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Updated: Mar 7, 2026

Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
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Wheat Landrace Genome Diversity.

Luzie U Wingen1, Claire West2, Michelle Leverington-Waite2

  • 1Crop Genetics, John Innes Centre, Norwich NR4 7UH, UK luzie.wingen@jic.ac.uk.

Genetics
|February 19, 2017
PubMed
Summary
This summary is machine-generated.

Researchers mapped bread wheat (Triticum aestivum L.) genomes using a nested association mapping panel. They identified genetic variations and translocations, providing insights into wheat adaptation and breeding potential.

Keywords:
map distancemarker ordernested association mappingrecombination QTLsegregation distortiontranslocation

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Area of Science:

  • * Plant genetics and genomics
  • * Crop science and breeding

Background:

  • * Understanding bread wheat (Triticum aestivum L.) genomic complexity is crucial for crop domestication, adaptation, and improvement, especially concerning climate change.
  • * A diverse nested association mapping (NAM) panel was developed using landrace accessions to study post-domestication adaptation.

Purpose of the Study:

  • * To construct comparable genetic maps for a large NAM panel of bread wheat.
  • * To investigate genome fluidity and rigidity by analyzing marker order and distances.
  • * To identify loci controlling recombination rate for plant breeding applications.

Main Methods:

  • * Developed a NAM panel of 60 biparental populations from diverse landraces and an elite variety.
  • * Constructed comparable genetic maps using identical rules, identifying 1611 linkage groups and 126,300 crossover events.
  • * Built a consensus map (LRC) with 2498 genetic loci and analyzed marker order, distances, segregation distortion, and translocations.

Main Results:

  • * Highly correlated marker order indicated strong synteny, but exceptions revealed genome fluidity.
  • * Segregation distortion and translocations (e.g., T5B:7B) were detected in multiple populations.
  • * Identified 114 significant quantitative trait loci (QTL) for recombination rate, with many showing increased effects from non-reference parents.

Conclusions:

  • * The study provides valuable genetic tools for dissecting bread wheat's genomic architecture.
  • * Findings offer insights into genome dynamics, synteny, and structural variations in wheat.
  • * Identified QTL for recombination rate have direct implications for accelerating wheat breeding programs.