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Genome wide association and haplotype analyses for the crease depth trait in bread wheat ( L.). | LitMetric

AI Article Synopsis

  • Wheat grain has a crease that is crucial for nutrient transport, but the genetic details of this crease are not well understood.
  • Researchers analyzed 413 wheat varieties and found significant variation in crease depth (CD), which is highly heritable and linked to grain and quality traits.
  • The study identified genetic segments associated with CD and discovered two promising genes that could help in wheat breeding, marking a major advancement in understanding the genetic basis of crease depth.

Article Abstract

Wheat grain has a complex structure that includes a crease on one side, and tissues within the crease region play an important role in nutrient transportation during wheat grain development. However, the genetic architecture of the crease region is still unclear. In this study, 413 global wheat accessions were resequenced and a method was developed for evaluating the phenotypic data of crease depth (CD). The CD values exhibited continuous and considerable large variation in the population, and the broad-sense heritability was 84.09%. CD was found to be positively correlated with grain-related traits and negatively with quality-related traits. Analysis of differentiation of traits between landraces and cultivars revealed that grain-related traits and CD were simultaneously improved during breeding improvement. Moreover, 2,150.8-Mb genetic segments were identified to fall within the selective sweeps between the landraces and cultivars; they contained some known functional genes for quality- and grain-related traits. Genome-wide association study (GWAS) was performed using around 10 million SNPs generated by genome resequencing and 551 significant SNPs and 18 QTLs were detected significantly associated with CD. Combined with cluster analysis of gene expression, haplotype analysis, and annotated information of candidate genes, two promising genes and were identified to potentially regulate CD. To the best of our knowledge, this is the first study to provide the genetic basis of CD, and the genetic loci identified in this study may ultimately assist in wheat breeding programs.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10350514PMC
http://dx.doi.org/10.3389/fpls.2023.1203253DOI Listing

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