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Establishment of Novel Simple Sequence Repeat (SSR) Markers from Chimonanthus praecox Transcriptome Data and Their Application in the Identification of Varieties

  • 0Chongqing Engineering Research Center for Floriculture, Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China.
Plants (basel, Switzerland) +

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August 10, 2024

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August 10, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

This study developed new molecular markers for identifying varieties of the traditional Chinese flowering tree, Chimonanthus praecox. These expression sequence tag-simple sequence repeat (EST-SSR) markers effectively distinguished between 12 varieties, aiding in genetic diversity exploration.

Area Of Science

  • Plant genetics and breeding
  • Molecular biology
  • Bioinformatics

Background

  • Chimonanthus praecox is a significant traditional Chinese flowering tree with numerous varieties, but few are formally named.
  • Accurate identification of C. praecox varieties is crucial for breeding and conservation efforts.
  • Expression sequence tag-simple sequence repeat (EST-SSR) markers are valuable for plant variety identification.

Purpose Of The Study

  • To develop and characterize novel EST-SSR markers for Chimonanthus praecox.
  • To assess the utility of these markers for differentiating C. praecox varieties.
  • To provide molecular tools for genetic diversity studies and gene discovery in C. praecox.

Main Methods

  • RNA sequencing (RNA-seq) was used to assemble 162,638 unigenes from C. praecox.
  • Bioinformatic analysis identified 13,556 simple sequence repeat (SSR) loci from 11,691 unigenes.
  • 64,440 potential SSR primer pairs were designed, with 75 tested for amplification and polymorphism; 12 C. praecox varieties were analyzed.

Main Results

  • A total of 13,556 SSR loci were identified, with trinucleotide repeats being the most common.
  • Seven pairs of EST-SSR primers demonstrated high polymorphism and amplified fragments of expected sizes.
  • These markers successfully clustered 12 C. praecox varieties into two distinct monophyletic clades.

Conclusions

  • The transcriptome of C. praecox is rich in diverse and polymorphic microsatellites.
  • Developed EST-SSR markers are specific and effective for identifying C. praecox varieties.
  • These molecular markers facilitate genetic diversity assessment and the identification of genes related to important traits in C. praecox.

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