Evidence map›Paper›PMID 19343317›Full record

ArticleTAG. Theoretical and applied genetics. Theoretische und angewandte Genetik2009

Population structure and linkage disequilibrium in barley assessed by DArT markers.

Li Yi Zhang, Suzanne Marchand, Nicholas A Tinker, François Belzile

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Article in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Extent and overlap of segregation distortion regions in 12 barley crosses determined via a Pool-GBS approach.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2016
    Article
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  11. Association mapping of salt tolerance in barley (Hordeum vulgare L.).TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2013
    Article
  12. Haplotype diversity and population structure in cultivated and wild barley evaluated for Fusarium head blight responses.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2013
    Article
  13. Article
  14. Article
  15. Genetic structure and linkage disequilibrium in landrace populations of barley in Sardinia.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2012
    Article
  16. Article
  17. Analysis of genetic structure in a panel of elite wheat varieties and relevance for association mapping.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2011
    Article
  18. Article
  19. Population structure and linkage disequilibrium in oat (Avena sativa L.): implications for genome-wide association studies.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2011
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Li Yi ZhangDépartement de Phytologie, Université Laval, Québec, QC, Canada.
Suzanne Marchand
Nicholas A Tinker
François Belzile

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Diversity Array Technology (DArT) markers were used to investigate the genetic diversity, population structure, and extent of linkage disequilibrium (LD) on a genome-wide level in Canadian barley (Hordeum vulgare L.). Approximately 1,000 DArT markers were polymorphic and scored with high confidence among a collection of 170 barley lines composed mostly of Canadian cultivars and breeding lines. The reproducibility of DArT markers proved very high, as 99.9% of allele calls were identical among seven replicated samples. The polymorphism information content (PIC) of DArT markers ranged between 0.04 and 0.50 with an average of 0.38. Using principal coordinate analysis (PCoA), most lines fell into one of two major groups reflecting inflorescence type (two-row versus six-row). Within these two large groups, evidence of geographic clustering of genotypes was also observed. A cluster analysis Unweighted Pair Group Method with Algorithmic Mean suggested the existence of three subgroups within the two-row group and four subgroups within the six-row group. An analysis of molecular variance (AMOVA) revealed highly significant (P < 0.001) genetic variance within subgroups, among subgroups, and among groups. Values of LD, expressed as r (2), declined with increasing genetic distance, and mean values of r (2) fell below 0.2 for markers located 2.6 cM apart. Approximately 8% of marker pairs located on the same chromosome and 3.4% of pairs located on different chromosomes were in LD (r ( 2 ) > 0.2). Within both the subsets of two-row and six-row lines, LD extended slightly further (3.5 cM) than for the entire set, while 7.5% of intra-chromosomal locus pairs and <2% of inter-chromosomal pairs were in LD. We discuss the implications of these findings with regard to the prospects of association mapping of complex traits in barley.

Indexed as

Genetic MarkersGenetics, PopulationLinkage DisequilibriumCanadaChromosome MappingCluster AnalysisGenome, PlantGenotypeHordeumPhylogenyPolymorphism, GeneticPrincipal Component AnalysisGenetic Markers

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.