome and characterize its fine-scale heterogeneity. At the megabase scale, recombination rates derived from LD patterns were consistent with family-based estimates obtained from a population of 406 recombinant inbred lines. Among the four populations, recombination landscapes were positively correlated between each other and shared a statistically significant proportion of highly recombinant intervals. However, this comparison also highlighted that the similarity in recombination landscapes between populations was significantly decreasing with their genetic differentiation in most regions of the genome. This observation was found to be robust to SNPs ascertainment and demography and suggests a relatively rapid evolution of factors determining the fine-scale localization of recombination in bread wheat.

Reference

  • Alice Danguy des Déserts, Sophie Bouchet, Pierre Sourdille, Bertrand Servin, Evolution of Recombination Landscapes in Diverging Populations of Bread Wheat, Genome Biology and Evolution, Volume 13, Issue 8, August 2021, evab152, https://doi.org/10.1093/gbe/evab152
  •  


More news from: IWGSC - International Wheat Genome Sequencing Consortium


Website: http://www.wheatgenome.org/

Published: December 7, 2021

The news item on this page is copyright by the organization where it originated
Fair use notice

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  Archive of the news section


Copyright @ 1992-2024 SeedQuest - All rights reserved